[RESEND,v2,2/3] blk-mq: remove blk_freeze_queue

Commit Message

Jinlong Chen Oct. 30, 2022, 5:26 a.m. UTC

Nobody is calling blk_freeze_queue except its alias, so remove it.

Signed-off-by: Jinlong Chen <[e-mail]>
---
 block/blk-mq.c | 18 +-----------------
 block/blk.h    |  1 -
 2 files changed, 1 insertion(+), 18 deletions(-)

Comments

Christoph Hellwig Oct. 30, 2022, 7:38 a.m. UTC | #1

On Sun, Oct 30, 2022 at 01:26:45PM +0800, Jinlong Chen wrote:
> Nobody is calling blk_freeze_queue except its alias, so remove it.

So while we really do not need both names - the queue freezing is also
used for non-mq drivers, so the naming without the mq is actually the
slightly more correct one.  But for that it should also move out of
blk-mq.c, so I'm not really sure touching this right now is all that
helpful.

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 14c4165511b9..e0654a2e80b9 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -194,27 +194,11 @@  EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_wait_timeout);
  * Guarantee no request is in use, so we can change any data structure of
  * the queue afterward.
  */
-void blk_freeze_queue(struct request_queue *q)
+void blk_mq_freeze_queue(struct request_queue *q)
 {
-	/*
-	 * In the !blk_mq case we are only calling this to kill the
-	 * q_usage_counter, otherwise this increases the freeze depth
-	 * and waits for it to return to zero.  For this reason there is
-	 * no blk_unfreeze_queue(), and blk_freeze_queue() is not
-	 * exported to drivers as the only user for unfreeze is blk_mq.
-	 */
 	blk_freeze_queue_start(q);
 	blk_mq_freeze_queue_wait(q);
 }
-
-void blk_mq_freeze_queue(struct request_queue *q)
-{
-	/*
-	 * ...just an alias to keep freeze and unfreeze actions balanced
-	 * in the blk_mq_* namespace
-	 */
-	blk_freeze_queue(q);
-}
 EXPORT_SYMBOL_GPL(blk_mq_freeze_queue);
 
 void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic)
diff --git a/block/blk.h b/block/blk.h
index 7f9e089ab1f7..e9addea2838a 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -37,7 +37,6 @@  struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
 					      gfp_t flags);
 void blk_free_flush_queue(struct blk_flush_queue *q);
 
-void blk_freeze_queue(struct request_queue *q);
 void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic);
 void blk_queue_start_drain(struct request_queue *q);
 int __bio_queue_enter(struct request_queue *q, struct bio *bio);