Commit 44bee215 authored by Sidong Yang's avatar Sidong Yang Committed by David Sterba
Browse files

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



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: default avatarFilipe Manana <fdmanana@suse.com>
Signed-off-by: default avatarSidong Yang <realwakka@gmail.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 72a69cd0

fs/btrfs/reflink.c

+1 −1
Original line number Diff line number Diff line
@@ -649,7 +649,7 @@ 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;