Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "hung_task: extend blocking task stacktrace dump to semaphore" from
   Lance Yang enhances the hung task detector.

   The detector presently dumps the blocking tasks's stack when it is
   blocked on a mutex. Lance's series extends this to semaphores

 - "nilfs2: improve sanity checks in dirty state propagation" from
   Wentao Liang addresses a couple of minor flaws in nilfs2

 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn
   fixes a couple of issues in the gdb scripts

 - "Support kdump with LUKS encryption by reusing LUKS volume keys" from
   Coiby Xu addresses a usability problem with kdump.

   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem. A full writeup of this is in
   the series [0/N] cover letter

 - "sysfs: add counters for lockups and stalls" from Max Kellermann adds
   /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and
   /sys/kernel/rcu_stall_count

 - "fork: Page operation cleanups in the fork code" from Pasha Tatashin
   implements a number of code cleanups in fork.c

 - "scripts/gdb/symbols: determine KASLR offset on s390 during early
   boot" from Ilya Leoshkevich fixes some s390 issues in the gdb
   scripts

* tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits)
  llist: make llist_add_batch() a static inline
  delayacct: remove redundant code and adjust indentation
  squashfs: add optional full compressed block caching
  crash_dump, nvme: select CONFIGFS_FS as built-in
  scripts/gdb/symbols: determine KASLR offset on s390 during early boot
  scripts/gdb/symbols: factor out pagination_off()
  scripts/gdb/symbols: factor out get_vmlinux()
  kernel/panic.c: format kernel-doc comments
  mailmap: update and consolidate Casey Connolly's name and email
  nilfs2: remove wbc->for_reclaim handling
  fork: define a local GFP_VMAP_STACK
  fork: check charging success before zeroing stack
  fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code
  fork: clean-up ifdef logic around stack allocation
  kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count
  kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count
  x86/crash: make the page that stores the dm crypt keys inaccessible
  x86/crash: pass dm crypt keys to kdump kernel
  Revert "x86/mm: Remove unused __set_memory_prot()"
  crash_dump: retrieve dm crypt keys in kdump kernel
  ...

12 files changed, 102 insertions, 72 deletions

diff --git a/Documentation/ABI/testing/sysfs-kernel-hardlockup_count b/Documentation/ABI/testing/sysfs-kernel-hardlockup_count
new file mode 100644
index 000000000000..dfdd4078b077
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-hardlockup_count
@@ -0,0 +1,7 @@
+What:		/sys/kernel/hardlockup_count
+Date:		May 2025
+KernelVersion:	6.16
+Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+		Shows how many times the system has detected a hard lockup since last boot.
+		Available only if CONFIG_HARDLOCKUP_DETECTOR is enabled.
diff --git a/Documentation/ABI/testing/sysfs-kernel-rcu_stall_count b/Documentation/ABI/testing/sysfs-kernel-rcu_stall_count
new file mode 100644
index 000000000000..a4a97a7f4a4d
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-rcu_stall_count
@@ -0,0 +1,6 @@
+What:		/sys/kernel/rcu_stall_count
+Date:		May 2025
+KernelVersion:	6.16
+Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+		Shows how many times the system has detected an RCU stall since last boot.
diff --git a/Documentation/ABI/testing/sysfs-kernel-softlockup_count b/Documentation/ABI/testing/sysfs-kernel-softlockup_count
new file mode 100644
index 000000000000..337ff5531b5f
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-softlockup_count
@@ -0,0 +1,7 @@
+What:		/sys/kernel/softlockup_count
+Date:		May 2025
+KernelVersion:	6.16
+Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+		Shows how many times the system has detected a soft lockup since last boot.
+		Available only if CONFIG_SOFTLOCKUP_DETECTOR is enabled.
diff --git a/Documentation/admin-guide/kdump/kdump.rst b/Documentation/admin-guide/kdump/kdump.rst
index 1f7f14c6e184..20fabdf6567e 100644
--- a/Documentation/admin-guide/kdump/kdump.rst
+++ b/Documentation/admin-guide/kdump/kdump.rst
@@ -547,6 +547,38 @@ from within add_taint() whenever the value set in this bitmask matches with the
 bit flag being set by add_taint().
 This will cause a kdump to occur at the add_taint()->panic() call.
 
