Merge tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:
 "As usual, lots of singleton and doubleton patches all over the tree
  and there's little I can say which isn't in the individual changelogs.

  The lengthier patch series are

   - 'kdump: use generic functions to simplify crashkernel reservation
     in arch', from Baoquan He. This is mainly cleanups and
     consolidation of the 'crashkernel=' kernel parameter handling

   - After much discussion, David Laight's 'minmax: Relax type checks in
     min() and max()' is here. Hopefully reduces some typecasting and
     the use of min_t() and max_t()

   - A group of patches from Oleg Nesterov which clean up and slightly
     fix our handling of reads from /proc/PID/task/... and which remove
     task_struct.thread_group"

* tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (64 commits)
  scripts/gdb/vmalloc: disable on no-MMU
  scripts/gdb: fix usage of MOD_TEXT not defined when CONFIG_MODULES=n
  .mailmap: add address mapping for Tomeu Vizoso
  mailmap: update email address for Claudiu Beznea
  tools/testing/selftests/mm/run_vmtests.sh: lower the ptrace permissions
  .mailmap: map Benjamin Poirier's address
  scripts/gdb: add lx_current support for riscv
  ocfs2: fix a spelling typo in comment
  proc: test ProtectionKey in proc-empty-vm test
  proc: fix proc-empty-vm test with vsyscall
  fs/proc/base.c: remove unneeded semicolon
  do_io_accounting: use sig->stats_lock
  do_io_accounting: use __for_each_thread()
  ocfs2: replace BUG_ON() at ocfs2_num_free_extents() with ocfs2_error()
  ocfs2: fix a typo in a comment
  scripts/show_delta: add __main__ judgement before main code
  treewide: mark stuff as __ro_after_init
  fs: ocfs2: check status values
  proc: test /proc/${pid}/statm
  compiler.h: move __is_constexpr() to compiler.h
  ...

3 files changed, 6 insertions, 7 deletions

diff --git a/mm/damon/core.c b/mm/damon/core.c
index aa2dc7087cd9..630077d95dc6 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -735,8 +735,7 @@ static int __damon_stop(struct damon_ctx *ctx)
 	if (tsk) {
 		get_task_struct(tsk);
 		mutex_unlock(&ctx->kdamond_lock);
-		kthread_stop(tsk);
-		put_task_struct(tsk);
+		kthread_stop_put(tsk);
 		return 0;
 	}
 	mutex_unlock(&ctx->kdamond_lock);
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index bc2d8ff269c7..064654717843 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -91,7 +91,7 @@ static unsigned int khugepaged_max_ptes_shared __read_mostly;
 #define MM_SLOTS_HASH_BITS 10
 static DEFINE_READ_MOSTLY_HASHTABLE(mm_slots_hash, MM_SLOTS_HASH_BITS);
 
-static struct kmem_cache *mm_slot_cache __read_mostly;
+static struct kmem_cache *mm_slot_cache __ro_after_init;
 
 struct collapse_control {
 	bool is_khugepaged;
diff --git a/mm/shmem.c b/mm/shmem.c
index 71b8d957b63b..91e2620148b2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -42,7 +42,7 @@
 #include <linux/iversion.h>
 #include "swap.h"
 
-static struct vfsmount *shm_mnt;
+static struct vfsmount *shm_mnt __ro_after_init;
 
 #ifdef CONFIG_SHMEM
 /*
@@ -4400,7 +4400,7 @@ static const struct fs_context_operations shmem_fs_context_ops = {
 #endif
 };
 
-static struct kmem_cache *shmem_inode_cachep;
+static struct kmem_cache *shmem_inode_cachep __ro_after_init;
 
 static struct inode *shmem_alloc_inode(struct super_block *sb)
 {
@@ -4432,14 +4432,14 @@ static void shmem_init_inode(void *foo)
 	inode_init_once(&info->vfs_inode);
 }
 
-static void shmem_init_inodecache(void)
+static void __init shmem_init_inodecache(void)
 {
 	shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
 				sizeof(struct shmem_inode_info),
 				0, SLAB_PANIC|SLAB_ACCOUNT, shmem_init_inode);
 }
 
-static void shmem_destroy_inodecache(void)
+static void __init shmem_destroy_inodecache(void)
 {
 	kmem_cache_destroy(shmem_inode_cachep);
 }