[PATCH] ext4: mballoc: avoid garbage value from err

[Su Hui]

clang warning: fs/ext4/mballoc.c, line 4178, column 6
Branch condition evaluates to a garbage value.

err is uninitialized and will be judged when it enters the
loop first time and the condition "!ext4_sb_block_valid()"
is true. Although this can't make problems now, it's better
to correct it.

Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
 fs/ext4/mballoc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 21b903fe546e..769000c970b0 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4084,7 +4084,7 @@ void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	ext4_group_t group;
 	ext4_grpblk_t blkoff;
-	int i, err;
+	int i, err = 0;
 	int already;
 	unsigned int clen, clen_changed, thisgrp_len;
 
-- 
2.30.2