• Austin Kim's avatar
    btrfs: silence maybe-uninitialized warning in clone_range · 431d3988
    Austin Kim authored
    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: default avatarAustin Kim <austindh.kim@gmail.com>
    Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
    [ add note ]
    Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
    431d3988
send.c 176 KB