+Write the dump file to encrypted disk volume
+============================================
+
+CONFIG_CRASH_DM_CRYPT can be enabled to support saving the dump file to an
+encrypted disk volume (only x86_64 supported for now). User space can interact
+with /sys/kernel/config/crash_dm_crypt_keys for setup,
+
+1. Tell the first kernel what logon keys are needed to unlock the disk volumes,
+    # Add key #1
+    mkdir /sys/kernel/config/crash_dm_crypt_keys/7d26b7b4-e342-4d2d-b660-7426b0996720
+    # Add key #1's description
+    echo cryptsetup:7d26b7b4-e342-4d2d-b660-7426b0996720 > /sys/kernel/config/crash_dm_crypt_keys/description
+
+    # how many keys do we have now?
+    cat /sys/kernel/config/crash_dm_crypt_keys/count
+    1
+
+    # Add key #2 in the same way
+
+    # how many keys do we have now?
+    cat /sys/kernel/config/crash_dm_crypt_keys/count
+    2
+
+    # To support CPU/memory hot-plugging, re-use keys already saved to reserved
+    # memory
+    echo true > /sys/kernel/config/crash_dm_crypt_key/reuse
+
+2. Load the dump-capture kernel
+
+3. After the dump-capture kerne get booted, restore the keys to user keyring
+   echo yes > /sys/kernel/crash_dm_crypt_keys/restore
+
 Contact
 =======
 
diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst
index 0f714fc945ac..8cf4614385b7 100644
--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst
+++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -331,8 +331,8 @@ PG_lru|PG_private|PG_swapcache|PG_swapbacked|PG_slab|PG_hwpoision|PG_head_mask|P
 Page attributes. These flags are used to filter various unnecessary for
 dumping pages.
 
-PAGE_BUDDY_MAPCOUNT_VALUE(~PG_buddy)|PAGE_OFFLINE_MAPCOUNT_VALUE(~PG_offline)
------------------------------------------------------------------------------
+PAGE_BUDDY_MAPCOUNT_VALUE(~PG_buddy)|PAGE_OFFLINE_MAPCOUNT_VALUE(~PG_offline)|PAGE_OFFLINE_MAPCOUNT_VALUE(~PG_unaccepted)
+-------------------------------------------------------------------------------------------------------------------------
 
 More page attributes. These flags are used to filter various unnecessary for
 dumping pages.
diff --git a/Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml b/Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml
index bbaaa783d184..2219d3d4ac43 100644
--- a/Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml
+++ b/Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: LG SW43408 1080x2160 DSI panel
 
 maintainers:
-  - Caleb Connolly <caleb.connolly@linaro.org>
+  - Casey Connolly <casey.connolly@linaro.org>
 
 description:
   This panel is used on the Pixel 3, it is a 60hz OLED panel which
diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-rradc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-rradc.yaml
index f39bc92c2b99..862e450da214 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-rradc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-rradc.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Qualcomm's SPMI PMIC Round Robin ADC
 
 maintainers:
-  - Caleb Connolly <caleb.connolly@linaro.org>
+  - Casey Connolly <casey.connolly@linaro.org>
 
 description: |
   The Qualcomm SPMI Round Robin ADC (RRADC) provides interface to clients to
diff --git a/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml b/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
index a0f9d49ff8fb..90c7dc7632c5 100644
--- a/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
+++ b/Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Qualcomm PMI8998/PM660 Switch-Mode Battery Charger "2"
 
 maintainers:
-  - Caleb Connolly <caleb.connolly@linaro.org>
+  - Casey Connolly <casey.connolly@linaro.org>
 
 properties:
   compatible:
diff --git a/Documentation/filesystems/relay.rst b/Documentation/filesystems/relay.rst
index 46447dbc75ad..301ff4c6e6c6 100644
--- a/Documentation/filesystems/relay.rst
+++ b/Documentation/filesystems/relay.rst
@@ -301,16 +301,6 @@ user-defined data with a channel, and is immediately available
 (including in create_buf_file()) via chan->private_data or
 buf->chan->private_data.
 
