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authorAustin Kim <austindh.kim@gmail.com>2019-09-03 12:30:19 +0900
committerDavid Sterba <dsterba@suse.com>2019-10-08 13:14:55 +0200
commit431d39887d6273d6d84edf3c2eab09f4200e788a (patch)
tree4381cdf00dbe5ba98f62c6080626a2f0c56632cb /fs/btrfs
parentc5f4987e86f6692fdb12533ea1fc7a7bb98e555a (diff)
downloadlinux-431d39887d6273d6d84edf3c2eab09f4200e788a.tar.bz2
btrfs: silence maybe-uninitialized warning in clone_range
GCC throws warning message as below: ‘clone_src_i_size’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) ^ fs/btrfs/send.c:5088:6: note: ‘clone_src_i_size’ was declared here u64 clone_src_i_size; ^ The clone_src_i_size is only used as call-by-reference in a call to get_inode_info(). Silence the warning by initializing clone_src_i_size to 0. Note that the warning is a false positive and reported by older versions of GCC (eg. 7.x) but not eg 9.x. As there have been numerous people, the patch is applied. Setting clone_src_i_size to 0 does not otherwise make sense and would not do any action in case the code changes in the future. Signed-off-by: Austin Kim <austindh.kim@gmail.com> Reviewed-by: David Sterba <dsterba@suse.com> [ add note ] Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/send.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index f3215028235c..123ac54af071 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -5085,7 +5085,7 @@ static int clone_range(struct send_ctx *sctx,
struct btrfs_path *path;
struct btrfs_key key;
int ret;
- u64 clone_src_i_size;
+ u64 clone_src_i_size = 0;
/*
* Prevent cloning from a zero offset with a length matching the sector