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btrfs: reflink: initialize return value to 0 in btrfs_extent_same()

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[ Upstream commit 44bee215f72f13874c0e734a0712c2e3264c0108 ]

Fix a warning reported by smatch that ret could be returned without
initialized.  The dedupe operations are supposed to to return 0 for a 0
length range but the caller does not pass olen == 0. To keep this
behaviour and also fix the warning initialize ret to 0.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Sidong Yang <realwakka@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sidong Yang 2021-08-26 14:44:36 +00:00 committed by Greg Kroah-Hartman
parent eeb96ebdc6
commit 428bb3d71e
1 changed files with 1 additions and 1 deletions
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fs/btrfs/reflink.c
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@ -634,7 +634,7 @@ static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len,
static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
struct inode *dst, u64 dst_loff)
{
int ret;
int ret = 0;
u64 i, tail_len, chunk_count;
struct btrfs_root *root_dst = BTRFS_I(dst)->root;