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
  ...

Author: torvalds

.mailmap

@@ -155,6 +155,9 @@ Brian King <[email protected]>
 Brian Silverman <[email protected]> <[email protected]>
 Bryan Tan <[email protected]> <[email protected]>
 Cai Huoqing <[email protected]> <[email protected]>
+Casey Connolly <[email protected]> <[email protected]>
+Casey Connolly <[email protected]> <[email protected]>
+Casey Connolly <[email protected]> <[email protected]>
 Can Guo <[email protected]> <[email protected]>
 Carl Huang <[email protected]> <[email protected]>
 Carlos Bilbao <[email protected]> <[email protected]>

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 <[email protected]>
+Description:
+		Shows how many times the system has detected a hard lockup since last boot.
+		Available only if CONFIG_HARDLOCKUP_DETECTOR is enabled.

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 <[email protected]>
+Description:
+		Shows how many times the system has detected an RCU stall since last boot.

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 <[email protected]>
+Description:
+		Shows how many times the system has detected a soft lockup since last boot.
+		Available only if CONFIG_SOFTLOCKUP_DETECTOR is enabled.

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
 =======
 

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.

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[email protected]>
+  - Casey Connolly <casey[email protected]>
 
 description:
   This panel is used on the Pixel 3, it is a 60hz OLED panel which

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[email protected]>
+  - Casey Connolly <casey[email protected]>
 
 description: |
   The Qualcomm SPMI Round Robin ADC (RRADC) provides interface to clients to

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[email protected]>
+  - Casey Connolly <casey[email protected]>
 
 properties:
   compatible:

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'
 ---------------