From 9d8f0bcca6ffa024a822ce4ab1008ab663f06672 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 7 Oct 2014 08:45:21 -0600
Subject: [PATCH] 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>
---
block/blk-mq-tag.c | 7 ++-----
1 file 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;
}
}
--
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