Merge tag 's390-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Provide a new interface for dynamic configuration and deconfiguration
   of hotplug memory, allowing with and without memmap_on_memory
   support. This makes the way memory hotplug is handled on s390 much
   more similar to other architectures

 - Remove compat support. There shouldn't be any compat user space
   around anymore, therefore get rid of a lot of code which also doesn't
   need to be tested anymore

 - Add stackprotector support. GCC 16 will get new compiler options,
   which allow to generate code required for kernel stackprotector
   support

 - Merge pai_crypto and pai_ext PMU drivers into a new driver. This
   removes a lot of duplicated code. The new driver is also extendable
   and allows to support new PMUs

 - Add driver override support for AP queues

 - Rework and extend zcrypt and AP trace events to allow for tracing of
   crypto requests

 - Support block sizes larger than 65535 bytes for CCW tape devices

 - Since the rework of the virtual kernel address space the module area
   and the kernel image are within the same 4GB area. This eliminates
   the need of weak per cpu variables. Get rid of
   ARCH_MODULE_NEEDS_WEAK_PER_CPU

 - Various other small improvements and fixes

* tag 's390-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (92 commits)
  watchdog: diag288_wdt: Remove KMSG_COMPONENT macro
  s390/entry: Use lay instead of aghik
  s390/vdso: Get rid of -m64 flag handling
  s390/vdso: Rename vdso64 to vdso
  s390: Rename head64.S to head.S
  s390/vdso: Use common STABS_DEBUG and DWARF_DEBUG macros
  s390: Add stackprotector support
  s390/modules: Simplify module_finalize() slightly
  s390: Remove KMSG_COMPONENT macro
  s390/percpu: Get rid of ARCH_MODULE_NEEDS_WEAK_PER_CPU
  s390/ap: Restrict driver_override versus apmask and aqmask use
  s390/ap: Rename mutex ap_perms_mutex to ap_attr_mutex
  s390/ap: Support driver_override for AP queue devices
  s390/ap: Use all-bits-one apmask/aqmask for vfio in_use() checks
  s390/debug: Update description of resize operation
  s390/syscalls: Switch to generic system call table generation
  s390/syscalls: Remove system call table pointer from thread_struct
  s390/uapi: Remove 31 bit support from uapi header files
  s390: Remove compat support
  tools: Remove s390 compat support
  ...

96 files changed, 703 insertions, 889 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 6d84a02cfa5d..fc43f2703ae0 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -226,7 +226,6 @@ static int memory_block_online(struct memory_block *mem)
 	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
 	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
 	unsigned long nr_vmemmap_pages = 0;
-	struct memory_notify arg;
 	struct zone *zone;
 	int ret;
 
@@ -246,19 +245,9 @@ static int memory_block_online(struct memory_block *mem)
 	if (mem->altmap)
 		nr_vmemmap_pages = mem->altmap->free;
 
-	arg.altmap_start_pfn = start_pfn;
-	arg.altmap_nr_pages = nr_vmemmap_pages;
-	arg.start_pfn = start_pfn + nr_vmemmap_pages;
-	arg.nr_pages = nr_pages - nr_vmemmap_pages;
 	mem_hotplug_begin();
-	ret = memory_notify(MEM_PREPARE_ONLINE, &arg);
-	ret = notifier_to_errno(ret);
-	if (ret)
-		goto out_notifier;
-
 	if (nr_vmemmap_pages) {
-		ret = mhp_init_memmap_on_memory(start_pfn, nr_vmemmap_pages,
-						zone, mem->altmap->inaccessible);
+		ret = mhp_init_memmap_on_memory(start_pfn, nr_vmemmap_pages, zone);
 		if (ret)
 			goto out;
 	}
@@ -280,11 +269,7 @@ static int memory_block_online(struct memory_block *mem)
 					  nr_vmemmap_pages);
 
 	mem->zone = zone;
-	mem_hotplug_done();
-	return ret;
 out:
-	memory_notify(MEM_FINISH_OFFLINE, &arg);
-out_notifier:
 	mem_hotplug_done();
 	return ret;
 }
@@ -297,7 +282,6 @@ static int memory_block_offline(struct memory_block *mem)
 	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
 	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
 	unsigned long nr_vmemmap_pages = 0;
-	struct memory_notify arg;
 	int ret;
 
 	if (!mem->zone)
@@ -329,11 +313,6 @@ static int memory_block_offline(struct memory_block *mem)
 		mhp_deinit_memmap_on_memory(start_pfn, nr_vmemmap_pages);
 
 	mem->zone = NULL;
-	arg.altmap_start_pfn = start_pfn;
-	arg.altmap_nr_pages = nr_vmemmap_pages;
-	arg.start_pfn = start_pfn + nr_vmemmap_pages;
-	arg.nr_pages = nr_pages - nr_vmemmap_pages;
-	memory_notify(MEM_FINISH_OFFLINE, &arg);
 out:
 	mem_hotplug_done();
 	return ret;
diff --git a/drivers/char/hw_random/s390-trng.c b/drivers/char/hw_random/s390-trng.c
index d27e32e9bfee..3024d5e9fd61 100644
--- a/drivers/char/hw_random/s390-trng.c
+++ b/drivers/char/hw_random/s390-trng.c
@@ -9,8 +9,7 @@
  * Author(s): Harald Freudenberger <freude@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "trng"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "trng: " fmt
 
 #include <linux/hw_random.h>
 #include <linux/kernel.h>
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index d9996516f49e..a55967082ef6 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -8,8 +8,7 @@
  *   Jan Glauber <jang@linux.vnet.ibm.com>
  */
 
-#define KMSG_COMPONENT "zpci"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zpci: " fmt
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 7765e40f7cea..2f3039cca6f2 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3350,7 +3350,6 @@ dasd_device_operations = {
 	.open		= dasd_open,
 	.release	= dasd_release,
 	.ioctl		= dasd_ioctl,
-	.compat_ioctl	= dasd_ioctl,
 	.getgeo		= dasd_getgeo,
 	.set_read_only	= dasd_set_read_only,
 };
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 88fa17aea2ec..687396703788 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -16,7 +16,6 @@
 #include <linux/hdreg.h>	/* HDIO_GETGEO			    */
 #include <linux/bio.h>
 #include <linux/module.h>
-#include <linux/compat.h>
 #include <linux/init.h>
 #include <linux/seq_file.h>
 #include <linux/uaccess.h>
@@ -5389,16 +5388,6 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
 	rc = -EFAULT;
 	if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
 		goto out;
-	if (is_compat_task()) {
-		/* Make sure pointers are sane even on 31 bit. */
-		rc = -EINVAL;
-		if ((usrparm.psf_data >> 32) != 0)
-			goto out;
-		if ((usrparm.rssd_result >> 32) != 0)
-			goto out;
-		usrparm.psf_data &= 0x7fffffffULL;
-		usrparm.rssd_result &= 0x7fffffffULL;
-	}
 	/* at least 2 bytes are accessed and should be allocated */
 	if (usrparm.psf_data_len < 2) {
 		DBF_DEV_EVENT(DBF_WARNING, device,
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index a2216795591d..c2a87201c153 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -5,7 +5,6 @@
  * Copyright IBM Corp. 1999, 2009
  */
 
-#define KMSG_COMPONENT "dasd-fba"
 
 #include <linux/stddef.h>
 #include <linux/kernel.h>
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 8308046a9f8f..f883990be626 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -11,7 +11,6 @@
  */
 
 #include <linux/interrupt.h>
-#include <linux/compat.h>
 #include <linux/export.h>
 #include <linux/major.h>
 #include <linux/fs.h>
@@ -616,10 +615,7 @@ int dasd_ioctl(struct block_device *bdev, blk_mode_t mode,
 	void __user *argp;
 	int rc;
 
-	if (is_compat_task())
-		argp = compat_ptr(arg);
-	else
-		argp = (void __user *)arg;
+	argp = (void __user *)arg;
 
 	if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg)
 		return -EINVAL;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 86fef4b15015..38e1df8f8a82 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -5,8 +5,7 @@
  * Authors: Carsten Otte, Stefan Weinhuber, Gerald Schaefer
  */
 
-#define KMSG_COMPONENT "dcssblk"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "dcssblk: " fmt
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -674,8 +673,8 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
 	rc = dcssblk_assign_free_minor(dev_info);
 	if (rc)
 		goto release_gd;
-	sprintf(dev_info->gd->disk_name, "dcssblk%d",
-		dev_info->gd->first_minor);
+	scnprintf(dev_info->gd->disk_name, sizeof(dev_info->gd->disk_name),
+		  "dcssblk%d", dev_info->gd->first_minor);
 	list_add_tail(&dev_info->lh, &dcssblk_devices);
 
 	if (!try_module_get(THIS_MODULE)) {
diff --git a/drivers/s390/block/scm_blk.c b/drivers/s390/block/scm_blk.c
index 91bbe9d2e5ac..04e84f45dcc9 100644
--- a/drivers/s390/block/scm_blk.c
+++ b/drivers/s390/block/scm_blk.c
@@ -6,8 +6,7 @@
  * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
  */
 
-#define KMSG_COMPONENT "scm_block"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "scm_block: " fmt
 
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
diff --git a/drivers/s390/block/scm_drv.c b/drivers/s390/block/scm_drv.c
index 69a845eb8b1f..6cffbbe83f89 100644
--- a/drivers/s390/block/scm_drv.c
+++ b/drivers/s390/block/scm_drv.c
@@ -6,8 +6,7 @@
  * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
  */
 
-#define KMSG_COMPONENT "scm_block"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "scm_block: " fmt
 
 #include <linux/module.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index a367f95c7c53..4a7c084e68a6 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -21,7 +21,6 @@
 #include <linux/reboot.h>
 #include <linux/slab.h>
 #include <linux/memblock.h>
-#include <linux/compat.h>
 
 #include <asm/machine.h>
 #include <asm/ccwdev.h>
@@ -1662,7 +1661,7 @@ static void tty3270_escape_sequence(struct tty3270 *tp, u8 ch)
 		else if (tp->esc_par[0] == 6) {	/* Cursor report. */
 			char buf[40];
 
-			sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
+			scnprintf(buf, sizeof(buf), "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
 			kbd_puts_queue(&tp->port, buf);
 		}
 		return;
@@ -1947,21 +1946,6 @@ static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
 	return kbd_ioctl(tp->kbd, cmd, arg);
 }
 
-#ifdef CONFIG_COMPAT
-static long tty3270_compat_ioctl(struct tty_struct *tty,
-				 unsigned int cmd, unsigned long arg)
-{
-	struct tty3270 *tp;
-
-	tp = tty->driver_data;
-	if (!tp)
-		return -ENODEV;
-	if (tty_io_error(tty))
-		return -EIO;
-	return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
-}
-#endif
-
 static const struct tty_operations tty3270_ops = {
 	.install = tty3270_install,
 	.cleanup = tty3270_cleanup,
@@ -1976,9 +1960,6 @@ static const struct tty_operations tty3270_ops = {
 	.hangup = tty3270_hangup,
 	.wait_until_sent = tty3270_wait_until_sent,
 	.ioctl = tty3270_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = tty3270_compat_ioctl,
-#endif
 	.set_termios = tty3270_set_termios
 };
 
diff --git a/drivers/s390/char/diag_ftp.c b/drivers/s390/char/diag_ftp.c
index f41b39c9d267..a1e110c96f74 100644
--- a/drivers/s390/char/diag_ftp.c
+++ b/drivers/s390/char/diag_ftp.c
@@ -7,8 +7,7 @@
  *
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/mm.h>
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index cfe7efd5b5da..73555dbe30d0 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -12,7 +12,6 @@
 #include <linux/console.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-#include <linux/compat.h>
 #include <linux/sched/signal.h>
 #include <linux/module.h>
 #include <linux/list.h>
@@ -330,10 +329,7 @@ static long fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	fp = filp->private_data;
 	if (!fp)
 		return -ENODEV;
-	if (is_compat_task())
-		argp = compat_ptr(arg);
-	else
-		argp = (char __user *)arg;
+	argp = (char __user *)arg;
 	rc = 0;
 	mutex_lock(&fs3270_mutex);
 	switch (cmd) {
@@ -512,7 +508,6 @@ static const struct file_operations fs3270_fops = {
 	.read		 = fs3270_read,		/* read */
 	.write		 = fs3270_write,	/* write */
 	.unlocked_ioctl	 = fs3270_ioctl,	/* ioctl */
-	.compat_ioctl	 = fs3270_ioctl,	/* ioctl */
 	.open		 = fs3270_open,		/* open */
 	.release	 = fs3270_close,	/* release */
 };
diff --git a/drivers/s390/char/hmcdrv_cache.c b/drivers/s390/char/hmcdrv_cache.c
index 43df27ceec11..85fb689594ca 100644
--- a/drivers/s390/char/hmcdrv_cache.c
+++ b/drivers/s390/char/hmcdrv_cache.c
@@ -7,8 +7,7 @@
  *
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/mm.h>
diff --git a/drivers/s390/char/hmcdrv_dev.c b/drivers/s390/char/hmcdrv_dev.c
index b26fcf6849f2..04b938c5357f 100644
--- a/drivers/s390/char/hmcdrv_dev.c
+++ b/drivers/s390/char/hmcdrv_dev.c
@@ -14,8 +14,7 @@
  *    end read() the response.
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/module.h>
diff --git a/drivers/s390/char/hmcdrv_ftp.c b/drivers/s390/char/hmcdrv_ftp.c
index 4e3c7ec6749b..3312b2ac00a9 100644
--- a/drivers/s390/char/hmcdrv_ftp.c
+++ b/drivers/s390/char/hmcdrv_ftp.c
@@ -6,8 +6,7 @@
  *    Author(s): Ralf Hoppe (rhoppe@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/hmcdrv_mod.c b/drivers/s390/char/hmcdrv_mod.c
index 1447d0887225..b1cc5ba9fed8 100644
--- a/drivers/s390/char/hmcdrv_mod.c
+++ b/drivers/s390/char/hmcdrv_mod.c
@@ -6,8 +6,7 @@
  *    Author(s): Ralf Hoppe (rhoppe@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/module.h>
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index 2d9886651d9b..3d84f84b4cbd 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -7,8 +7,7 @@
  * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "monreader"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "monreader: " fmt
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 0fab1f025a94..cf2e51061422 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -7,8 +7,7 @@
  * Author(s): Melissa Howland <Melissa.Howland@us.ibm.com>
  */
 
