Merge tag 'mm-hotfixes-stable-2022-11-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc hotfixes from Andrew Morton:
 "22 hotfixes.

  Eight are cc:stable and the remainder address issues which were
  introduced post-6.0 or which aren't considered serious enough to
  justify a -stable backport"

* tag 'mm-hotfixes-stable-2022-11-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (22 commits)
  docs: kmsan: fix formatting of "Example report"
  mm/damon/dbgfs: check if rm_contexts input is for a real context
  maple_tree: don't set a new maximum on the node when not reusing nodes
  maple_tree: fix depth tracking in maple_state
  arch/x86/mm/hugetlbpage.c: pud_huge() returns 0 when using 2-level paging
  fs: fix leaked psi pressure state
  nilfs2: fix use-after-free bug of ns_writer on remount
  x86/traps: avoid KMSAN bugs originating from handle_bug()
  kmsan: make sure PREEMPT_RT is off
  Kconfig.debug: ensure early check for KMSAN in CONFIG_KMSAN_WARN
  x86/uaccess: instrument copy_from_user_nmi()
  kmsan: core: kmsan_in_runtime() should return true in NMI context
  mm: hugetlb_vmemmap: include missing linux/moduleparam.h
  mm/shmem: use page_mapping() to detect page cache for uffd continue
  mm/memremap.c: map FS_DAX device memory as decrypted
  Partly revert "mm/thp: carry over dirty bit when thp splits on pmd"
  nilfs2: fix deadlock in nilfs_count_free_blocks()
  mm/mmap: fix memory leak in mmap_region()
  hugetlbfs: don't delete error page from pagecache
  maple_tree: reorganize testing to restore module testing
  ...

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index 2effab72add1..e594db58a0f1 100644
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -638,6 +638,12 @@ static inline void mt_set_in_rcu(struct maple_tree *mt)
 	}
 }
 
+static inline unsigned int mt_height(const struct maple_tree *mt)
+
+{
+	return (mt->ma_flags & MT_FLAGS_HEIGHT_MASK) >> MT_FLAGS_HEIGHT_OFFSET;
+}
+
 void *mt_find(struct maple_tree *mt, unsigned long *index, unsigned long max);
 void *mt_find_after(struct maple_tree *mt, unsigned long *index,
 		    unsigned long max);
@@ -664,6 +670,7 @@ extern atomic_t maple_tree_tests_passed;
 
 void mt_dump(const struct maple_tree *mt);
 void mt_validate(struct maple_tree *mt);
+void mt_cache_shrink(void);
 #define MT_BUG_ON(__tree, __x) do {					\
 	atomic_inc(&maple_tree_tests_run);				\
 	if (__x) {							\