-Buffer-only channels
---------------------
-
-These channels have no files associated and can be created with
-relay_open(NULL, NULL, ...). Such channels are useful in scenarios such
-as when doing early tracing in the kernel, before the VFS is up. In these
-cases, one may open a buffer-only channel and then call
-relay_late_setup_files() when the kernel is ready to handle files,
-to expose the buffered data to the userspace.
-
 Channel 'modes'
 ---------------
 
diff --git a/Documentation/process/debugging/gdb-kernel-debugging.rst b/Documentation/process/debugging/gdb-kernel-debugging.rst
index 895285c037c7..9475c759c722 100644
--- a/Documentation/process/debugging/gdb-kernel-debugging.rst
+++ b/Documentation/process/debugging/gdb-kernel-debugging.rst
@@ -127,35 +127,31 @@ Examples of using the Linux-provided gdb helpers
 
 - Make use of the per-cpu function for the current or a specified CPU::
 
-    (gdb) p $lx_per_cpu("runqueues").nr_running
+    (gdb) p $lx_per_cpu(runqueues).nr_running
     $3 = 1
-    (gdb) p $lx_per_cpu("runqueues", 2).nr_running
+    (gdb) p $lx_per_cpu(runqueues, 2).nr_running
     $4 = 0
 
 - Dig into hrtimers using the container_of helper::
 
-    (gdb) set $next = $lx_per_cpu("hrtimer_bases").clock_base[0].active.next
-    (gdb) p *$container_of($next, "struct hrtimer", "node")
+    (gdb) set $leftmost = $lx_per_cpu(hrtimer_bases).clock_base[0].active.rb_root.rb_leftmost
+    (gdb) p *$container_of($leftmost, "struct hrtimer", "node")
     $5 = {
       node = {
         node = {
-          __rb_parent_color = 18446612133355256072,
-          rb_right = 0x0 <irq_stack_union>,
-          rb_left = 0x0 <irq_stack_union>
+          __rb_parent_color = 18446612686384860673,
+          rb_right = 0xffff888231da8b00,
+          rb_left = 0x0
         },
-        expires = {
-          tv64 = 1835268000000
-        }
+        expires = 1228461000000
       },
-      _softexpires = {
-        tv64 = 1835268000000
-      },
-      function = 0xffffffff81078232 <tick_sched_timer>,
-      base = 0xffff88003fd0d6f0,
-      state = 1,
-      start_pid = 0,
-      start_site = 0xffffffff81055c1f <hrtimer_start_range_ns+20>,
-      start_comm = "swapper/2\000\000\000\000\000\000"
+      _softexpires = 1228461000000,
+      function = 0xffffffff8137ab20 <tick_nohz_handler>,
+      base = 0xffff888231d9b4c0,
+      state = 1 '\001',
+      is_rel = 0 '\000',
+      is_soft = 0 '\000',
+      is_hard = 1 '\001'
     }
 
 
diff --git a/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
index 3c133a918f30..282aacd33442 100644
--- a/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
+++ b/Documentation/translations/zh_CN/dev-tools/gdb-kernel-debugging.rst
@@ -120,35 +120,31 @@ Kgdb内核调试器、QEMU等虚拟机管理程序或基于JTAG的硬件接口�
 
 - 对当前或指定的CPU使用per-cpu函数::
 
-    (gdb) p $lx_per_cpu("runqueues").nr_running
+    (gdb) p $lx_per_cpu(runqueues).nr_running
     $3 = 1
-    (gdb) p $lx_per_cpu("runqueues", 2).nr_running
+    (gdb) p $lx_per_cpu(runqueues, 2).nr_running
     $4 = 0
 
 - 使用container_of查看更多hrtimers信息::
 