-#define KMSG_COMPONENT "monwriter"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "monwriter: " fmt
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
diff --git a/drivers/s390/char/sclp_ap.c b/drivers/s390/char/sclp_ap.c
index 0dd1ca712795..18bb018b4e0c 100644
--- a/drivers/s390/char/sclp_ap.c
+++ b/drivers/s390/char/sclp_ap.c
@@ -4,8 +4,7 @@
  *
  * Copyright IBM Corp. 2020
  */
-#define KMSG_COMPONENT "sclp_cmd"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_cmd: " fmt
 
 #include <linux/export.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 3480198eac02..be4730936f5c 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -5,8 +5,7 @@
  * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "sclp_cmd"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_cmd: " fmt
 
 #include <linux/completion.h>
 #include <linux/err.h>
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c
index 356d26a09af0..9cfbe3fc3dca 100644
--- a/drivers/s390/char/sclp_config.c
+++ b/drivers/s390/char/sclp_config.c
@@ -3,8 +3,7 @@
  *    Copyright IBM Corp. 2007
  */
 
-#define KMSG_COMPONENT "sclp_config"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_config: " fmt
 
 #include <linux/init.h>
 #include <linux/errno.h>
diff --git a/drivers/s390/char/sclp_cpi_sys.c b/drivers/s390/char/sclp_cpi_sys.c
index d8f91aab11e8..8e1636bcf8b5 100644
--- a/drivers/s390/char/sclp_cpi_sys.c
+++ b/drivers/s390/char/sclp_cpi_sys.c
@@ -7,8 +7,7 @@
  *		 Michael Ernst <mernst@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "sclp_cpi"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_cpi: " fmt
 
 #include <linux/kernel.h>
 #include <linux/init.h>
diff --git a/drivers/s390/char/sclp_ctl.c b/drivers/s390/char/sclp_ctl.c
index dd6051602070..e23a97359286 100644
--- a/drivers/s390/char/sclp_ctl.c
+++ b/drivers/s390/char/sclp_ctl.c
@@ -7,7 +7,6 @@
  * Author: Michael Holzheu <holzheu@linux.vnet.ibm.com>
  */
 
-#include <linux/compat.h>
 #include <linux/uaccess.h>
 #include <linux/miscdevice.h>
 #include <linux/gfp.h>
@@ -43,10 +42,7 @@ static int sclp_ctl_cmdw_supported(unsigned int cmdw)
 
 static void __user *u64_to_uptr(u64 value)
 {
-	if (is_compat_task())
-		return compat_ptr(value);
-	else
-		return (void __user *)(unsigned long)value;
+	return (void __user *)(unsigned long)value;
 }
 
 /*
@@ -95,10 +91,7 @@ static long sclp_ctl_ioctl(struct file *filp, unsigned int cmd,
 {
 	void __user *argp;
 
-	if (is_compat_task())
-		argp = compat_ptr(arg);
-	else
-		argp = (void __user *) arg;
+	argp = (void __user *)arg;
 	switch (cmd) {
 	case SCLP_CTL_SCCB:
 		return sclp_ctl_ioctl_sccb(argp);
@@ -114,7 +107,6 @@ static const struct file_operations sclp_ctl_fops = {
 	.owner = THIS_MODULE,
 	.open = nonseekable_open,
 	.unlocked_ioctl = sclp_ctl_ioctl,
-	.compat_ioctl = sclp_ctl_ioctl,
 };
 
 /*
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index bd5e5ba50c0a..6bf501ad8ff0 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -5,8 +5,7 @@
  * Copyright IBM Corp. 2013
  */
 
-#define KMSG_COMPONENT "sclp_early"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_early: " fmt
 
 #include <linux/export.h>
 #include <linux/errno.h>
diff --git a/drivers/s390/char/sclp_ftp.c b/drivers/s390/char/sclp_ftp.c
index d27e2cbfbccb..2a1c4b2cafc8 100644
--- a/drivers/s390/char/sclp_ftp.c
+++ b/drivers/s390/char/sclp_ftp.c
@@ -7,8 +7,7 @@
  *
  */
 
-#define KMSG_COMPONENT "hmcdrv"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hmcdrv: " fmt
 
 #include <linux/kernel.h>
 #include <linux/mm.h>
diff --git a/drivers/s390/char/sclp_mem.c b/drivers/s390/char/sclp_mem.c
index 27f49f5fd358..676c085b4f8a 100644
--- a/drivers/s390/char/sclp_mem.c
+++ b/drivers/s390/char/sclp_mem.c
@@ -5,13 +5,15 @@
  * Copyright IBM Corp. 2025
  */
 
-#define KMSG_COMPONENT "sclp_mem"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_mem: " fmt
 
 #include <linux/cpufeature.h>
+#include <linux/container_of.h>
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/init.h>
+#include <linux/kobject.h>
+#include <linux/kstrtox.h>
 #include <linux/memory.h>
 #include <linux/memory_hotplug.h>
 #include <linux/mm.h>
@@ -27,7 +29,6 @@
 #define SCLP_CMDW_ASSIGN_STORAGE		0x000d0001
 #define SCLP_CMDW_UNASSIGN_STORAGE		0x000c0001
 
-static DEFINE_MUTEX(sclp_mem_mutex);
 static LIST_HEAD(sclp_mem_list);
 static u8 sclp_max_storage_id;
 static DECLARE_BITMAP(sclp_storage_ids, 256);
@@ -38,6 +39,18 @@ struct memory_increment {
 	int standby;
 };
 
+struct sclp_mem {
+	struct kobject kobj;
+	unsigned int id;
+	unsigned int memmap_on_memory;
+	unsigned int config;
+};
+
+struct sclp_mem_arg {
+	struct sclp_mem *sclp_mems;
+	struct kset *kset;
+};
+
 struct assign_storage_sccb {
 	struct sccb_header header;
 	u16 rn;
@@ -163,92 +176,168 @@ static int sclp_mem_change_state(unsigned long start, unsigned long size,
 	return rc ? -EIO : 0;
 }
 
-static bool contains_standby_increment(unsigned long start, unsigned long end)
+static ssize_t sclp_config_mem_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
 {
-	struct memory_increment *incr;
-	unsigned long istart;
+	struct sclp_mem *sclp_mem = container_of(kobj, struct sclp_mem, kobj);
 
-	list_for_each_entry(incr, &sclp_mem_list, list) {
-		istart = rn2addr(incr->rn);
-		if (end - 1 < istart)
-			continue;
-		if (start > istart + sclp.rzm - 1)
-			continue;
-		if (incr->standby)
-			return true;
-	}
-	return false;
+	return sysfs_emit(buf, "%u\n", READ_ONCE(sclp_mem->config));
 }
 
-static int sclp_mem_notifier(struct notifier_block *nb,
-			     unsigned long action, void *data)
+static ssize_t sclp_config_mem_store(struct kobject *kobj, struct kobj_attribute *attr,
+				     const char *buf, size_t count)
 {
-	unsigned long start, size;
-	struct memory_notify *arg;
+	unsigned long addr, block_size;
+	struct sclp_mem *sclp_mem;
+	struct memory_block *mem;
 	unsigned char id;
-	int rc = 0;
+	bool value;
+	int rc;
 
-	arg = data;
-	start = arg->start_pfn << PAGE_SHIFT;
-	size = arg->nr_pages << PAGE_SHIFT;
-	mutex_lock(&sclp_mem_mutex);
+	rc = kstrtobool(buf, &value);
+	if (rc)
+		return rc;
+	sclp_mem = container_of(kobj, struct sclp_mem, kobj);
+	block_size = memory_block_size_bytes();
+	addr = sclp_mem->id * block_size;
+	/*
+	 * Hold device_hotplug_lock when adding/removing memory blocks.
+	 * Additionally, also protect calls to find_memory_block() and
+	 * sclp_attach_storage().
+	 */
+	rc = lock_device_hotplug_sysfs();
+	if (rc)
+		goto out;
 	for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1)
 		sclp_attach_storage(id);
-	switch (action) {
-	case MEM_GOING_OFFLINE:
-		/*
-		 * Do not allow to set memory blocks offline that contain
-		 * standby memory. This is done to simplify the "memory online"
-		 * case.
-		 */
-		if (contains_standby_increment(start, start + size))
-			rc = -EPERM;
-		break;
-	case MEM_PREPARE_ONLINE:
+	if (value) {
+		if (sclp_mem->config)
+			goto out_unlock;
+		rc = sclp_mem_change_state(addr, block_size, 1);
+		if (rc)
+			goto out_unlock;
 		/*
-		 * Access the altmap_start_pfn and altmap_nr_pages fields
-		 * within the struct memory_notify specifically when dealing
-		 * with only MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers.
-		 *
-		 * When altmap is in use, take the specified memory range
-		 * online, which includes the altmap.
+		 * Set entire memory block CMMA state to nodat. Later, when
+		 * page tables pages are allocated via __add_memory(), those
+		 * regions are marked __arch_set_page_dat().
 		 */
-		if (arg->altmap_nr_pages) {
-			start = PFN_PHYS(arg->altmap_start_pfn);
-			size += PFN_PHYS(arg->altmap_nr_pages);
+		__arch_set_page_nodat((void *)__va(addr), block_size >> PAGE_SHIFT);
+		rc = __add_memory(0, addr, block_size,
+				  sclp_mem->memmap_on_memory ?
+				  MHP_MEMMAP_ON_MEMORY : MHP_NONE);
+		if (rc) {
+			sclp_mem_change_state(addr, block_size, 0);
+			goto out_unlock;
 		}
-		rc = sclp_mem_change_state(start, size, 1);
-		if (rc || !arg->altmap_nr_pages)
-			break;
-		/*
-		 * Set CMMA state to nodat here, since the struct page memory
-		 * at the beginning of the memory block will not go through the
-		 * buddy allocator later.
-		 */
-		__arch_set_page_nodat((void *)__va(start), arg->altmap_nr_pages);
-		break;
-	case MEM_FINISH_OFFLINE:
-		/*
-		 * When altmap is in use, take the specified memory range
-		 * offline, which includes the altmap.
-		 */
-		if (arg->altmap_nr_pages) {
-			start = PFN_PHYS(arg->altmap_start_pfn);
-			size += PFN_PHYS(arg->altmap_nr_pages);
+		mem = find_memory_block(pfn_to_section_nr(PFN_DOWN(addr)));
+		put_device(&mem->dev);
+		WRITE_ONCE(sclp_mem->config, 1);
+	} else {
+		if (!sclp_mem->config)
+			goto out_unlock;
+		mem = find_memory_block(pfn_to_section_nr(PFN_DOWN(addr)));
+		if (mem->state != MEM_OFFLINE) {
+			put_device(&mem->dev);
+			rc = -EBUSY;
+			goto out_unlock;
 		}
-		sclp_mem_change_state(start, size, 0);
-		break;
-	default:
-		break;
+		/* drop the ref just got via find_memory_block() */
+		put_device(&mem->dev);
+		sclp_mem_change_state(addr, block_size, 0);
+		__remove_memory(addr, block_size);
+		WRITE_ONCE(sclp_mem->config, 0);
+	}
+out_unlock:
+	unlock_device_hotplug();
+out:
+	return rc ? rc : count;
+}
+
+static struct kobj_attribute sclp_config_mem_attr =
+	__ATTR(config, 0644, sclp_config_mem_show, sclp_config_mem_store);
+
+static ssize_t sclp_memmap_on_memory_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+	struct sclp_mem *sclp_mem = container_of(kobj, struct sclp_mem, kobj);
+
+	return sysfs_emit(buf, "%u\n", READ_ONCE(sclp_mem->memmap_on_memory));
+}
+
+static ssize_t sclp_memmap_on_memory_store(struct kobject *kobj, struct kobj_attribute *attr,
+					   const char *buf, size_t count)
+{
+	struct sclp_mem *sclp_mem;
+	unsigned long block_size;
+	struct memory_block *mem;
+	bool value;
+	int rc;
+
+	rc = kstrtobool(buf, &value);
+	if (rc)
+		return rc;
+	if (value && !mhp_supports_memmap_on_memory())
+		return -EOPNOTSUPP;
+	rc = lock_device_hotplug_sysfs();
+	if (rc)
+		return rc;
+	block_size = memory_block_size_bytes();
+	sclp_mem = container_of(kobj, struct sclp_mem, kobj);
+	mem = find_memory_block(pfn_to_section_nr(PFN_DOWN(sclp_mem->id * block_size)));
+	if (!mem) {
+		WRITE_ONCE(sclp_mem->memmap_on_memory, value);
+	} else {
+		put_device(&mem->dev);
+		rc = -EBUSY;
 	}
-	mutex_unlock(&sclp_mem_mutex);
-	return rc ? NOTIFY_BAD : NOTIFY_OK;
+	unlock_device_hotplug();
+	return rc ? rc : count;
 }
 
-static struct notifier_block sclp_mem_nb = {
-	.notifier_call = sclp_mem_notifier,
+static const struct kobj_type ktype = {
+	.sysfs_ops = &kobj_sysfs_ops,
+};
+
+static struct kobj_attribute sclp_memmap_attr =
+	__ATTR(memmap_on_memory, 0644, sclp_memmap_on_memory_show, sclp_memmap_on_memory_store);
+
+static struct attribute *sclp_mem_attrs[] = {
+	&sclp_config_mem_attr.attr,
+	&sclp_memmap_attr.attr,
+	NULL,
 };
 
+static struct attribute_group sclp_mem_attr_group = {
+	.attrs = sclp_mem_attrs,
+};
+
+static int sclp_create_mem(struct sclp_mem *sclp_mem, struct kset *kset,
+			   unsigned int id, bool config, bool memmap_on_memory)
+{
+	int rc;
+
+	sclp_mem->memmap_on_memory = memmap_on_memory;
+	sclp_mem->config = config;
+	sclp_mem->id = id;
+	kobject_init(&sclp_mem->kobj, &ktype);
+	rc = kobject_add(&sclp_mem->kobj, &kset->kobj, "memory%d", id);
+	if (rc)
+		return rc;
+	return sysfs_create_group(&sclp_mem->kobj, &sclp_mem_attr_group);
+}
+
+static int sclp_create_configured_mem(struct memory_block *mem, void *argument)
+{
+	struct sclp_mem *sclp_mems;
+	struct sclp_mem_arg *arg;
+	struct kset *kset;
+	unsigned int id;
+
+	id = mem->dev.id;
+	arg = (struct sclp_mem_arg *)argument;
+	sclp_mems = arg->sclp_mems;
+	kset = arg->kset;
+	return sclp_create_mem(&sclp_mems[id], kset, id, true, false);
+}
+
 static void __init align_to_block_size(unsigned long *start,
 				       unsigned long *size,
 				       unsigned long alignment)
@@ -264,14 +353,17 @@ static void __init align_to_block_size(unsigned long *start,
 	*size = size_align;
 }
 
