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authorBart Van Assche <bvanassche@acm.org>2014-10-07 08:45:21 -0600
committerJens Axboe <axboe@fb.com>2014-10-07 08:45:21 -0600
commit9d8f0bcca6ffa024a822ce4ab1008ab663f06672 (patch)
treea458e1fd409111a4afe142b7636ea3db5e413d04 /block/blk-mq-tag.c
parentabab13b5c4fd1fec4f9a61622548012d93dc2831 (diff)
downloadkernel-9d8f0bcca6ffa024a822ce4ab1008ab663f06672.tar.gz
blk-mq: Make bt_clear_tag() easier to read
Eliminate a backwards goto statement from bt_clear_tag(). Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-tag.c')
-rw-r--r--block/blk-mq-tag.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 146fd02659ec..8317175a3009 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -351,15 +351,12 @@ static void bt_clear_tag(struct blk_mq_bitmap_tags *bt, unsigned int tag)
return;
wait_cnt = atomic_dec_return(&bs->wait_cnt);
+ if (unlikely(wait_cnt < 0))
+ wait_cnt = atomic_inc_return(&bs->wait_cnt);
if (wait_cnt == 0) {
-wake:
atomic_add(bt->wake_cnt, &bs->wait_cnt);
bt_index_atomic_inc(&bt->wake_index);
wake_up(&bs->wait);
- } else if (wait_cnt < 0) {
- wait_cnt = atomic_inc_return(&bs->wait_cnt);
- if (!wait_cnt)
- goto wake;
}
}