[PATCH v2] btrfs/extent_map: Remove unneeded variable "ret"

From: zhong jiang
Date: Sun Aug 05 2018 - 09:16:39 EST


The ret is not used after initalization, and we do not care about
the return value. So make it void function.

Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx>
---
fs/btrfs/extent_map.c | 10 ++--------
fs/btrfs/extent_map.h | 4 ++--
2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 6648d55..da4e4f3 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -273,10 +273,9 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
* to the generation that actually added the file item to the inode so we know
* we need to sync this extent when we call fsync().
*/
-int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
+void unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
u64 gen)
{
- int ret = 0;
struct extent_map *em;
bool prealloc = false;

@@ -308,8 +307,6 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
free_extent_map(em);
out:
write_unlock(&tree->lock);
- return ret;
-
}

void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)
@@ -428,16 +425,13 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
* Removes @em from @tree. No reference counts are dropped, and no checks
* are done to see if the range is in use
*/
-int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
+void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
{
- int ret = 0;
-
WARN_ON(test_bit(EXTENT_FLAG_PINNED, &em->flags));
rb_erase(&em->rb_node, &tree->map);
if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
list_del_init(&em->list);
RB_CLEAR_NODE(&em->rb_node);
- return ret;
}

void replace_extent_mapping(struct extent_map_tree *tree,
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 25d985e..c80649b 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -78,7 +78,7 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *em, int modified);
-int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
+void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
void replace_extent_mapping(struct extent_map_tree *tree,
struct extent_map *cur,
struct extent_map *new,
@@ -88,7 +88,7 @@ void replace_extent_mapping(struct extent_map_tree *tree,
void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void __cold extent_map_exit(void);
-int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
+void unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
--
1.7.12.4