-static void __init add_memory_merged(u16 rn)
+static int __init sclp_create_standby_mems_merged(struct sclp_mem *sclp_mems,
+						  struct kset *kset, u16 rn)
 {
 	unsigned long start, size, addr, block_size;
 	static u16 first_rn, num;
+	unsigned int id;
+	int rc = 0;
 
 	if (rn && first_rn && (first_rn + num == rn)) {
 		num++;
-		return;
+		return rc;
 	}
 	if (!first_rn)
 		goto skip_add;
@@ -286,24 +378,57 @@ static void __init add_memory_merged(u16 rn)
 	if (!size)
 		goto skip_add;
 	for (addr = start; addr < start + size; addr += block_size) {
-		add_memory(0, addr, block_size,
-			   cpu_has_edat1() ?
-			   MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE);
+		id = addr / block_size;
+		rc = sclp_create_mem(&sclp_mems[id], kset, id, false,
+				     mhp_supports_memmap_on_memory());
+		if (rc)
+			break;
 	}
 skip_add:
 	first_rn = rn;
 	num = 1;
+	return rc;
 }
 
-static void __init sclp_add_standby_memory(void)
+static int __init sclp_create_standby_mems(struct sclp_mem *sclp_mems, struct kset *kset)
 {
 	struct memory_increment *incr;
+	int rc = 0;
 
 	list_for_each_entry(incr, &sclp_mem_list, list) {
 		if (incr->standby)
-			add_memory_merged(incr->rn);
+			rc = sclp_create_standby_mems_merged(sclp_mems, kset, incr->rn);
+		if (rc)
+			return rc;
 	}
-	add_memory_merged(0);
+	return sclp_create_standby_mems_merged(sclp_mems, kset, 0);
+}
+
+static int __init sclp_init_mem(void)
+{
+	const unsigned long block_size = memory_block_size_bytes();
+	unsigned int max_sclp_mems;
+	struct sclp_mem *sclp_mems;
+	struct sclp_mem_arg arg;
+	struct kset *kset;
+	int rc;
+
+	max_sclp_mems = roundup(sclp.rnmax * sclp.rzm, block_size) / block_size;
+	/* Allocate memory for all blocks ahead of time. */
+	sclp_mems = kcalloc(max_sclp_mems, sizeof(struct sclp_mem), GFP_KERNEL);
+	if (!sclp_mems)
+		return -ENOMEM;
+	kset = kset_create_and_add("memory", NULL, firmware_kobj);
+	if (!kset)
+		return -ENOMEM;
+	/* Initial memory is in the "configured" state already. */
+	arg.sclp_mems = sclp_mems;
+	arg.kset = kset;
+	rc = for_each_memory_block(&arg, sclp_create_configured_mem);
+	if (rc)
+		return rc;
+	/* Standby memory is "deconfigured". */
+	return sclp_create_standby_mems(sclp_mems, kset);
 }
 
 static void __init insert_increment(u16 rn, int standby, int assigned)
@@ -336,7 +461,7 @@ static void __init insert_increment(u16 rn, int standby, int assigned)
 	list_add(&new_incr->list, prev);
 }
 
-static int __init sclp_detect_standby_memory(void)
+static int __init sclp_setup_memory(void)
 {
 	struct read_storage_sccb *sccb;
 	int i, id, assigned, rc;
@@ -388,12 +513,9 @@ static int __init sclp_detect_standby_memory(void)
 		goto out;
 	for (i = 1; i <= sclp.rnmax - assigned; i++)
 		insert_increment(0, 1, 0);
-	rc = register_memory_notifier(&sclp_mem_nb);
-	if (rc)
-		goto out;
-	sclp_add_standby_memory();
+	rc = sclp_init_mem();
 out:
 	free_page((unsigned long)sccb);
 	return rc;
 }
-__initcall(sclp_detect_standby_memory);
+__initcall(sclp_setup_memory);
diff --git a/drivers/s390/char/sclp_ocf.c b/drivers/s390/char/sclp_ocf.c
index ae2479b804d8..35f3a4a08b12 100644
--- a/drivers/s390/char/sclp_ocf.c
+++ b/drivers/s390/char/sclp_ocf.c
@@ -6,8 +6,7 @@
  *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "sclp_ocf"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_ocf: " fmt
 
 #include <linux/export.h>
 #include <linux/kernel.h>
diff --git a/drivers/s390/char/sclp_pci.c b/drivers/s390/char/sclp_pci.c
index 56400886f7fc..899063e64aef 100644
--- a/drivers/s390/char/sclp_pci.c
+++ b/drivers/s390/char/sclp_pci.c
@@ -4,8 +4,7 @@
  *
  * Copyright IBM Corp. 2016
  */
-#define KMSG_COMPONENT "sclp_cmd"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_cmd: " fmt
 
 #include <linux/completion.h>
 #include <linux/export.h>
diff --git a/drivers/s390/char/sclp_sd.c b/drivers/s390/char/sclp_sd.c
index 129b89fe40a3..bb1bce70ec00 100644
--- a/drivers/s390/char/sclp_sd.c
+++ b/drivers/s390/char/sclp_sd.c
@@ -5,8 +5,7 @@
  * Copyright IBM Corp. 2017
  */
 
-#define KMSG_COMPONENT "sclp_sd"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_sd: " fmt
 
 #include <linux/completion.h>
 #include <linux/jiffies.h>
diff --git a/drivers/s390/char/sclp_sdias.c b/drivers/s390/char/sclp_sdias.c
index e915a343fcf5..ab8f1b758a1a 100644
--- a/drivers/s390/char/sclp_sdias.c
+++ b/drivers/s390/char/sclp_sdias.c
@@ -6,8 +6,7 @@
  * Author(s): Michael Holzheu
  */
 
-#define KMSG_COMPONENT "sclp_sdias"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "sclp_sdias: " fmt
 
 #include <linux/completion.h>
 #include <linux/sched.h>
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index 0aba30efb483..3953b31b0c55 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -130,6 +130,7 @@ struct tape_request {
 	int retries;			/* retry counter for error recovery. */
 	int rescnt;			/* residual count from devstat. */
 	struct timer_list timer;	/* timer for std_assign_timeout(). */
+	struct irb irb;			/* device status */
 
 	/* Callback for delivering final status. */
 	void (*callback)(struct tape_request *, void *);
@@ -151,8 +152,8 @@ struct tape_discipline {
 	int  (*setup_device)(struct tape_device *);
 	void (*cleanup_device)(struct tape_device *);
 	int (*irq)(struct tape_device *, struct tape_request *, struct irb *);
-	struct tape_request *(*read_block)(struct tape_device *, size_t);
-	struct tape_request *(*write_block)(struct tape_device *, size_t);
+	struct tape_request *(*read_block)(struct tape_device *);
+	struct tape_request *(*write_block)(struct tape_device *);
 	void (*process_eov)(struct tape_device*);
 	/* ioctl function for additional ioctls. */
 	int (*ioctl_fn)(struct tape_device *, unsigned int, unsigned long);
@@ -172,7 +173,7 @@ struct tape_discipline {
 
 /* Char Frontend Data */
 struct tape_char_data {
-	struct idal_buffer *idal_buf;	/* idal buffer for user char data */
+	struct idal_buffer **ibs;	/* idal buffer array for user char data */
 	int block_size;			/*   of size block_size. */
 };
 
@@ -234,6 +235,7 @@ struct tape_device {
 /* Externals from tape_core.c */
 extern struct tape_request *tape_alloc_request(int cplength, int datasize);
 extern void tape_free_request(struct tape_request *);
+extern int tape_check_idalbuffer(struct tape_device *device, size_t size);
 extern int tape_do_io(struct tape_device *, struct tape_request *);
 extern int tape_do_io_async(struct tape_device *, struct tape_request *);
 extern int tape_do_io_interruptible(struct tape_device *, struct tape_request *);
@@ -347,12 +349,21 @@ tape_ccw_repeat(struct ccw1 *ccw, __u8 cmd_code, int count)
 }
 
 static inline struct ccw1 *
+tape_ccw_dc_idal(struct ccw1 *ccw, __u8 cmd_code, struct idal_buffer *idal)
+{
+	ccw->cmd_code = cmd_code;
+	ccw->flags    = CCW_FLAG_DC;
+	idal_buffer_set_cda(idal, ccw);
+	return ccw + 1;
+}
+
+static inline struct ccw1 *
 tape_ccw_cc_idal(struct ccw1 *ccw, __u8 cmd_code, struct idal_buffer *idal)
 {
 	ccw->cmd_code = cmd_code;
 	ccw->flags    = CCW_FLAG_CC;
 	idal_buffer_set_cda(idal, ccw);
-	return ccw++;
+	return ccw + 1;
 }
 
 static inline struct ccw1 *
@@ -361,7 +372,7 @@ tape_ccw_end_idal(struct ccw1 *ccw, __u8 cmd_code, struct idal_buffer *idal)
 	ccw->cmd_code = cmd_code;
 	ccw->flags    = 0;
 	idal_buffer_set_cda(idal, ccw);
-	return ccw++;
+	return ccw + 1;
 }
 
 /* Global vars */
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 1e4984acb648..a13e0ac1a4e2 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -8,8 +8,7 @@
  *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "tape_34xx"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape_34xx: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
@@ -234,31 +233,6 @@ tape_34xx_unsolicited_irq(struct tape_device *device, struct irb *irb)
 	return TAPE_IO_SUCCESS;
 }
 
-/*
- * Read Opposite Error Recovery Function:
- * Used, when Read Forward does not work
- */
-static int
-tape_34xx_erp_read_opposite(struct tape_device *device,
-			    struct tape_request *request)
-{
-	if (request->op == TO_RFO) {
-		/*
-		 * We did read forward, but the data could not be read
-		 * *correctly*. We transform the request to a read backward
-		 * and try again.
-		 */
-		tape_std_read_backward(device, request);
-		return tape_34xx_erp_retry(request);
-	}
-
-	/*
-	 * We tried to read forward and backward, but hat no
-	 * success -> failed.
-	 */
-	return tape_34xx_erp_failed(request, -EIO);
-}
-
 static int
 tape_34xx_erp_bug(struct tape_device *device, struct tape_request *request,
 		  struct irb *irb, int no)
@@ -440,9 +414,6 @@ tape_34xx_unit_check(struct tape_device *device, struct tape_request *request,
 			dev_warn (&device->cdev->dev, "A write error on the "
 				"tape cannot be recovered\n");
 			return tape_34xx_erp_failed(request, -EIO);
-		case 0x26:
-			/* Data Check (read opposite) occurred. */
-			return tape_34xx_erp_read_opposite(device, request);
 		case 0x28:
 			/* ID-Mark at tape start couldn't be written */
 			dev_warn (&device->cdev->dev, "Writing the ID-mark "
diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c
index 2a2931d303cb..0d80f43b175d 100644
--- a/drivers/s390/char/tape_3590.c
+++ b/drivers/s390/char/tape_3590.c
@@ -8,8 +8,7 @@
  *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "tape_3590"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape_3590: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
@@ -551,31 +550,6 @@ tape_3590_mtseek(struct tape_device *device, int count)
 }
 
 /*
- * Read Opposite Error Recovery Function:
- * Used, when Read Forward does not work
- */
-static void
-tape_3590_read_opposite(struct tape_device *device,
-			struct tape_request *request)
-{
-	struct tape_3590_disc_data *data;
-
-	/*
-	 * We have allocated 4 ccws in tape_std_read, so we can now
-	 * transform the request to a read backward, followed by a
-	 * forward space block.
-	 */
-	request->op = TO_RBA;
-	tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
-	data = device->discdata;
-	tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
-			 device->char_data.idal_buf);
-	tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
-	tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
-	DBF_EVENT(6, "xrop ccwg\n");
-}
-
-/*
  * Read Attention Msg
  * This should be done after an interrupt with attention bit (0x80)
  * in device state.
@@ -897,60 +871,6 @@ tape_3590_erp_special_interrupt(struct tape_device *device,
 }
 
 /*
- *  RDA: Read Alternate
- */
-static int
-tape_3590_erp_read_alternate(struct tape_device *device,
-			     struct tape_request *request, struct irb *irb)
-{
-	struct tape_3590_disc_data *data;
-
-	/*
-	 * The issued Read Backward or Read Previous command is not
-	 * supported by the device
-	 * The recovery action should be to issue another command:
-	 * Read Revious: if Read Backward is not supported
-	 * Read Backward: if Read Previous is not supported
-	 */
-	data = device->discdata;
-	if (data->read_back_op == READ_PREVIOUS) {
-		DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
-			  device->cdev_id);
-		data->read_back_op = READ_BACKWARD;
-	} else {
-		DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
-			  device->cdev_id);
-		data->read_back_op = READ_PREVIOUS;
-	}
-	tape_3590_read_opposite(device, request);
-	return tape_3590_erp_retry(device, request, irb);
-}
-
-/*
- * Error Recovery read opposite
- */
-static int
-tape_3590_erp_read_opposite(struct tape_device *device,
-			    struct tape_request *request, struct irb *irb)
-{
-	switch (request->op) {
-	case TO_RFO:
-		/*
-		 * We did read forward, but the data could not be read.
-		 * We will read backward and then skip forward again.
-		 */
-		tape_3590_read_opposite(device, request);
-		return tape_3590_erp_retry(device, request, irb);
-	case TO_RBA:
-		/* We tried to read forward and backward, but hat no success */
-		return tape_3590_erp_failed(device, request, irb, -EIO);
-		break;
-	default:
-		return tape_3590_erp_failed(device, request, irb, -EIO);
-	}
-}
-
-/*
  * Print an MIM (Media Information  Message) (message code f0)
  */
 static void
@@ -1348,10 +1268,6 @@ tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
 		tape_3590_print_era_msg(device, irb);
 		return tape_3590_erp_read_buf_log(device, request, irb);
 
-	case 0x2011:
-		tape_3590_print_era_msg(device, irb);
-		return tape_3590_erp_read_alternate(device, request, irb);
-
 	case 0x2230:
 	case 0x2231:
 		tape_3590_print_era_msg(device, irb);
@@ -1405,12 +1321,6 @@ tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
 			tape_3590_print_era_msg(device, irb);
 			return tape_3590_erp_swap(device, request, irb);
 		}
-		if (sense->rac == 0x26) {
-			/* Read Opposite */
-			tape_3590_print_era_msg(device, irb);
-			return tape_3590_erp_read_opposite(device, request,
-							   irb);
-		}
 		return tape_3590_erp_basic(device, request, irb, -EIO);
 	case 0x5020:
 	case 0x5021:
diff --git a/drivers/s390/char/tape_char.c b/drivers/s390/char/tape_char.c
index 89778d922d9f..c5d3c303c15c 100644
--- a/drivers/s390/char/tape_char.c
+++ b/drivers/s390/char/tape_char.c
@@ -10,14 +10,12 @@
  *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "tape"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape: " fmt
 
