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-rw-r--r--mm/memory-failure.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 82e15baabb48..455093f73a70 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1704,7 +1704,7 @@ static void unmap_and_kill(struct list_head *to_kill, unsigned long pfn,
* mapping being torn down is communicated in siginfo, see
* kill_proc()
*/
- loff_t start = (index << PAGE_SHIFT) & ~(size - 1);
+ loff_t start = ((loff_t)index << PAGE_SHIFT) & ~(size - 1);
unmap_mapping_range(mapping, start, size, 0);
}