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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>
This commit is contained in:
Zhao Lei 2015-01-20 15:11:37 +08:00 committed by Chris Mason
parent 114ab50d82
commit 09dd7a01c3
1 changed files with 6 additions and 6 deletions
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12
fs/btrfs/dev-replace.c
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@ -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;
}
}