Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves
   disk space by teaching ocfs2 to reclaim suballocator block group
   space (Heming Zhao)

 - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the
   ARRAY_END() macro and uses it in various places (Alejandro Colomar)

 - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes
   the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the
   page size (Pnina Feder)

 - "kallsyms: Prevent invalid access when showing module buildid" cleans
   up kallsyms code related to module buildid and fixes an invalid
   access crash when printing backtraces (Petr Mladek)

 - "Address page fault in ima_restore_measurement_list()" fixes a
   kexec-related crash that can occur when booting the second-stage
   kernel on x86 (Harshit Mogalapalli)

 - "kho: ABI headers and Documentation updates" updates the kexec
   handover ABI documentation (Mike Rapoport)

 - "Align atomic storage" adds the __aligned attribute to atomic_t and
   atomic64_t definitions to get natural alignment of both types on
   csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain)

 - "kho: clean up page initialization logic" simplifies the page
   initialization logic in kho_restore_page() (Pratyush Yadav)

 - "Unload linux/kernel.h" moves several things out of kernel.h and into
   more appropriate places (Yury Norov)

 - "don't abuse task_struct.group_leader" removes the usage of
   ->group_leader when it is "obviously unnecessary" (Oleg Nesterov)

 - "list private v2 & luo flb" adds some infrastructure improvements to
   the live update orchestrator (Pasha Tatashin)

* tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits)
  watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency
  procfs: fix missing RCU protection when reading real_parent in do_task_stat()
  watchdog/softlockup: fix sample ring index wrap in need_counting_irqs()
  kcsan, compiler_types: avoid duplicate type issues in BPF Type Format
  kho: fix doc for kho_restore_pages()
  tests/liveupdate: add in-kernel liveupdate test
  liveupdate: luo_flb: introduce File-Lifecycle-Bound global state
  liveupdate: luo_file: Use private list
  list: add kunit test for private list primitives
  list: add primitives for private list manipulations
  delayacct: fix uapi timespec64 definition
  panic: add panic_force_cpu= parameter to redirect panic to a specific CPU
  netclassid: use thread_group_leader(p) in update_classid_task()
  RDMA/umem: don't abuse current->group_leader
  drm/pan*: don't abuse current->group_leader
  drm/amd: kill the outdated "Only the pthreads threading model is supported" checks
  drm/amdgpu: don't abuse current->group_leader
  android/binder: use same_thread_group(proc->tsk, current) in binder_mmap()
  android/binder: don't abuse current->group_leader
  kho: skip memoryless NUMA nodes when reserving scratch areas
  ...

4 files changed, 16 insertions, 4 deletions

diff --git a/fs/fat/cache.c b/fs/fat/cache.c
index 630f3056658e..1b87354e24ba 100644
--- a/fs/fat/cache.c
+++ b/fs/fat/cache.c
@@ -54,7 +54,7 @@ void fat_cache_destroy(void)
 	kmem_cache_destroy(fat_cache_cachep);
 }
 
-static inline struct fat_cache *fat_cache_alloc(struct inode *inode)
+static inline struct fat_cache *fat_cache_alloc(void)
 {
 	return kmem_cache_alloc(fat_cache_cachep, GFP_NOFS);
 }
@@ -144,7 +144,7 @@ static void fat_cache_add(struct inode *inode, struct fat_cache_id *new)
 			MSDOS_I(inode)->nr_caches++;
 			spin_unlock(&MSDOS_I(inode)->cache_lru_lock);
 
-			tmp = fat_cache_alloc(inode);
+			tmp = fat_cache_alloc();
 			if (!tmp) {
 				spin_lock(&MSDOS_I(inode)->cache_lru_lock);
 				MSDOS_I(inode)->nr_caches--;
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 07d95f1442c8..4b8b25f688e4 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -17,6 +17,7 @@
 #include <linux/slab.h>
 #include <linux/compat.h>
 #include <linux/filelock.h>
+#include <linux/hex.h>
 #include <linux/uaccess.h>
 #include <linux/iversion.h>
 #include "fat.h"
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index ba0152ed0810..048c103b506a 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -325,7 +325,12 @@ static int msdos_rmdir(struct inode *dir, struct dentry *dentry)
 	err = fat_remove_entries(dir, &sinfo);	/* and releases bh */
 	if (err)
 		goto out;
-	drop_nlink(dir);
+	if (dir->i_nlink >= 3)
+		drop_nlink(dir);
+	else {
+		fat_fs_error(sb, "parent dir link count too low (%u)",
+			dir->i_nlink);
+	}
 
 	clear_nlink(inode);
 	fat_detach(inode);
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index e46f34cade1a..2acfe3123a72 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -20,6 +20,7 @@
 #include <linux/ctype.h>
 #include <linux/slab.h>
 #include <linux/namei.h>
+#include <linux/hex.h>
 #include <linux/kernel.h>
 #include <linux/iversion.h>
 #include "fat.h"
@@ -803,7 +804,12 @@ static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
 	err = fat_remove_entries(dir, &sinfo);	/* and releases bh */
 	if (err)
 		goto out;
-	drop_nlink(dir);
+	if (dir->i_nlink >= 3)
+		drop_nlink(dir);
+	else {
+		fat_fs_error(sb, "parent dir link count too low (%u)",
+			dir->i_nlink);
+	}
 
 	clear_nlink(inode);
 	fat_truncate_time(inode, NULL, FAT_UPDATE_ATIME | FAT_UPDATE_CMTIME);