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/mtio.h>
-#include <linux/compat.h>
 
 #include <linux/uaccess.h>
 
@@ -37,9 +35,6 @@ static ssize_t tapechar_write(struct file *, const char __user *, size_t, loff_t
 static int tapechar_open(struct inode *,struct file *);
 static int tapechar_release(struct inode *,struct file *);
 static long tapechar_ioctl(struct file *, unsigned int, unsigned long);
-#ifdef CONFIG_COMPAT
-static long tapechar_compat_ioctl(struct file *, unsigned int, unsigned long);
-#endif
 
 static const struct file_operations tape_fops =
 {
@@ -47,9 +42,6 @@ static const struct file_operations tape_fops =
 	.read = tapechar_read,
 	.write = tapechar_write,
 	.unlocked_ioctl = tapechar_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = tapechar_compat_ioctl,
-#endif
 	.open = tapechar_open,
 	.release = tapechar_release,
 };
@@ -64,7 +56,7 @@ tapechar_setup_device(struct tape_device * device)
 {
 	char	device_name[20];
 
-	sprintf(device_name, "ntibm%i", device->first_minor / 2);
+	scnprintf(device_name, sizeof(device_name), "ntibm%i", device->first_minor / 2);
 	device->nt = register_tape_dev(
 		&device->cdev->dev,
 		MKDEV(tapechar_major, device->first_minor),
@@ -93,33 +85,6 @@ tapechar_cleanup_device(struct tape_device *device)
 	device->nt = NULL;
 }
 
-static int
-tapechar_check_idalbuffer(struct tape_device *device, size_t block_size)
-{
-	struct idal_buffer *new;
-
-	if (device->char_data.idal_buf != NULL &&
-	    device->char_data.idal_buf->size == block_size)
-		return 0;
-
-	if (block_size > MAX_BLOCKSIZE) {
-		DBF_EVENT(3, "Invalid blocksize (%zd > %d)\n",
-			block_size, MAX_BLOCKSIZE);
-		return -EINVAL;
-	}
-
-	/* The current idal buffer is not correct. Allocate a new one. */
-	new = idal_buffer_alloc(block_size, 0);
-	if (IS_ERR(new))
-		return -ENOMEM;
-
-	if (device->char_data.idal_buf != NULL)
-		idal_buffer_free(device->char_data.idal_buf);
-
-	device->char_data.idal_buf = new;
-
-	return 0;
-}
 
 /*
  * Tape device read function
@@ -127,9 +92,12 @@ tapechar_check_idalbuffer(struct tape_device *device, size_t block_size)
 static ssize_t
 tapechar_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
 {
-	struct tape_device *device;
 	struct tape_request *request;
+	struct ccw1 *ccw, *last_ccw;
+	struct tape_device *device;
+	struct idal_buffer **ibs;
 	size_t block_size;
+	size_t read = 0;
 	int rc;
 
 	DBF_EVENT(6, "TCHAR:read\n");
@@ -156,24 +124,37 @@ tapechar_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
 		block_size = count;
 	}
 
-	rc = tapechar_check_idalbuffer(device, block_size);
+	rc = tape_check_idalbuffer(device, block_size);
 	if (rc)
 		return rc;
 
 	DBF_EVENT(6, "TCHAR:nbytes: %lx\n", block_size);
 	/* Let the discipline build the ccw chain. */
-	request = device->discipline->read_block(device, block_size);
+	request = device->discipline->read_block(device);
 	if (IS_ERR(request))
 		return PTR_ERR(request);
 	/* Execute it. */
 	rc = tape_do_io(device, request);
 	if (rc == 0) {
-		rc = block_size - request->rescnt;
 		DBF_EVENT(6, "TCHAR:rbytes:  %x\n", rc);
-		/* Copy data from idal buffer to user space. */
-		if (idal_buffer_to_user(device->char_data.idal_buf,
-					data, rc) != 0)
-			rc = -EFAULT;
+		/* Channel Program Address (cpa) points to last CCW + 8 */
+		last_ccw = dma32_to_virt(request->irb.scsw.cmd.cpa);
+		ccw = request->cpaddr;
+		ibs = device->char_data.ibs;
+		while (++ccw < last_ccw) {
+			/* Copy data from idal buffer to user space. */
+			if (idal_buffer_to_user(*ibs++, data, ccw->count) != 0) {
+				rc = -EFAULT;
+				break;
+			}
+			read += ccw->count;
+			data += ccw->count;
+		}
+		if (&last_ccw[-1] == &request->cpaddr[1] &&
+		    request->rescnt == last_ccw[-1].count)
+			rc = 0;
+		else
+			rc = read - request->rescnt;
 	}
 	tape_free_request(request);
 	return rc;
@@ -185,10 +166,12 @@ tapechar_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
 static ssize_t
 tapechar_write(struct file *filp, const char __user *data, size_t count, loff_t *ppos)
 {
-	struct tape_device *device;
 	struct tape_request *request;
+	struct ccw1 *ccw, *last_ccw;
+	struct tape_device *device;
+	struct idal_buffer **ibs;
+	size_t written = 0;
 	size_t block_size;
-	size_t written;
 	int nblocks;
 	int i, rc;
 
@@ -208,35 +191,45 @@ tapechar_write(struct file *filp, const char __user *data, size_t count, loff_t
 		nblocks = 1;
 	}
 
-	rc = tapechar_check_idalbuffer(device, block_size);
+	rc = tape_check_idalbuffer(device, block_size);
 	if (rc)
 		return rc;
 
-	DBF_EVENT(6,"TCHAR:nbytes: %lx\n", block_size);
+	DBF_EVENT(6, "TCHAR:nbytes: %lx\n", block_size);
 	DBF_EVENT(6, "TCHAR:nblocks: %x\n", nblocks);
 	/* Let the discipline build the ccw chain. */
-	request = device->discipline->write_block(device, block_size);
+	request = device->discipline->write_block(device);
 	if (IS_ERR(request))
 		return PTR_ERR(request);
-	rc = 0;
-	written = 0;
+
 	for (i = 0; i < nblocks; i++) {
-		/* Copy data from user space to idal buffer. */
-		if (idal_buffer_from_user(device->char_data.idal_buf,
-					  data, block_size)) {
-			rc = -EFAULT;
-			break;
+		size_t wbytes = 0; /* Used to trace written data in dbf */
+
+		ibs = device->char_data.ibs;
+		while (ibs && *ibs) {
+			if (idal_buffer_from_user(*ibs, data, (*ibs)->size)) {
+				rc = -EFAULT;
+				goto out;
+			}
+			data += (*ibs)->size;
+			ibs++;
 		}
 		rc = tape_do_io(device, request);
 		if (rc)
-			break;
-		DBF_EVENT(6, "TCHAR:wbytes: %lx\n",
-			  block_size - request->rescnt);
-		written += block_size - request->rescnt;
+			goto out;
+
+		/* Channel Program Address (cpa) points to last CCW + 8 */
+		last_ccw = dma32_to_virt(request->irb.scsw.cmd.cpa);
+		ccw = request->cpaddr;
+		while (++ccw < last_ccw)
+			wbytes += ccw->count;
+		DBF_EVENT(6, "TCHAR:wbytes: %lx\n", wbytes - request->rescnt);
+		written += wbytes - request->rescnt;
 		if (request->rescnt != 0)
 			break;
-		data += block_size;
 	}
+
+out:
 	tape_free_request(request);
 	if (rc == -ENOSPC) {
 		/*
@@ -324,10 +317,8 @@ tapechar_release(struct inode *inode, struct file *filp)
 		}
 	}
 
-	if (device->char_data.idal_buf != NULL) {
-		idal_buffer_free(device->char_data.idal_buf);
-		device->char_data.idal_buf = NULL;
-	}
+	if (device->char_data.ibs)
+		idal_buffer_array_free(&device->char_data.ibs);
 	tape_release(device);
 	filp->private_data = NULL;
 	tape_put_device(device);
@@ -442,25 +433,6 @@ tapechar_ioctl(struct file *filp, unsigned int no, unsigned long data)
 	return rc;
 }
 
-#ifdef CONFIG_COMPAT
-static long
-tapechar_compat_ioctl(struct file *filp, unsigned int no, unsigned long data)
-{
-	struct tape_device *device = filp->private_data;
-	long rc;
-
-	if (no == MTIOCPOS32)
-		no = MTIOCPOS;
-	else if (no == MTIOCGET32)
-		no = MTIOCGET;
-
-	mutex_lock(&device->mutex);
-	rc = __tapechar_ioctl(device, no, compat_ptr(data));
-	mutex_unlock(&device->mutex);
-	return rc;
-}
-#endif /* CONFIG_COMPAT */
-
 /*
  * Initialize character device frontend.
  */
diff --git a/drivers/s390/char/tape_class.c b/drivers/s390/char/tape_class.c
index fb18adfb95b5..6fa7b7824856 100644
--- a/drivers/s390/char/tape_class.c
+++ b/drivers/s390/char/tape_class.c
@@ -8,8 +8,7 @@
  * Based on simple class device code by Greg K-H
  */
 
-#define KMSG_COMPONENT "tape"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape: " fmt
 
 #include <linux/export.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 6ec812280221..0250076a7d9f 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -11,8 +11,7 @@
  *		 Stefan Bader <shbader@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "tape"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
@@ -726,6 +725,36 @@ tape_free_request (struct tape_request * request)
 	kfree(request);
 }
 
+int
+tape_check_idalbuffer(struct tape_device *device, size_t size)
+{
+	struct idal_buffer **new;
+	size_t old_size = 0;
+
+	old_size = idal_buffer_array_datasize(device->char_data.ibs);
+	if (old_size == size)
+		return 0;
+
+	if (size > MAX_BLOCKSIZE) {
+		DBF_EVENT(3, "Invalid blocksize (%zd > %d)\n",
+			  size, MAX_BLOCKSIZE);
+		return -EINVAL;
+	}
+
+	/* The current idal buffer is not correct. Allocate a new one. */
+	new = idal_buffer_array_alloc(size, 0);
+	if (IS_ERR(new))
+		return -ENOMEM;
+
+	/* Free old idal buffer array */
+	if (device->char_data.ibs)
+		idal_buffer_array_free(&device->char_data.ibs);
+
+	device->char_data.ibs = new;
+
+	return 0;
+}
+
 static int
 __tape_start_io(struct tape_device *device, struct tape_request *request)
 {
@@ -1099,9 +1128,10 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 	}
 
 	/* May be an unsolicited irq */
-	if(request != NULL)
+	if (request != NULL) {
 		request->rescnt = irb->scsw.cmd.count;
-	else if ((irb->scsw.cmd.dstat == 0x85 || irb->scsw.cmd.dstat == 0x80) &&
+		memcpy(&request->irb, irb, sizeof(*irb));
+	} else if ((irb->scsw.cmd.dstat == 0x85 || irb->scsw.cmd.dstat == 0x80) &&
 		 !list_empty(&device->req_queue)) {
 		/* Not Ready to Ready after long busy ? */
 		struct tape_request *req;
diff --git a/drivers/s390/char/tape_proc.c b/drivers/s390/char/tape_proc.c
index 2238d9df6c47..a1e5fab12af2 100644
--- a/drivers/s390/char/tape_proc.c
+++ b/drivers/s390/char/tape_proc.c
@@ -11,8 +11,7 @@
  * PROCFS Functions
  */
 
-#define KMSG_COMPONENT "tape"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape: " fmt
 
 #include <linux/module.h>
 #include <linux/vmalloc.h>
diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c
index 176ae8e2eb6b..43a5586685ff 100644
--- a/drivers/s390/char/tape_std.c
+++ b/drivers/s390/char/tape_std.c
@@ -11,8 +11,7 @@
  *		 Stefan Bader <shbader@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "tape"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "tape: " fmt
 
 #include <linux/export.h>
 #include <linux/stddef.h>
@@ -212,7 +211,7 @@ tape_std_mtload(struct tape_device *device, int count)
 int
 tape_std_mtsetblk(struct tape_device *device, int count)
 {
-	struct idal_buffer *new;
+	int rc;
 
 	DBF_LH(6, "tape_std_mtsetblk(%d)\n", count);
 	if (count <= 0) {
@@ -224,26 +223,12 @@ tape_std_mtsetblk(struct tape_device *device, int count)
 		device->char_data.block_size = 0;
 		return 0;
 	}
-	if (device->char_data.idal_buf != NULL &&
-	    device->char_data.idal_buf->size == count)
-		/* We already have a idal buffer of that size. */
-		return 0;
 
-	if (count > MAX_BLOCKSIZE) {
-		DBF_EVENT(3, "Invalid block size (%d > %d) given.\n",
-			count, MAX_BLOCKSIZE);
-		return -EINVAL;
-	}
+	rc = tape_check_idalbuffer(device, count);
+	if (rc)
+		return rc;
 
-	/* Allocate a new idal buffer. */
-	new = idal_buffer_alloc(count, 0);
-	if (IS_ERR(new))
-		return -ENOMEM;
-	if (device->char_data.idal_buf != NULL)
-		idal_buffer_free(device->char_data.idal_buf);
-	device->char_data.idal_buf = new;
 	device->char_data.block_size = count;
-
 	DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size);
 
 	return 0;
@@ -641,63 +626,54 @@ tape_std_mtcompression(struct tape_device *device, int mt_count)
  * Read Block
  */
 struct tape_request *
-tape_std_read_block(struct tape_device *device, size_t count)
+tape_std_read_block(struct tape_device *device)
 {
 	struct tape_request *request;
+	struct idal_buffer **ibs;
+	struct ccw1 *ccw;
+	size_t count;
 
-	/*
-	 * We have to alloc 4 ccws in order to be able to transform request
-	 * into a read backward request in error case.
-	 */
-	request = tape_alloc_request(4, 0);
+	ibs = device->char_data.ibs;
+	count = idal_buffer_array_size(ibs);
+	request = tape_alloc_request(count + 1 /* MODE_SET_DB */, 0);
 	if (IS_ERR(request)) {
 		DBF_EXCEPTION(6, "xrbl fail");
 		return request;
 	}
 	request->op = TO_RFO;
-	tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
-	tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD,
-			  device->char_data.idal_buf);
+	ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+	while (count-- > 1)
+		ccw = tape_ccw_dc_idal(ccw, READ_FORWARD, *ibs++);
+	tape_ccw_end_idal(ccw, READ_FORWARD, *ibs);
+
 	DBF_EVENT(6, "xrbl ccwg\n");
 	return request;
 }
 
