[PATCH] btrfs: remove unneeded variable ret

[Jason Wang]

The variable `ret' used for returning status in function
`unpin_extent_cache' is never changed. we can return 0
and remove the `ret' variable.

Signed-off-by: Jason Wang <wangborong@xxxxxxxxxx>
---
 fs/btrfs/extent_map.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 5a36add21305..ac432bed6052 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -296,7 +296,6 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
 int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
 		       u64 gen)
 {
-	int ret = 0;
 	struct extent_map *em;
 	bool prealloc = false;
 
@@ -328,8 +327,8 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
 	free_extent_map(em);
 out:
 	write_unlock(&tree->lock);
-	return ret;
 
+	return 0;
 }
 
 void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)
-- 
2.33.0