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authorZhao Lei <zhaolei@cn.fujitsu.com>2015-01-20 10:11:37 +0300
committerChris Mason <clm@fb.com>2015-01-22 05:06:48 +0300
commit09dd7a01c3436344fb4c3974b275e016264e0a27 (patch)
tree29176271e21e7331530408bd2f5cfae7bf88f935 /fs/btrfs/dev-replace.c
parent114ab50d823c2cc7cf60658fdbdaaba413009921 (diff)
downloadlinux-09dd7a01c3436344fb4c3974b275e016264e0a27.tar.xz
Btrfs: Cleanup btrfs_bio_counter_inc_blocked()
1: Remove no-need DEFINE_WAIT(wait) 2: Add likely() for BTRFS_FS_STATE_DEV_REPLACING condition 3: Use while loop instead of goto Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
-rw-r--r--fs/btrfs/dev-replace.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index ca6a3a3b6b6c..92109b7c865c 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -932,15 +932,15 @@ void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount)
void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info)
{
- DEFINE_WAIT(wait);
-again:
- percpu_counter_inc(&fs_info->bio_counter);
- if (test_bit(BTRFS_FS_STATE_DEV_REPLACING, &fs_info->fs_state)) {
+ while (1) {
+ percpu_counter_inc(&fs_info->bio_counter);
+ if (likely(!test_bit(BTRFS_FS_STATE_DEV_REPLACING,
+ &fs_info->fs_state)))
+ break;
+
btrfs_bio_counter_dec(fs_info);
wait_event(fs_info->replace_wait,
!test_bit(BTRFS_FS_STATE_DEV_REPLACING,
&fs_info->fs_state));
- goto again;
}
-
}