 /*
- * Read Block backward transformation function.
- */
-void
-tape_std_read_backward(struct tape_device *device, struct tape_request *request)
-{
-	/*
-	 * We have allocated 4 ccws in tape_std_read, so we can now
-	 * transform the request to a read backward, followed by a
-	 * forward space block.
-	 */
-	request->op = TO_RBA;
-	tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
-	tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD,
-			 device->char_data.idal_buf);
-	tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
-	tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
-	DBF_EVENT(6, "xrop ccwg");}
-
-/*
  * Write Block
  */
 struct tape_request *
-tape_std_write_block(struct tape_device *device, size_t count)
+tape_std_write_block(struct tape_device *device)
 {
 	struct tape_request *request;
+	struct idal_buffer **ibs;
+	struct ccw1 *ccw;
+	size_t count;
 
-	request = tape_alloc_request(2, 0);
+	count = idal_buffer_array_size(device->char_data.ibs);
+	request = tape_alloc_request(count + 1 /* MODE_SET_DB */, 0);
 	if (IS_ERR(request)) {
 		DBF_EXCEPTION(6, "xwbl fail\n");
 		return request;
 	}
 	request->op = TO_WRI;
-	tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
-	tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD,
-			  device->char_data.idal_buf);
+	ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
+	ibs = device->char_data.ibs;
+	while (count-- > 1)
+		ccw = tape_ccw_dc_idal(ccw, WRITE_CMD, *ibs++);
+	tape_ccw_end_idal(ccw, WRITE_CMD, *ibs);
+
 	DBF_EVENT(6, "xwbl ccwg\n");
 	return request;
 }
@@ -741,6 +717,5 @@ EXPORT_SYMBOL(tape_std_mterase);
 EXPORT_SYMBOL(tape_std_mtunload);
 EXPORT_SYMBOL(tape_std_mtcompression);
 EXPORT_SYMBOL(tape_std_read_block);
-EXPORT_SYMBOL(tape_std_read_backward);
 EXPORT_SYMBOL(tape_std_write_block);
 EXPORT_SYMBOL(tape_std_process_eov);
diff --git a/drivers/s390/char/tape_std.h b/drivers/s390/char/tape_std.h
index dcc63ff587f9..2cf9f725b3b3 100644
--- a/drivers/s390/char/tape_std.h
+++ b/drivers/s390/char/tape_std.h
@@ -14,10 +14,9 @@
 #include <asm/tape390.h>
 
 /*
- * Biggest block size to handle. Currently 64K because we only build
- * channel programs without data chaining.
+ * Biggest block size of 256K to handle.
  */
-#define MAX_BLOCKSIZE   65535
+#define MAX_BLOCKSIZE	262144
 
 /*
  * The CCW commands for the Tape type of command.
@@ -97,10 +96,10 @@
 #define SENSE_TAPE_POSITIONING		0x01
 
 /* discipline functions */
-struct tape_request *tape_std_read_block(struct tape_device *, size_t);
+struct tape_request *tape_std_read_block(struct tape_device *);
 void tape_std_read_backward(struct tape_device *device,
 			    struct tape_request *request);
-struct tape_request *tape_std_write_block(struct tape_device *, size_t);
+struct tape_request *tape_std_write_block(struct tape_device *);
 
 /* Some non-mtop commands. */
 int tape_std_assign(struct tape_device *);
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 69899bb86b3e..bde6c9e59166 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -14,7 +14,6 @@
 
 #include <linux/fs.h>
 #include <linux/init.h>
-#include <linux/compat.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
@@ -204,10 +203,7 @@ static long vmcp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	int __user *argp;
 
 	session = file->private_data;
-	if (is_compat_task())
-		argp = compat_ptr(arg);
-	else
-		argp = (int __user *)arg;
+	argp = (int __user *)arg;
 	if (mutex_lock_interruptible(&session->mutex))
 		return -ERESTARTSYS;
 	switch (cmd) {
@@ -241,7 +237,6 @@ static const struct file_operations vmcp_fops = {
 	.read		= vmcp_read,
 	.write		= vmcp_write,
 	.unlocked_ioctl	= vmcp_ioctl,
-	.compat_ioctl	= vmcp_ioctl,
 };
 
 static struct miscdevice vmcp_dev = {
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index e284eea331d7..383e7e2bd69f 100644
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -11,8 +11,7 @@
  *
  */
 
-#define KMSG_COMPONENT "vmlogrdr"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "vmlogrdr: " fmt
 
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 0fd918769a4b..e3e0e9f36527 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -9,8 +9,7 @@
  *	    Frank Munzert <munzert@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "vmur"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "vmur: " fmt
 
 #include <linux/cdev.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 33cebb91b933..b26b5fca6ce8 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -9,8 +9,7 @@
  * Author(s): Michael Holzheu
  */
 
-#define KMSG_COMPONENT "zdump"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zdump: " fmt
 
 #include <linux/init.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c
index 93695d535380..738d5e2d5304 100644
--- a/drivers/s390/cio/blacklist.c
+++ b/drivers/s390/cio/blacklist.c
@@ -8,8 +8,7 @@
  *		 Arnd Bergmann (arndb@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/init.h>
 #include <linux/vmalloc.h>
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 2fc2ea4b2e3b..185c99c5d4cc 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -41,7 +41,7 @@ static void __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
 	char str[16];
 
 	for (i = 0; i < gdev->count; i++) {
-		sprintf(str, "cdev%d", i);
+		scnprintf(str, sizeof(str), "cdev%d", i);
 		sysfs_remove_link(&gdev->dev.kobj, str);
 		sysfs_remove_link(&gdev->cdev[i]->dev.kobj, "group_device");
 	}
@@ -249,12 +249,12 @@ static int __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
 		}
 	}
 	for (i = 0; i < gdev->count; i++) {
-		sprintf(str, "cdev%d", i);
+		scnprintf(str, sizeof(str), "cdev%d", i);
 		rc = sysfs_create_link(&gdev->dev.kobj,
 				       &gdev->cdev[i]->dev.kobj, str);
 		if (rc) {
 			while (i--) {
-				sprintf(str, "cdev%d", i);
+				scnprintf(str, sizeof(str), "cdev%d", i);
 				sysfs_remove_link(&gdev->dev.kobj, str);
 			}
 			for (i = 0; i < gdev->count; i++)
diff --git a/drivers/s390/cio/ccwreq.c b/drivers/s390/cio/ccwreq.c
index 73582a0a2622..763f477cc431 100644
--- a/drivers/s390/cio/ccwreq.c
+++ b/drivers/s390/cio/ccwreq.c
@@ -6,8 +6,7 @@
  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/types.h>
 #include <linux/err.h>
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index caa300160b17..c10e2444507e 100644
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -111,8 +111,9 @@ static int s390_vary_chpid(struct chp_id chpid, int on)
 	char dbf_text[15];
 	int status;
 
-	sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid,
-		chpid.id);
+	scnprintf(dbf_text, sizeof(dbf_text),
+		  on ? "varyon%x.%02x" : "varyoff%x.%02x",
+		  chpid.cssid, chpid.id);
 	CIO_TRACE_EVENT(2, dbf_text);
 
 	status = chp_get_status(chpid);
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 239c92d4ec11..fbb58edd6274 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -8,8 +8,7 @@
  *		 Arnd Bergmann (arndb@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
@@ -253,7 +252,7 @@ void chsc_chp_offline(struct chp_id chpid)
 	struct chp_link link;
 	char dbf_txt[15];
 
-	sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
+	scnprintf(dbf_txt, sizeof(dbf_txt), "chpr%x.%02x", chpid.cssid, chpid.id);
 	CIO_TRACE_EVENT(2, dbf_txt);
 
 	if (chp_get_status(chpid) <= 0)
@@ -284,11 +283,11 @@ static void s390_process_res_acc(struct chp_link *link)
 {
 	char dbf_txt[15];
 
-	sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
-		link->chpid.id);
+	scnprintf(dbf_txt, sizeof(dbf_txt), "accpr%x.%02x", link->chpid.cssid,
+		  link->chpid.id);
 	CIO_TRACE_EVENT( 2, dbf_txt);
 	if (link->fla != 0) {
-		sprintf(dbf_txt, "fla%x", link->fla);
+		scnprintf(dbf_txt, sizeof(dbf_txt), "fla%x", link->fla);
 		CIO_TRACE_EVENT( 2, dbf_txt);
 	}
 	/* Wait until previous actions have settled. */
@@ -757,7 +756,7 @@ void chsc_chp_online(struct chp_id chpid)
 	struct chp_link link;
 	char dbf_txt[15];
 
-	sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
+	scnprintf(dbf_txt, sizeof(dbf_txt), "cadd%x.%02x", chpid.cssid, chpid.id);
 	CIO_TRACE_EVENT(2, dbf_txt);
 
 	if (chp_get_status(chpid) != 0) {
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 1e58ee3cc87d..ce992b2107cb 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -9,7 +9,6 @@
  */
 
 #include <linux/slab.h>
-#include <linux/compat.h>
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -845,10 +844,7 @@ static long chsc_ioctl(struct file *filp, unsigned int cmd,
 	void __user *argp;
 
 	CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
-	if (is_compat_task())
-		argp = compat_ptr(arg);
-	else
-		argp = (void __user *)arg;
+	argp = (void __user *)arg;
 	switch (cmd) {
 	case CHSC_START:
 		return chsc_ioctl_start(argp);
@@ -923,7 +919,6 @@ static const struct file_operations chsc_fops = {
 	.open = chsc_open,
 	.release = chsc_release,
 	.unlocked_ioctl = chsc_ioctl,
-	.compat_ioctl = chsc_ioctl,
 };
 
 static struct miscdevice chsc_misc_device = {
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 21508e4606d5..70dc8cc76594 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -9,8 +9,7 @@
  *		 Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/export.h>
 #include <linux/ftrace.h>
@@ -113,7 +112,7 @@ cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
 	if (cio_update_schib(sch))
 		return -ENODEV;
 
-	sprintf(dbf_text, "no%s", dev_name(&sch->dev));
+	scnprintf(dbf_text, sizeof(dbf_text), "no%s", dev_name(&sch->dev));
 	CIO_TRACE_EVENT(0, dbf_text);
 	CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
 
diff --git a/drivers/s390/cio/cio_inject.c b/drivers/s390/cio/cio_inject.c
index a2e771ebae8e..0e18cb921ef6 100644
--- a/drivers/s390/cio/cio_inject.c
+++ b/drivers/s390/cio/cio_inject.c
@@ -6,8 +6,7 @@
  *    Author(s): Vineeth Vijayan <vneethv@linux.ibm.com>
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/slab.h>
 #include <linux/spinlock.h>
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index b7048f2b036e..7d035e4937ce 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -10,8 +10,7 @@
  * original idea from Natarajan Krishnaswami <nkrishna@us.ibm.com>
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/memblock.h>
 #include <linux/device.h>
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index be78a57f9bfd..4c85df7a548e 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -8,8 +8,7 @@
  *	      Cornelia Huck (cornelia.huck@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/export.h>
 #include <linux/init.h>
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 4b2dae6eb376..602f36102c7c 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -8,8 +8,7 @@
  *		 Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
-#define KMSG_COMPONENT "cio"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "cio: " fmt
 
 #include <linux/export.h>
 #include <linux/init.h>
diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c
index 0ff8482a7b15..f4096373c8c0 100644
--- a/drivers/s390/cio/device_status.c
+++ b/drivers/s390/cio/device_status.c
@@ -42,7 +42,7 @@ ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
 		      cdev->private->dev_id.devno, sch->schid.ssid,
 		      sch->schid.sch_no,
 		      scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw));
-	sprintf(dbf_text, "chk%x", sch->schid.sch_no);
+	scnprintf(dbf_text, sizeof(dbf_text), "chk%x", sch->schid.sch_no);
 	CIO_TRACE_EVENT(0, dbf_text);
 	CIO_HEX_EVENT(0, irb, sizeof(struct irb));
 }
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 65f1a127cc3f..a445494fd2be 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -11,8 +11,7 @@
  * Adjunct processor bus.
  */
 
-#define KMSG_COMPONENT "ap"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ap: " fmt
 
 #include <linux/kernel_stat.h>
 #include <linux/moduleparam.h>
@@ -86,8 +85,17 @@ DEFINE_SPINLOCK(ap_queues_lock);
 /* Default permissions (ioctl, card and domain masking) */
 struct ap_perms ap_perms;
 EXPORT_SYMBOL(ap_perms);
-DEFINE_MUTEX(ap_perms_mutex);
-EXPORT_SYMBOL(ap_perms_mutex);
+/* true if apmask and/or aqmask are NOT default */
+bool ap_apmask_aqmask_in_use;
+/* counter for how many driver_overrides are currently active */
+int ap_driver_override_ctr;
+/*
+ * Mutex for consistent read and write of the ap_perms struct,
+ * ap_apmask_aqmask_in_use, ap_driver_override_ctr
+ * and the ap bus sysfs attributes apmask and aqmask.
+ */
+DEFINE_MUTEX(ap_attr_mutex);
+EXPORT_SYMBOL(ap_attr_mutex);
 
 /* # of bindings complete since init */
 static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0);
@@ -853,20 +861,38 @@ static int __ap_revise_reserved(struct device *dev, void *dummy)
 	int rc, card, queue, devres, drvres;
 
 	if (is_queue_dev(dev)) {
-		card = AP_QID_CARD(to_ap_queue(dev)->qid);
-		queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
-		mutex_lock(&ap_perms_mutex);
-		devres = test_bit_inv(card, ap_perms.apm) &&
-			test_bit_inv(queue, ap_perms.aqm);
-		mutex_unlock(&ap_perms_mutex);
-		drvres = to_ap_drv(dev->driver)->flags
-			& AP_DRIVER_FLAG_DEFAULT;
-		if (!!devres != !!drvres) {
-			pr_debug("reprobing queue=%02x.%04x\n", card, queue);
-			rc = device_reprobe(dev);
-			if (rc)
-				AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n",
-					    __func__, card, queue);
+		struct ap_driver *ap_drv = to_ap_drv(dev->driver);
+		struct ap_queue *aq = to_ap_queue(dev);
+		struct ap_device *ap_dev = &aq->ap_dev;
+
+		card = AP_QID_CARD(aq->qid);
+		queue = AP_QID_QUEUE(aq->qid);
+
+		if (ap_dev->driver_override) {
+			if (strcmp(ap_dev->driver_override,
+				   ap_drv->driver.name)) {
+				pr_debug("reprobing queue=%02x.%04x\n", card, queue);
+				rc = device_reprobe(dev);
+				if (rc) {
+					AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n",
+						    __func__, card, queue);
+				}
+			}
+		} else {
+			mutex_lock(&ap_attr_mutex);
+			devres = test_bit_inv(card, ap_perms.apm) &&
+				test_bit_inv(queue, ap_perms.aqm);
+			mutex_unlock(&ap_attr_mutex);
+			drvres = to_ap_drv(dev->driver)->flags
+				& AP_DRIVER_FLAG_DEFAULT;
+			if (!!devres != !!drvres) {
+				pr_debug("reprobing queue=%02x.%04x\n", card, queue);
+				rc = device_reprobe(dev);
+				if (rc) {
+					AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n",
+						    __func__, card, queue);
+				}
+			}
 		}
 	}
 
