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authorWang Shilong <wangsl-fnst@cn.fujitsu.com>2013-01-12 13:36:17 +0400
committerJan Kara <jack@suse.cz>2013-01-21 14:19:57 +0400
commit1b7d76e9b1106f2be062f915b05d47658dd4fc63 (patch)
tree986543d21d3b870c54bd9e3280c7ec85fc4384db /fs/ext3/resize.c
parent2b0542a4a0d9b8cb98e64fc87c5e31d130029a92 (diff)
downloadlinux-1b7d76e9b1106f2be062f915b05d47658dd4fc63.tar.xz
Ext3: 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 check it. Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext3/resize.c')
-rw-r--r--fs/ext3/resize.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c
index 0f814f3450de..704e8ce7d782 100644
--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -116,7 +116,7 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
int err;
bh = sb_getblk(sb, blk);
- if (!bh)
+ if (unlikely(!bh))
return ERR_PTR(-EIO);
if ((err = ext3_journal_get_write_access(handle, bh))) {
brelse(bh);
@@ -234,7 +234,7 @@ static int setup_new_group_blocks(struct super_block *sb,
goto exit_bh;
gdb = sb_getblk(sb, block);
- if (!gdb) {
+ if (unlikely(!gdb)) {
err = -EIO;
goto exit_bh;
}
@@ -722,7 +722,7 @@ static void update_backups(struct super_block *sb,
break;
bh = sb_getblk(sb, group * bpg + blk_off);
- if (!bh) {
+ if (unlikely(!bh)) {
err = -EIO;
break;
}