set_extent_bit()''s (u64 *failed_start) expects NULL not 0.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/extent_io.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index f173c5a..f22243f 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1189,7 +1189,7 @@ int set_extent_new(struct extent_io_tree *tree, u64 start,
u64 end,
 int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
 			struct extent_state **cached_state, gfp_t mask)
 {
-	return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0,
+	return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
 			      cached_state, mask);
 }
 
-- 
1.7.7.6
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