@@ -884,22 +910,37 @@ static void ap_bus_revise_bindings(void)
  * @card: the APID of the adapter card to check
  * @queue: the APQI of the queue to check
  *
- * Note: the ap_perms_mutex must be locked by the caller of this function.
+ * Note: the ap_attr_mutex must be locked by the caller of this function.
  *
  * Return: an int specifying whether the AP adapter is reserved for the host (1)
  *	   or not (0).
  */
 int ap_owned_by_def_drv(int card, int queue)
 {
+	struct ap_queue *aq;
 	int rc = 0;
 
 	if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS)
 		return -EINVAL;
 
+	aq = ap_get_qdev(AP_MKQID(card, queue));
+	if (aq) {
+		const struct device_driver *drv = aq->ap_dev.device.driver;
+		const struct ap_driver *ap_drv = to_ap_drv(drv);
+		bool override = !!aq->ap_dev.driver_override;
+
+		if (override && drv && ap_drv->flags & AP_DRIVER_FLAG_DEFAULT)
+			rc = 1;
+		put_device(&aq->ap_dev.device);
+		if (override)
+			goto out;
+	}
+
 	if (test_bit_inv(card, ap_perms.apm) &&
 	    test_bit_inv(queue, ap_perms.aqm))
 		rc = 1;
 
+out:
 	return rc;
 }
 EXPORT_SYMBOL(ap_owned_by_def_drv);
@@ -911,7 +952,7 @@ EXPORT_SYMBOL(ap_owned_by_def_drv);
  * @apm: a bitmap specifying a set of APIDs comprising the APQNs to check
  * @aqm: a bitmap specifying a set of APQIs comprising the APQNs to check
  *
- * Note: the ap_perms_mutex must be locked by the caller of this function.
+ * Note: the ap_attr_mutex must be locked by the caller of this function.
  *
  * Return: an int specifying whether each APQN is reserved for the host (1) or
  *	   not (0)
@@ -922,12 +963,10 @@ int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
 	int card, queue, rc = 0;
 
 	for (card = 0; !rc && card < AP_DEVICES; card++)
-		if (test_bit_inv(card, apm) &&
-		    test_bit_inv(card, ap_perms.apm))
+		if (test_bit_inv(card, apm))
 			for (queue = 0; !rc && queue < AP_DOMAINS; queue++)
-				if (test_bit_inv(queue, aqm) &&
-				    test_bit_inv(queue, ap_perms.aqm))
-					rc = 1;
+				if (test_bit_inv(queue, aqm))
+					rc = ap_owned_by_def_drv(card, queue);
 
 	return rc;
 }
@@ -951,13 +990,19 @@ static int ap_device_probe(struct device *dev)
 		 */
 		card = AP_QID_CARD(to_ap_queue(dev)->qid);
 		queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
-		mutex_lock(&ap_perms_mutex);
-		devres = test_bit_inv(card, ap_perms.apm) &&
-			test_bit_inv(queue, ap_perms.aqm);
-		mutex_unlock(&ap_perms_mutex);
-		drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT;
-		if (!!devres != !!drvres)
-			goto out;
+		if (ap_dev->driver_override) {
+			if (strcmp(ap_dev->driver_override,
+				   ap_drv->driver.name))
+				goto out;
+		} else {
+			mutex_lock(&ap_attr_mutex);
+			devres = test_bit_inv(card, ap_perms.apm) &&
+				test_bit_inv(queue, ap_perms.aqm);
+			mutex_unlock(&ap_attr_mutex);
+			drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT;
+			if (!!devres != !!drvres)
+				goto out;
+		}
 	}
 
 	/*
@@ -983,8 +1028,17 @@ static int ap_device_probe(struct device *dev)
 	}
 
 out:
-	if (rc)
+	if (rc) {
 		put_device(dev);
+	} else {
+		if (is_queue_dev(dev)) {
+			pr_debug("queue=%02x.%04x new driver=%s\n",
+				 card, queue, ap_drv->driver.name);
+		} else {
+			pr_debug("card=%02x new driver=%s\n",
+				 to_ap_card(dev)->id, ap_drv->driver.name);
+		}
+	}
 	return rc;
 }
 
@@ -1437,12 +1491,12 @@ static ssize_t apmask_show(const struct bus_type *bus, char *buf)
 {
 	int rc;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 	rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n",
 			ap_perms.apm[0], ap_perms.apm[1],
 			ap_perms.apm[2], ap_perms.apm[3]);
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return rc;
 }
@@ -1452,6 +1506,7 @@ static int __verify_card_reservations(struct device_driver *drv, void *data)
 	int rc = 0;
 	struct ap_driver *ap_drv = to_ap_drv(drv);
 	unsigned long *newapm = (unsigned long *)data;
+	unsigned long aqm_any[BITS_TO_LONGS(AP_DOMAINS)];
 
 	/*
 	 * increase the driver's module refcounter to be sure it is not
@@ -1461,7 +1516,8 @@ static int __verify_card_reservations(struct device_driver *drv, void *data)
 		return 0;
 
 	if (ap_drv->in_use) {
-		rc = ap_drv->in_use(newapm, ap_perms.aqm);
+		bitmap_fill(aqm_any, AP_DOMAINS);
+		rc = ap_drv->in_use(newapm, aqm_any);
 		if (rc)
 			rc = -EBUSY;
 	}
@@ -1490,18 +1546,31 @@ static int apmask_commit(unsigned long *newapm)
 
 	memcpy(ap_perms.apm, newapm, APMASKSIZE);
 
+	/*
+	 * Update ap_apmask_aqmask_in_use. Note that the
+	 * ap_attr_mutex has to be obtained here.
+	 */
+	ap_apmask_aqmask_in_use =
+		bitmap_full(ap_perms.apm, AP_DEVICES) &&
+		bitmap_full(ap_perms.aqm, AP_DOMAINS) ?
+		false : true;
+
 	return 0;
 }
 
 static ssize_t apmask_store(const struct bus_type *bus, const char *buf,
 			    size_t count)
 {
-	int rc, changes = 0;
 	DECLARE_BITMAP(newapm, AP_DEVICES);
+	int rc = -EINVAL, changes = 0;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
+	/* Do not allow apmask/aqmask if driver override is active */
+	if (ap_driver_override_ctr)
+		goto done;
+
 	rc = ap_parse_bitmap_str(buf, ap_perms.apm, AP_DEVICES, newapm);
 	if (rc)
 		goto done;
@@ -1511,7 +1580,7 @@ static ssize_t apmask_store(const struct bus_type *bus, const char *buf,
 		rc = apmask_commit(newapm);
 
 done:
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -1529,12 +1598,12 @@ static ssize_t aqmask_show(const struct bus_type *bus, char *buf)
 {
 	int rc;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 	rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n",
 			ap_perms.aqm[0], ap_perms.aqm[1],
 			ap_perms.aqm[2], ap_perms.aqm[3]);
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return rc;
 }
@@ -1544,6 +1613,7 @@ static int __verify_queue_reservations(struct device_driver *drv, void *data)
 	int rc = 0;
 	struct ap_driver *ap_drv = to_ap_drv(drv);
 	unsigned long *newaqm = (unsigned long *)data;
+	unsigned long apm_any[BITS_TO_LONGS(AP_DEVICES)];
 
 	/*
 	 * increase the driver's module refcounter to be sure it is not
@@ -1553,7 +1623,8 @@ static int __verify_queue_reservations(struct device_driver *drv, void *data)
 		return 0;
 
 	if (ap_drv->in_use) {
-		rc = ap_drv->in_use(ap_perms.apm, newaqm);
+		bitmap_fill(apm_any, AP_DEVICES);
+		rc = ap_drv->in_use(apm_any, newaqm);
 		if (rc)
 			rc = -EBUSY;
 	}
@@ -1582,18 +1653,31 @@ static int aqmask_commit(unsigned long *newaqm)
 
 	memcpy(ap_perms.aqm, newaqm, AQMASKSIZE);
 
+	/*
+	 * Update ap_apmask_aqmask_in_use. Note that the
+	 * ap_attr_mutex has to be obtained here.
+	 */
+	ap_apmask_aqmask_in_use =
+		bitmap_full(ap_perms.apm, AP_DEVICES) &&
+		bitmap_full(ap_perms.aqm, AP_DOMAINS) ?
+		false : true;
+
 	return 0;
 }
 
 static ssize_t aqmask_store(const struct bus_type *bus, const char *buf,
 			    size_t count)
 {
-	int rc, changes = 0;
 	DECLARE_BITMAP(newaqm, AP_DOMAINS);
+	int rc = -EINVAL, changes = 0;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
+	/* Do not allow apmask/aqmask if driver override is active */
+	if (ap_driver_override_ctr)
+		goto done;
+
 	rc = ap_parse_bitmap_str(buf, ap_perms.aqm, AP_DOMAINS, newaqm);
 	if (rc)
 		goto done;
@@ -1603,7 +1687,7 @@ static ssize_t aqmask_store(const struct bus_type *bus, const char *buf,
 		rc = aqmask_commit(newaqm);
 
 done:
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -1650,6 +1734,15 @@ static ssize_t bindings_show(const struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(bindings);
 
+static ssize_t bindings_complete_count_show(const struct bus_type *bus,
+					    char *buf)
+{
+	return sysfs_emit(buf, "%llu\n",
+			  atomic64_read(&ap_bindings_complete_count));
+}
+
+static BUS_ATTR_RO(bindings_complete_count);
+
 static ssize_t features_show(const struct bus_type *bus, char *buf)
 {
 	int n = 0;
@@ -1690,6 +1783,7 @@ static struct attribute *ap_bus_attrs[] = {
 	&bus_attr_aqmask.attr,
 	&bus_attr_scans.attr,
 	&bus_attr_bindings.attr,
+	&bus_attr_bindings_complete_count.attr,
 	&bus_attr_features.attr,
 	NULL,
 };
@@ -2464,14 +2558,14 @@ static void __init ap_perms_init(void)
 	if (apm_str) {
 		memset(&ap_perms.apm, 0, sizeof(ap_perms.apm));
 		ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES,
-				  &ap_perms_mutex);
+				  &ap_attr_mutex);
 	}
 
 	/* aqm kernel parameter string */
 	if (aqm_str) {
 		memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm));
 		ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS,
-				  &ap_perms_mutex);
+				  &ap_attr_mutex);
 	}
 }
 
@@ -2484,15 +2578,15 @@ static int __init ap_module_init(void)
 {
 	int rc;
 
-	rc = ap_debug_init();
-	if (rc)
-		return rc;
-
 	if (!ap_instructions_available()) {
 		pr_warn("The hardware system does not support AP instructions\n");
 		return -ENODEV;
 	}
 
+	rc = ap_debug_init();
+	if (rc)
+		return rc;
+
 	/* init ap_queue hashtable */
 	hash_init(ap_queues);
 
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 4b7ffa840563..51e08f27bd75 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -166,6 +166,7 @@ void ap_driver_unregister(struct ap_driver *);
 struct ap_device {
 	struct device device;
 	int device_type;		/* AP device type. */
+	const char *driver_override;
 };
 
 #define to_ap_dev(x) container_of((x), struct ap_device, device)
@@ -280,7 +281,9 @@ struct ap_perms {
 };
 
 extern struct ap_perms ap_perms;
-extern struct mutex ap_perms_mutex;
+extern bool ap_apmask_aqmask_in_use;
+extern int ap_driver_override_ctr;
+extern struct mutex ap_attr_mutex;
 
 /*
  * Get ap_queue device for this qid.
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index ce953cbbd564..8102c8134c49 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -6,8 +6,7 @@
  * Adjunct processor bus, card related code.
  */
 
-#define KMSG_COMPONENT "ap"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ap: " fmt
 
 #include <linux/init.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 8977866fab1b..4a32c1e19a1e 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -6,17 +6,22 @@
  * Adjunct processor bus, queue related code.
  */
 
-#define KMSG_COMPONENT "ap"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ap: " fmt
 
 #include <linux/export.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <asm/facility.h>
 
+#define CREATE_TRACE_POINTS
+#include <asm/trace/ap.h>
+
 #include "ap_bus.h"
 #include "ap_debug.h"
 
+EXPORT_TRACEPOINT_SYMBOL(s390_ap_nqap);
+EXPORT_TRACEPOINT_SYMBOL(s390_ap_dqap);
+
 static void __ap_flush_queue(struct ap_queue *aq);
 
 /*
@@ -98,9 +103,17 @@ static inline struct ap_queue_status
 __ap_send(ap_qid_t qid, unsigned long psmid, void *msg, size_t msglen,
 	  int special)
 {
+	struct ap_queue_status status;
+
 	if (special)
 		qid |= 0x400000UL;
-	return ap_nqap(qid, psmid, msg, msglen);
+
+	status = ap_nqap(qid, psmid, msg, msglen);
+
+	trace_s390_ap_nqap(AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			   status.value, psmid);
+
+	return status;
 }
 
 /* State machine definitions and helpers */
@@ -140,6 +153,9 @@ static struct ap_queue_status ap_sm_recv(struct ap_queue *aq)
 		parts++;
 	} while (status.response_code == 0xFF && resgr0 != 0);
 
+	trace_s390_ap_dqap(AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid),
+			   status.value, aq->reply->psmid);
+
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
 		print_hex_dump_debug("aprpl: ", DUMP_PREFIX_ADDRESS, 16, 1,
@@ -714,6 +730,58 @@ static ssize_t ap_functions_show(struct device *dev,
 
 static DEVICE_ATTR_RO(ap_functions);
 
