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
  ...

1 files changed, 10 insertions, 12 deletions

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 93e1034485d7..3affba95845b 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -119,18 +119,12 @@ extern void execve_tail(void);
 unsigned long vdso_text_size(void);
 unsigned long vdso_size(void);
 
-/*
- * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
- */
-
-#define TASK_SIZE		(test_thread_flag(TIF_31BIT) ? \
-					_REGION3_SIZE : TASK_SIZE_MAX)
-#define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_31BIT) ? \
-					(_REGION3_SIZE >> 1) : (_REGION2_SIZE >> 1))
+#define TASK_SIZE		(TASK_SIZE_MAX)
+#define TASK_UNMAPPED_BASE	(_REGION2_SIZE >> 1)
 #define TASK_SIZE_MAX		(-PAGE_SIZE)
 
 #define VDSO_BASE		(STACK_TOP + PAGE_SIZE)
-#define VDSO_LIMIT		(test_thread_flag(TIF_31BIT) ? _REGION3_SIZE : _REGION2_SIZE)
+#define VDSO_LIMIT		(_REGION2_SIZE)
 #define STACK_TOP		(VDSO_LIMIT - vdso_size() - PAGE_SIZE)
 #define STACK_TOP_MAX		(_REGION2_SIZE - vdso_size() - PAGE_SIZE)
 
@@ -181,7 +175,6 @@ struct thread_struct {
 	unsigned long system_timer;		/* task cputime in kernel space */
 	unsigned long hardirq_timer;		/* task cputime in hardirq context */
 	unsigned long softirq_timer;		/* task cputime in softirq context */
-	const sys_call_ptr_t *sys_call_table;	/* system call table address */
 	union teid gmap_teid;			/* address and flags of last gmap fault */
 	unsigned int gmap_int_code;		/* int code of last gmap fault */
 	int ufpu_flags;				/* user fpu flags */
@@ -379,14 +372,19 @@ static inline void local_mcck_enable(void)
 /*
  * Rewind PSW instruction address by specified number of bytes.
  */
-static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
+static inline unsigned long __rewind_psw(psw_t psw, long ilen)
 {
 	unsigned long mask;
 
 	mask = (psw.mask & PSW_MASK_EA) ? -1UL :
 	       (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
 					  (1UL << 24) - 1;
-	return (psw.addr - ilc) & mask;
+	return (psw.addr - ilen) & mask;
+}
+
+static inline unsigned long __forward_psw(psw_t psw, long ilen)
+{
+	return __rewind_psw(psw, -ilen);
 }
 
 /*