-    (gdb) set $next = $lx_per_cpu("hrtimer_bases").clock_base[0].active.next
-    (gdb) p *$container_of($next, "struct hrtimer", "node")
+    (gdb) set $leftmost = $lx_per_cpu(hrtimer_bases).clock_base[0].active.rb_root.rb_leftmost
+    (gdb) p *$container_of($leftmost, "struct hrtimer", "node")
     $5 = {
       node = {
         node = {
-          __rb_parent_color = 18446612133355256072,
-          rb_right = 0x0 <irq_stack_union>,
-          rb_left = 0x0 <irq_stack_union>
+          __rb_parent_color = 18446612686384860673,
+          rb_right = 0xffff888231da8b00,
+          rb_left = 0x0
         },
-        expires = {
-          tv64 = 1835268000000
-        }
+        expires = 1228461000000
       },
-      _softexpires = {
-        tv64 = 1835268000000
-      },
-      function = 0xffffffff81078232 <tick_sched_timer>,
-      base = 0xffff88003fd0d6f0,
-      state = 1,
-      start_pid = 0,
-      start_site = 0xffffffff81055c1f <hrtimer_start_range_ns+20>,
-      start_comm = "swapper/2\000\000\000\000\000\000"
+      _softexpires = 1228461000000,
+      function = 0xffffffff8137ab20 <tick_nohz_handler>,
+      base = 0xffff888231d9b4c0,
+      state = 1 '\001',
+      is_rel = 0 '\000',
+      is_soft = 0 '\000',
+      is_hard = 1 '\001'
     }
 
 
diff --git a/Documentation/translations/zh_TW/dev-tools/gdb-kernel-debugging.rst b/Documentation/translations/zh_TW/dev-tools/gdb-kernel-debugging.rst
index c881e8872b19..b595af59ba78 100644
--- a/Documentation/translations/zh_TW/dev-tools/gdb-kernel-debugging.rst
+++ b/Documentation/translations/zh_TW/dev-tools/gdb-kernel-debugging.rst
@@ -116,35 +116,31 @@ Kgdb內核調試器、QEMU等虛擬機管理程序或基於JTAG的硬件接口�
 
 - 對當前或指定的CPU使用per-cpu函數::
 
-    (gdb) p $lx_per_cpu("runqueues").nr_running
+    (gdb) p $lx_per_cpu(runqueues).nr_running
     $3 = 1
-    (gdb) p $lx_per_cpu("runqueues", 2).nr_running
+    (gdb) p $lx_per_cpu(runqueues, 2).nr_running
     $4 = 0
 
 - 使用container_of查看更多hrtimers信息::
 
-    (gdb) set $next = $lx_per_cpu("hrtimer_bases").clock_base[0].active.next
-    (gdb) p *$container_of($next, "struct hrtimer", "node")
+    (gdb) set $leftmost = $lx_per_cpu(hrtimer_bases).clock_base[0].active.rb_root.rb_leftmost
+    (gdb) p *$container_of($leftmost, "struct hrtimer", "node")
     $5 = {
       node = {
         node = {
-          __rb_parent_color = 18446612133355256072,
-          rb_right = 0x0 <irq_stack_union>,
-          rb_left = 0x0 <irq_stack_union>
+          __rb_parent_color = 18446612686384860673,
+          rb_right = 0xffff888231da8b00,
+          rb_left = 0x0
         },
-        expires = {
-          tv64 = 1835268000000
-        }
+        expires = 1228461000000
       },
-      _softexpires = {
-        tv64 = 1835268000000
-      },
-      function = 0xffffffff81078232 <tick_sched_timer>,
-      base = 0xffff88003fd0d6f0,
-      state = 1,
-      start_pid = 0,
-      start_site = 0xffffffff81055c1f <hrtimer_start_range_ns+20>,
-      start_comm = "swapper/2\000\000\000\000\000\000"
+      _softexpires = 1228461000000,
+      function = 0xffffffff8137ab20 <tick_nohz_handler>,
+      base = 0xffff888231d9b4c0,
+      state = 1 '\001',
+      is_rel = 0 '\000',
+      is_soft = 0 '\000',
+      is_hard = 1 '\001'
     }