+static ssize_t driver_override_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct ap_queue *aq = to_ap_queue(dev);
+	struct ap_device *ap_dev = &aq->ap_dev;
+	int rc;
+
+	device_lock(dev);
+	if (ap_dev->driver_override)
+		rc = sysfs_emit(buf, "%s\n", ap_dev->driver_override);
+	else
+		rc = sysfs_emit(buf, "\n");
+	device_unlock(dev);
+
+	return rc;
+}
+
+static ssize_t driver_override_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct ap_queue *aq = to_ap_queue(dev);
+	struct ap_device *ap_dev = &aq->ap_dev;
+	int rc = -EINVAL;
+	bool old_value;
+
+	if (mutex_lock_interruptible(&ap_attr_mutex))
+		return -ERESTARTSYS;
+
+	/* Do not allow driver override if apmask/aqmask is in use */
+	if (ap_apmask_aqmask_in_use)
+		goto out;
+
+	old_value = ap_dev->driver_override ? true : false;
+	rc = driver_set_override(dev, &ap_dev->driver_override, buf, count);
+	if (rc)
+		goto out;
+	if (old_value && !ap_dev->driver_override)
+		--ap_driver_override_ctr;
+	else if (!old_value && ap_dev->driver_override)
+		++ap_driver_override_ctr;
+
+	rc = count;
+
+out:
+	mutex_unlock(&ap_attr_mutex);
+	return rc;
+}
+
+static DEVICE_ATTR_RW(driver_override);
+
 #ifdef CONFIG_AP_DEBUG
 static ssize_t states_show(struct device *dev,
 			   struct device_attribute *attr, char *buf)
@@ -826,6 +894,7 @@ static struct attribute *ap_queue_dev_attrs[] = {
 	&dev_attr_config.attr,
 	&dev_attr_chkstop.attr,
 	&dev_attr_ap_functions.attr,
+	&dev_attr_driver_override.attr,
 #ifdef CONFIG_AP_DEBUG
 	&dev_attr_states.attr,
 	&dev_attr_last_err_rc.attr,
diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index 01549003a903..ad1cd699f53b 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -7,8 +7,7 @@
  *  Author(s): Harald Freudenberger
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/init.h>
 #include <linux/miscdevice.h>
diff --git a/drivers/s390/crypto/pkey_base.c b/drivers/s390/crypto/pkey_base.c
index b15741461a63..d60cd987c16d 100644
--- a/drivers/s390/crypto/pkey_base.c
+++ b/drivers/s390/crypto/pkey_base.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/cpufeature.h>
 #include <linux/export.h>
diff --git a/drivers/s390/crypto/pkey_cca.c b/drivers/s390/crypto/pkey_cca.c
index 6c7897a93f27..d4550d8d8eea 100644
--- a/drivers/s390/crypto/pkey_cca.c
+++ b/drivers/s390/crypto/pkey_cca.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/init.h>
 #include <linux/module.h>
diff --git a/drivers/s390/crypto/pkey_ep11.c b/drivers/s390/crypto/pkey_ep11.c
index 6b23adc560c8..654eed20d0d9 100644
--- a/drivers/s390/crypto/pkey_ep11.c
+++ b/drivers/s390/crypto/pkey_ep11.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/init.h>
 #include <linux/module.h>
diff --git a/drivers/s390/crypto/pkey_pckmo.c b/drivers/s390/crypto/pkey_pckmo.c
index 7eca9f1340bd..793326c4c59a 100644
--- a/drivers/s390/crypto/pkey_pckmo.c
+++ b/drivers/s390/crypto/pkey_pckmo.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/init.h>
 #include <linux/module.h>
diff --git a/drivers/s390/crypto/pkey_sysfs.c b/drivers/s390/crypto/pkey_sysfs.c
index 792c0fce88fa..b6b0a46cb8a8 100644
--- a/drivers/s390/crypto/pkey_sysfs.c
+++ b/drivers/s390/crypto/pkey_sysfs.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/sysfs.h>
 
diff --git a/drivers/s390/crypto/pkey_uv.c b/drivers/s390/crypto/pkey_uv.c
index e5c6e01acaf3..6cd3c49384b5 100644
--- a/drivers/s390/crypto/pkey_uv.c
+++ b/drivers/s390/crypto/pkey_uv.c
@@ -5,8 +5,7 @@
  *  Copyright IBM Corp. 2024
  */
 
-#define KMSG_COMPONENT "pkey"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "pkey: " fmt
 
 #include <linux/cpufeature.h>
 #include <linux/init.h>
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index eb5ff49f6fe7..48da32ad0493 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -968,7 +968,7 @@ static int vfio_ap_mdev_verify_no_sharing(struct ap_matrix_mdev *assignee,
  *
  * Return: One of the following values:
  * o the error returned from the ap_apqn_in_matrix_owned_by_def_drv() function,
- *   most likely -EBUSY indicating the ap_perms_mutex lock is already held.
+ *   most likely -EBUSY indicating the ap_attr_mutex lock is already held.
  * o EADDRNOTAVAIL if an APQN assigned to @matrix_mdev is reserved for the
  *		   zcrypt default driver.
  * o EADDRINUSE if an APQN assigned to @matrix_mdev is assigned to another mdev
@@ -1079,7 +1079,7 @@ static ssize_t assign_adapter_store(struct device *dev,
 	DECLARE_BITMAP(apm_filtered, AP_DEVICES);
 	struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
 
-	mutex_lock(&ap_perms_mutex);
+	mutex_lock(&ap_attr_mutex);
 	get_update_locks_for_mdev(matrix_mdev);
 
 	ret = kstrtoul(buf, 0, &apid);
@@ -1114,7 +1114,7 @@ static ssize_t assign_adapter_store(struct device *dev,
 	ret = count;
 done:
 	release_update_locks_for_mdev(matrix_mdev);
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return ret;
 }
@@ -1303,7 +1303,7 @@ static ssize_t assign_domain_store(struct device *dev,
 	DECLARE_BITMAP(apm_filtered, AP_DEVICES);
 	struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
 
-	mutex_lock(&ap_perms_mutex);
+	mutex_lock(&ap_attr_mutex);
 	get_update_locks_for_mdev(matrix_mdev);
 
 	ret = kstrtoul(buf, 0, &apqi);
@@ -1338,7 +1338,7 @@ static ssize_t assign_domain_store(struct device *dev,
 	ret = count;
 done:
 	release_update_locks_for_mdev(matrix_mdev);
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return ret;
 }
@@ -1718,7 +1718,7 @@ static ssize_t ap_config_store(struct device *dev, struct device_attribute *attr
 		return -ENOMEM;
 	rest = newbuf;
 
-	mutex_lock(&ap_perms_mutex);
+	mutex_lock(&ap_attr_mutex);
 	get_update_locks_for_mdev(matrix_mdev);
 
 	/* Save old state */
@@ -1779,7 +1779,7 @@ static ssize_t ap_config_store(struct device *dev, struct device_attribute *attr
 	}
 out:
 	release_update_locks_for_mdev(matrix_mdev);
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 	kfree(newbuf);
 	return rc;
 }
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 4e6bf1cb3475..7a3b99f065f2 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -12,8 +12,7 @@
  *  Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
  */
 
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zcrypt: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
@@ -21,7 +20,6 @@
 #include <linux/interrupt.h>
 #include <linux/miscdevice.h>
 #include <linux/fs.h>
-#include <linux/compat.h>
 #include <linux/slab.h>
 #include <linux/atomic.h>
 #include <linux/uaccess.h>
@@ -163,7 +161,7 @@ static ssize_t ioctlmask_show(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 	int i, n;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	n = sysfs_emit(buf, "0x");
@@ -171,7 +169,7 @@ static ssize_t ioctlmask_show(struct device *dev,
 		n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
 	n += sysfs_emit_at(buf, n, "\n");
 
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return n;
 }
@@ -184,7 +182,7 @@ static ssize_t ioctlmask_store(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 
 	rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
-			       AP_IOCTLS, &ap_perms_mutex);
+			       AP_IOCTLS, &ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -200,7 +198,7 @@ static ssize_t apmask_show(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 	int i, n;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	n = sysfs_emit(buf, "0x");
@@ -208,7 +206,7 @@ static ssize_t apmask_show(struct device *dev,
 		n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
 	n += sysfs_emit_at(buf, n, "\n");
 
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return n;
 }
@@ -221,7 +219,7 @@ static ssize_t apmask_store(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 
 	rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
-			       AP_DEVICES, &ap_perms_mutex);
+			       AP_DEVICES, &ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -237,7 +235,7 @@ static ssize_t aqmask_show(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 	int i, n;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	n = sysfs_emit(buf, "0x");
@@ -245,7 +243,7 @@ static ssize_t aqmask_show(struct device *dev,
 		n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
 	n += sysfs_emit_at(buf, n, "\n");
 
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return n;
 }
@@ -258,7 +256,7 @@ static ssize_t aqmask_store(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 
 	rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
-			       AP_DOMAINS, &ap_perms_mutex);
+			       AP_DOMAINS, &ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -274,7 +272,7 @@ static ssize_t admask_show(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 	int i, n;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	n = sysfs_emit(buf, "0x");
@@ -282,7 +280,7 @@ static ssize_t admask_show(struct device *dev,
 		n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
 	n += sysfs_emit_at(buf, n, "\n");
 
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 
 	return n;
 }
@@ -295,7 +293,7 @@ static ssize_t admask_store(struct device *dev,
 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 
 	rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
-			       AP_DOMAINS, &ap_perms_mutex);
+			       AP_DOMAINS, &ap_attr_mutex);
 	if (rc)
 		return rc;
 
@@ -371,7 +369,7 @@ static int zcdn_create(const char *name)
 	int i, rc = 0;
 	struct zcdn_device *zcdndev;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	/* check if device node with this name already exists */
@@ -426,7 +424,7 @@ static int zcdn_create(const char *name)
 			__func__, MAJOR(devt), MINOR(devt));
 
 unlockout:
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 	return rc;
 }
 
@@ -435,7 +433,7 @@ static int zcdn_destroy(const char *name)
 	int rc = 0;
 	struct zcdn_device *zcdndev;
 
-	if (mutex_lock_interruptible(&ap_perms_mutex))
+	if (mutex_lock_interruptible(&ap_attr_mutex))
 		return -ERESTARTSYS;
 
 	/* try to find this zcdn device */
@@ -453,7 +451,7 @@ static int zcdn_destroy(const char *name)
 	device_unregister(&zcdndev->device);
 
 unlockout:
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 	return rc;
 }
 
@@ -463,7 +461,7 @@ static void zcdn_destroy_all(void)
 	dev_t devt;
 	struct zcdn_device *zcdndev;
 
-	mutex_lock(&ap_perms_mutex);
+	mutex_lock(&ap_attr_mutex);
 	for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 		devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 		zcdndev = find_zcdndev_by_devt(devt);
@@ -472,7 +470,7 @@ static void zcdn_destroy_all(void)
 			device_unregister(&zcdndev->device);
 		}
 	}
-	mutex_unlock(&ap_perms_mutex);
+	mutex_unlock(&ap_attr_mutex);
 }
 
 /*
@@ -509,11 +507,11 @@ static int zcrypt_open(struct inode *inode, struct file *filp)
 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 		struct zcdn_device *zcdndev;
 
-		if (mutex_lock_interruptible(&ap_perms_mutex))
+		if (mutex_lock_interruptible(&ap_attr_mutex))
 			return -ERESTARTSYS;
 		zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 		/* find returns a reference, no get_device() needed */
-		mutex_unlock(&ap_perms_mutex);
+		mutex_unlock(&ap_attr_mutex);
 		if (zcdndev)
 			perms = &zcdndev->perms;
 	}
@@ -533,9 +531,9 @@ static int zcrypt_release(struct inode *inode, struct file *filp)
 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 		struct zcdn_device *zcdndev;
 
-		mutex_lock(&ap_perms_mutex);
+		mutex_lock(&ap_attr_mutex);
 		zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
-		mutex_unlock(&ap_perms_mutex);
+		mutex_unlock(&ap_attr_mutex);
 		if (zcdndev) {
 			/* 2 puts here: one for find, one for open */
 			put_device(&zcdndev->device);
@@ -740,7 +738,8 @@ out:
 		tr->last_qid = qid;
 	}
 	trace_s390_zcrypt_rep(mex, func_code, rc,
-			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			      ap_msg.psmid);
 	return rc;
 }
 
@@ -845,7 +844,8 @@ out:
 		tr->last_qid = qid;
 	}
 	trace_s390_zcrypt_rep(crt, func_code, rc,
-			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			      ap_msg.psmid);
 	return rc;
 }
 
@@ -980,7 +980,8 @@ out:
 		tr->last_qid = qid;
 	}
 	trace_s390_zcrypt_rep(xcrb, func_code, rc,
-			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			      ap_msg.psmid);
 	return rc;
 }
 
@@ -1182,7 +1183,8 @@ out:
 		tr->last_qid = qid;
 	}
 	trace_s390_zcrypt_rep(xcrb, func_code, rc,
-			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			      ap_msg.psmid);
 	return rc;
 }
 
@@ -1274,7 +1276,8 @@ static long zcrypt_rng(char *buffer)
 out:
 	ap_release_apmsg(&ap_msg);
 	trace_s390_zcrypt_rep(buffer, func_code, rc,
-			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
+			      AP_QID_CARD(qid), AP_QID_QUEUE(qid),
+			      ap_msg.psmid);
 	return rc;
 }
 
@@ -1729,197 +1732,6 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
 	}
 }
 
