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| author | Wang Shilong <wangsl-fnst@cn.fujitsu.com> | 2013-01-12 22:28:47 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-01-12 22:28:47 +0100 |
| commit | aebf02430d25b6bd2b8542126fdcdb90e75a24b8 (patch) | |
| tree | 7f884e64b000d9bed3a59dd557b3075a2da4405d /fs/ext4/mmp.c | |
| parent | ext4: return ENOMEM if sb_getblk() fails (diff) | |
| download | linux-aebf02430d25b6bd2b8542126fdcdb90e75a24b8.tar.xz linux-aebf02430d25b6bd2b8542126fdcdb90e75a24b8.zip | |
ext4: use unlikely to improve the efficiency of the kernel
Because the function 'sb_getblk' seldomly fails to return NULL
value,it will be better to use 'unlikely' to optimize it.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mmp.c')
| -rw-r--r-- | fs/ext4/mmp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index 44734f1ca554..f9b551561d2c 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -93,7 +93,7 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh, *bh = NULL; } } - if (!*bh) { + if (unlikely(!*bh)) { ext4_warning(sb, "Error while reading MMP block %llu", mmp_block); return -EIO; |