Merge branch 'mm-hotfixes-stable' into mm-stable to pick up "mm: fix

crashes from deferred split racing folio migration", needed by "mm:
migrate: split folio_migrate_mapping()".

1 files changed, 13 insertions, 2 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index d09c6bf1f28a..426b09d8cc55 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -548,8 +548,9 @@ static bool shmem_confirm_swap(struct address_space *mapping,
 
 static int shmem_huge __read_mostly = SHMEM_HUGE_NEVER;
 
-bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
-		   struct mm_struct *mm, unsigned long vm_flags)
+static bool __shmem_is_huge(struct inode *inode, pgoff_t index,
+			    bool shmem_huge_force, struct mm_struct *mm,
+			    unsigned long vm_flags)
 {
 	loff_t i_size;
 
@@ -580,6 +581,16 @@ bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
 	}
 }
 
+bool shmem_is_huge(struct inode *inode, pgoff_t index,
+		   bool shmem_huge_force, struct mm_struct *mm,
+		   unsigned long vm_flags)
+{
+	if (HPAGE_PMD_ORDER > MAX_PAGECACHE_ORDER)
+		return false;
+
+	return __shmem_is_huge(inode, index, shmem_huge_force, mm, vm_flags);
+}
+
 #if defined(CONFIG_SYSFS)
 static int shmem_parse_huge(const char *str)
 {