-#ifdef CONFIG_COMPAT
-/*
- * ioctl32 conversion routines
- */
-struct compat_ica_rsa_modexpo {
-	compat_uptr_t	inputdata;
-	unsigned int	inputdatalength;
-	compat_uptr_t	outputdata;
-	unsigned int	outputdatalength;
-	compat_uptr_t	b_key;
-	compat_uptr_t	n_modulus;
-};
-
-static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
-			    unsigned int cmd, unsigned long arg)
-{
-	struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
-	struct compat_ica_rsa_modexpo mex32;
-	struct ica_rsa_modexpo mex64;
-	struct zcrypt_track tr;
-	long rc;
-
-	memset(&tr, 0, sizeof(tr));
-	if (copy_from_user(&mex32, umex32, sizeof(mex32)))
-		return -EFAULT;
-	mex64.inputdata = compat_ptr(mex32.inputdata);
-	mex64.inputdatalength = mex32.inputdatalength;
-	mex64.outputdata = compat_ptr(mex32.outputdata);
-	mex64.outputdatalength = mex32.outputdatalength;
-	mex64.b_key = compat_ptr(mex32.b_key);
-	mex64.n_modulus = compat_ptr(mex32.n_modulus);
-	do {
-		rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
-	} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-
-	/* on ENODEV failure: retry once again after a requested rescan */
-	if (rc == -ENODEV && zcrypt_process_rescan())
-		do {
-			rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
-		} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-	if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
-		rc = -EIO;
-	if (rc)
-		return rc;
-	return put_user(mex64.outputdatalength,
-			&umex32->outputdatalength);
-}
-
-struct compat_ica_rsa_modexpo_crt {
-	compat_uptr_t	inputdata;
-	unsigned int	inputdatalength;
-	compat_uptr_t	outputdata;
-	unsigned int	outputdatalength;
-	compat_uptr_t	bp_key;
-	compat_uptr_t	bq_key;
-	compat_uptr_t	np_prime;
-	compat_uptr_t	nq_prime;
-	compat_uptr_t	u_mult_inv;
-};
-
-static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
-				unsigned int cmd, unsigned long arg)
-{
-	struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
-	struct compat_ica_rsa_modexpo_crt crt32;
-	struct ica_rsa_modexpo_crt crt64;
-	struct zcrypt_track tr;
-	long rc;
-
-	memset(&tr, 0, sizeof(tr));
-	if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
-		return -EFAULT;
-	crt64.inputdata = compat_ptr(crt32.inputdata);
-	crt64.inputdatalength = crt32.inputdatalength;
-	crt64.outputdata = compat_ptr(crt32.outputdata);
-	crt64.outputdatalength = crt32.outputdatalength;
-	crt64.bp_key = compat_ptr(crt32.bp_key);
-	crt64.bq_key = compat_ptr(crt32.bq_key);
-	crt64.np_prime = compat_ptr(crt32.np_prime);
-	crt64.nq_prime = compat_ptr(crt32.nq_prime);
-	crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
-	do {
-		rc = zcrypt_rsa_crt(perms, &tr, &crt64);
-	} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-
-	/* on ENODEV failure: retry once again after a requested rescan */
-	if (rc == -ENODEV && zcrypt_process_rescan())
-		do {
-			rc = zcrypt_rsa_crt(perms, &tr, &crt64);
-		} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-	if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
-		rc = -EIO;
-	if (rc)
-		return rc;
-	return put_user(crt64.outputdatalength,
-			&ucrt32->outputdatalength);
-}
-
-struct compat_ica_xcrb {
-	unsigned short	agent_ID;
-	unsigned int	user_defined;
-	unsigned short	request_ID;
-	unsigned int	request_control_blk_length;
-	unsigned char	padding1[16 - sizeof(compat_uptr_t)];
-	compat_uptr_t	request_control_blk_addr;
-	unsigned int	request_data_length;
-	char		padding2[16 - sizeof(compat_uptr_t)];
-	compat_uptr_t	request_data_address;
-	unsigned int	reply_control_blk_length;
-	char		padding3[16 - sizeof(compat_uptr_t)];
-	compat_uptr_t	reply_control_blk_addr;
-	unsigned int	reply_data_length;
-	char		padding4[16 - sizeof(compat_uptr_t)];
-	compat_uptr_t	reply_data_addr;
-	unsigned short	priority_window;
-	unsigned int	status;
-} __packed;
-
-static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
-			 unsigned int cmd, unsigned long arg)
-{
-	struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
-	u32 xflags = ZCRYPT_XFLAG_USERSPACE;
-	struct compat_ica_xcrb xcrb32;
-	struct zcrypt_track tr;
-	struct ica_xcRB xcrb64;
-	long rc;
-
-	memset(&tr, 0, sizeof(tr));
-	if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
-		return -EFAULT;
-	xcrb64.agent_ID = xcrb32.agent_ID;
-	xcrb64.user_defined = xcrb32.user_defined;
-	xcrb64.request_ID = xcrb32.request_ID;
-	xcrb64.request_control_blk_length =
-		xcrb32.request_control_blk_length;
-	xcrb64.request_control_blk_addr =
-		compat_ptr(xcrb32.request_control_blk_addr);
-	xcrb64.request_data_length =
-		xcrb32.request_data_length;
-	xcrb64.request_data_address =
-		compat_ptr(xcrb32.request_data_address);
-	xcrb64.reply_control_blk_length =
-		xcrb32.reply_control_blk_length;
-	xcrb64.reply_control_blk_addr =
-		compat_ptr(xcrb32.reply_control_blk_addr);
-	xcrb64.reply_data_length = xcrb32.reply_data_length;
-	xcrb64.reply_data_addr =
-		compat_ptr(xcrb32.reply_data_addr);
-	xcrb64.priority_window = xcrb32.priority_window;
-	xcrb64.status = xcrb32.status;
-	do {
-		rc = _zcrypt_send_cprb(xflags, perms, &tr, &xcrb64);
-	} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-
-	/* on ENODEV failure: retry once again after a requested rescan */
-	if (rc == -ENODEV && zcrypt_process_rescan())
-		do {
-			rc = _zcrypt_send_cprb(xflags, perms, &tr, &xcrb64);
-		} while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
-	if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
-		rc = -EIO;
-	xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
-	xcrb32.reply_data_length = xcrb64.reply_data_length;
-	xcrb32.status = xcrb64.status;
-	if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
-		return -EFAULT;
-	return rc;
-}
-
-static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
-				unsigned long arg)
-{
-	int rc;
-	struct ap_perms *perms =
-		(struct ap_perms *)filp->private_data;
-
-	rc = zcrypt_check_ioctl(perms, cmd);
-	if (rc)
-		return rc;
-
-	if (cmd == ICARSAMODEXPO)
-		return trans_modexpo32(perms, filp, cmd, arg);
-	if (cmd == ICARSACRT)
-		return trans_modexpo_crt32(perms, filp, cmd, arg);
-	if (cmd == ZSECSENDCPRB)
-		return trans_xcrb32(perms, filp, cmd, arg);
-	return zcrypt_unlocked_ioctl(filp, cmd, arg);
-}
-#endif
-
 /*
  * Misc device file operations.
  */
@@ -1928,9 +1740,6 @@ static const struct file_operations zcrypt_fops = {
 	.read		= zcrypt_read,
 	.write		= zcrypt_write,
 	.unlocked_ioctl	= zcrypt_unlocked_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= zcrypt_compat_ioctl,
-#endif
 	.open		= zcrypt_open,
 	.release	= zcrypt_release,
 };
diff --git a/drivers/s390/crypto/zcrypt_card.c b/drivers/s390/crypto/zcrypt_card.c
index aa2c8ff2740e..6dea702a5cac 100644
--- a/drivers/s390/crypto/zcrypt_card.c
+++ b/drivers/s390/crypto/zcrypt_card.c
@@ -19,7 +19,6 @@
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/compat.h>
 #include <linux/slab.h>
 #include <linux/atomic.h>
 #include <linux/uaccess.h>
diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index a96e25614303..573bad1d6d86 100644
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -7,8 +7,7 @@
  *  Collection of CCA misc functions used by zcrypt and pkey
  */
 
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zcrypt: " fmt
 
 #include <linux/export.h>
 #include <linux/init.h>
diff --git a/drivers/s390/crypto/zcrypt_ep11misc.c b/drivers/s390/crypto/zcrypt_ep11misc.c
index e92e2fd8ce5d..3dda9589f2b9 100644
--- a/drivers/s390/crypto/zcrypt_ep11misc.c
+++ b/drivers/s390/crypto/zcrypt_ep11misc.c
@@ -6,8 +6,7 @@
  *  Collection of EP11 misc functions used by zcrypt and pkey
  */
 
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zcrypt: " fmt
 
 #include <linux/export.h>
 #include <linux/init.h>
diff --git a/drivers/s390/crypto/zcrypt_msgtype50.c b/drivers/s390/crypto/zcrypt_msgtype50.c
index fc0a2a053dc2..d6fc2d8e7fad 100644
--- a/drivers/s390/crypto/zcrypt_msgtype50.c
+++ b/drivers/s390/crypto/zcrypt_msgtype50.c
@@ -10,8 +10,7 @@
  *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.ibm.com>
  */
 
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zcrypt: " fmt
 
 #include <linux/module.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/crypto/zcrypt_msgtype6.c b/drivers/s390/crypto/zcrypt_msgtype6.c
index 9cefbb30960f..a0dcab5dc4f2 100644
--- a/drivers/s390/crypto/zcrypt_msgtype6.c
+++ b/drivers/s390/crypto/zcrypt_msgtype6.c
@@ -10,8 +10,7 @@
  *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.ibm.com>
  */
 
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zcrypt: " fmt
 
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/s390/crypto/zcrypt_queue.c b/drivers/s390/crypto/zcrypt_queue.c
index 76a8678bdad6..a173d32eb6e8 100644
--- a/drivers/s390/crypto/zcrypt_queue.c
+++ b/drivers/s390/crypto/zcrypt_queue.c
@@ -19,7 +19,6 @@
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/compat.h>
 #include <linux/slab.h>
 #include <linux/atomic.h>
 #include <linux/uaccess.h>
diff --git a/drivers/s390/net/ctcm_fsms.c b/drivers/s390/net/ctcm_fsms.c
index 9678c6a2cda7..e221687a9858 100644
--- a/drivers/s390/net/ctcm_fsms.c
+++ b/drivers/s390/net/ctcm_fsms.c
@@ -12,8 +12,7 @@
 #undef DEBUGDATA
 #undef DEBUGCCW
 
-#define KMSG_COMPONENT "ctcm"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ctcm: " fmt
 
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index b93c2eb45916..3d7ccf2366a0 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -20,8 +20,7 @@
 #undef DEBUGDATA
 #undef DEBUGCCW
 
-#define KMSG_COMPONENT "ctcm"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ctcm: " fmt
 
 #include <linux/module.h>
 #include <linux/init.h>
diff --git a/drivers/s390/net/ctcm_mpc.c b/drivers/s390/net/ctcm_mpc.c
index 407b7c516658..0f329fb514ee 100644
--- a/drivers/s390/net/ctcm_mpc.c
+++ b/drivers/s390/net/ctcm_mpc.c
@@ -18,8 +18,7 @@
 #undef DEBUGDATA
 #undef DEBUGCCW
 
-#define KMSG_COMPONENT "ctcm"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ctcm: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
index 0c5d8a3eaa2e..529a1c40ae63 100644
--- a/drivers/s390/net/ctcm_sysfs.c
+++ b/drivers/s390/net/ctcm_sysfs.c
@@ -9,8 +9,7 @@
 #undef DEBUGDATA
 #undef DEBUGCCW
 
-#define KMSG_COMPONENT "ctcm"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ctcm: " fmt
 
 #include <linux/device.h>
 #include <linux/sysfs.h>
diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index f84aa2e676e9..8b8e4f06be0f 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -4,8 +4,7 @@
  *
  * Copyright IBM Corp. 2018
  */
-#define KMSG_COMPONENT "ism"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "ism: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index edc0bcd46923..64d45285651d 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -7,10 +7,8 @@
  *		 Frank Blaschka <frank.blaschka@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "qeth"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "qeth: " fmt
 
-#include <linux/compat.h>
 #include <linux/export.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -4805,8 +4803,7 @@ static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
 
 	rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
 	if (!rc) {
-		tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
-					 u64_to_user_ptr(oat_data.ptr);
+		tmp = u64_to_user_ptr(oat_data.ptr);
 		oat_data.response_len = priv.response_len;
 
 		if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index c0e4883be6d0..a3b16d4d16fb 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -7,8 +7,7 @@
  *		 Frank Blaschka <frank.blaschka@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "qeth"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "qeth: " fmt
 
 #include <linux/list.h>
 #include <linux/rwsem.h>
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
index f184c58ecf24..d214a889cf4e 100644
--- a/drivers/s390/net/qeth_ethtool.c
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -3,8 +3,7 @@
  * Copyright IBM Corp. 2018
  */
 
-#define KMSG_COMPONENT "qeth"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "qeth: " fmt
 
 #include <linux/ethtool.h>
 #include "qeth_core.h"
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 2a3888283a94..7498a83b1f06 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -7,8 +7,7 @@
  *		 Frank Blaschka <frank.blaschka@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "qeth"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "qeth: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 3525be819362..027bc346232f 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -7,8 +7,7 @@
  *		 Frank Blaschka <frank.blaschka@de.ibm.com>
  */
 
-#define KMSG_COMPONENT "qeth"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "qeth: " fmt
 
 #include <linux/export.h>
 #include <linux/module.h>
diff --git a/drivers/s390/net/smsgiucv_app.c b/drivers/s390/net/smsgiucv_app.c
index 4bd4d6bfc126..7041c1dca1e8 100644
--- a/drivers/s390/net/smsgiucv_app.c
+++ b/drivers/s390/net/smsgiucv_app.c
@@ -10,8 +10,7 @@
  * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
  *
  */
-#define KMSG_COMPONENT		"smsgiucv_app"
-#define pr_fmt(fmt)		KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "smsgiucv_app: " fmt
 
 #include <linux/ctype.h>
 #include <linux/err.h>
@@ -161,7 +160,7 @@ static int __init smsgiucv_app_init(void)
 	if (!smsgiucv_drv)
 		return -ENODEV;
 
-	smsg_app_dev = iucv_alloc_device(NULL, smsgiucv_drv, NULL, KMSG_COMPONENT);
+	smsg_app_dev = iucv_alloc_device(NULL, smsgiucv_drv, NULL, "smsgiucv_app");
 	if (!smsg_app_dev)
 		return -ENOMEM;
 
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index dc2265ebb11b..01f927ae61b5 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -28,8 +28,7 @@
  *	      Benjamin Block
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/seq_file.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index bdf2cc1ea713..67cb947048c4 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2010
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/module.h>
 #include "zfcp_ext.h"
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index d904625afd40..6b5561c54e2f 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2023
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/module.h>
 #include <linux/ctype.h>
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index ffd994416995..ec6c0e102119 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2020
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/kthread.h>
 #include <linux/bug.h>
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 1d50f463afe7..78ca394e1195 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2008, 2017
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/types.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index c5bba1be88f4..9418086368c3 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2023
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/blktrace_api.h>
 #include <linux/jiffies.h>
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index f2410bc44ad3..e15a1eabe42d 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2020
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/lockdep.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index b31f860af47b..141476ea21bb 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2002, 2020
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/module.h>
 #include <linux/types.h>
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c
index 90a84ae98b97..10a3840b2b6b 100644
--- a/drivers/s390/scsi/zfcp_sysfs.c
+++ b/drivers/s390/scsi/zfcp_sysfs.c
@@ -7,8 +7,7 @@
  * Copyright IBM Corp. 2008, 2020
  */
 
-#define KMSG_COMPONENT "zfcp"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zfcp: " fmt
 
 #include <linux/slab.h>
 #include "zfcp_diag.h"
diff --git a/drivers/watchdog/diag288_wdt.c b/drivers/watchdog/diag288_wdt.c
index 887d5a6c155b..9daed2758ae5 100644
--- a/drivers/watchdog/diag288_wdt.c
+++ b/drivers/watchdog/diag288_wdt.c
@@ -18,8 +18,7 @@
  *
  */
 
-#define KMSG_COMPONENT "diag288_wdt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "diag288_wdt: " fmt
 
 #include <linux/init.h>
 #include <linux/kernel.h>