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authorTejun Heo <tj@kernel.org>2014-07-01 10:33:02 -0600
committerJens Axboe <axboe@fb.com>2014-07-01 10:33:02 -0600
commit72d6f02a8d4e0dda74de3a541b1c4ae82f5f7b45 (patch)
tree63e27bc8021a69afa0ee10798aa340c7b0e35a60 /block
parent780db2071ac4d167ee4154ad9c96088f1bba044b (diff)
downloadop-kernel-dev-72d6f02a8d4e0dda74de3a541b1c4ae82f5f7b45.zip
op-kernel-dev-72d6f02a8d4e0dda74de3a541b1c4ae82f5f7b45.tar.gz
blk-mq: collapse __blk_mq_drain_queue() into blk_mq_freeze_queue()
Keeping __blk_mq_drain_queue() as a separate function doesn't buy us anything and it's gonna be further simplified. Let's flatten it into its caller. This patch doesn't make any functional change. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Nicholas A. Bellinger <nab@linux-iscsi.org> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c23
1 files changed, 9 insertions, 14 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1e324a1..22682fb 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -108,8 +108,16 @@ static void blk_mq_queue_exit(struct request_queue *q)
__percpu_counter_add(&q->mq_usage_counter, -1, 1000000);
}
-void blk_mq_drain_queue(struct request_queue *q)
+/*
+ * Guarantee no request is in use, so we can change any data structure of
+ * the queue afterward.
+ */
+void blk_mq_freeze_queue(struct request_queue *q)
{
+ spin_lock_irq(q->queue_lock);
+ q->mq_freeze_depth++;
+ spin_unlock_irq(q->queue_lock);
+
while (true) {
s64 count;
@@ -124,19 +132,6 @@ void blk_mq_drain_queue(struct request_queue *q)
}
}
-/*
- * Guarantee no request is in use, so we can change any data structure of
- * the queue afterward.
- */
-void blk_mq_freeze_queue(struct request_queue *q)
-{
- spin_lock_irq(q->queue_lock);
- q->mq_freeze_depth++;
- spin_unlock_irq(q->queue_lock);
-
- blk_mq_drain_queue(q);
-}
-
static void blk_mq_unfreeze_queue(struct request_queue *q)
{
bool wake = false;
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