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-rw-r--r--mm/vmscan.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3886b0bd7869..f51a33e8ed89 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -633,13 +633,14 @@ redo:
lru = LRU_UNEVICTABLE;
add_page_to_unevictable_list(page);
/*
- * When racing with an mlock clearing (page is
- * unlocked), make sure that if the other thread does
- * not observe our setting of PG_lru and fails
- * isolation, we see PG_mlocked cleared below and move
+ * When racing with an mlock or AS_UNEVICTABLE clearing
+ * (page is unlocked) make sure that if the other thread
+ * does not observe our setting of PG_lru and fails
+ * isolation/check_move_unevictable_page,
+ * we see PG_mlocked/AS_UNEVICTABLE cleared below and move
* the page back to the evictable list.
*
- * The other side is TestClearPageMlocked().
+ * The other side is TestClearPageMlocked() or shmem_lock().
*/
smp_mb();
}