1 files changed, 3 insertions, 0 deletions

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 378b0f61fd3c..6b44e52cacaa 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1298,6 +1298,9 @@ done:
         return ret;
 }
 
+/*
+ * The caller must hold current->mm->mmap_sem in read mode.
+ */
 int is_hwpoison_address(unsigned long addr)
 {
         pgd_t *pgdp;