Avoid uninitialized variant compile warning

When we compile btrfs-progs in RHEL5(with default gcc version 4.1.2 20070626),
we can get following error:

cc1: warnings being treated as errors
btrfs-list.c: In function 'find_updated_files':
btrfs-list.c:668: warning: 'disk_offset' may be used uninitialized in this function
btrfs-list.c:667: warning: 'disk_start' may be used uninitialized in this function
btrfs-list.c:666: warning: 'len' may be used uninitialized in this function
make: *** [btrfs-list.o] Error 1

These varient are always initialized except inconsistent data in file system.
We can set initial value for these variant for this situation.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>

diff --git a/btrfs-list.c b/btrfs-list.c
index 9dedb5d..112bed2 100644 (file)
--- a/btrfs-list.c
+++ b/btrfs-list.c
@@ -663,9 +663,9 @@ static int print_one_extent(int fd, struct btrfs_ioctl_search_header *sh,
                            char **cache_dir_name, u64 *cache_ino,
                            char **cache_full_name)
 {
-       u64 len;
-       u64 disk_start;
-       u64 disk_offset;
+       u64 len = 0;
+       u64 disk_start = 0;
+       u64 disk_offset = 0;
        u8 type;
        int compressed = 0;
        int flags = 0;