[2/5] blk-mq: add non_owner variant of blk_mq_freeze_queue API

Commit Message

Ming Lei Oct. 30, 2024, 12:42 p.m. UTC

Add non_owner variant of blk_mq_freeze_queue API for rbd.

Signed-off-by: Ming Lei <[e-mail]>
---
 block/blk-mq.c         | 14 +++++++++++---
 include/linux/blk-mq.h |  1 +
 2 files changed, 12 insertions(+), 3 deletions(-)

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5f4496220432..8e18284ede8f 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -195,12 +195,20 @@  void blk_mq_unfreeze_queue(struct request_queue *q)
 EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue);
 
 /*
- * non_owner variant of blk_freeze_queue_start
+ * non_owner variant of blk_mq_freeze_queue
  *
- * Unlike blk_freeze_queue_start, the queue doesn't need to be unfrozen
- * by the same task.  This is fragile and should not be used if at all
+ * Unlike blk_mq_freeze_queue, the queue doesn't need to be unfrozen by
+ * the same task. This is fragile and should not be used if at all
  * possible.
  */
+void blk_mq_freeze_queue_non_owner(struct request_queue *q)
+{
+	__blk_freeze_queue_start(q);
+	blk_mq_freeze_queue_wait(q);
+}
+EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_non_owner);
+
+/* non_owner variant of blk_freeze_queue_start */
 void blk_freeze_queue_start_non_owner(struct request_queue *q)
 {
 	__blk_freeze_queue_start(q);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 2035fad3131f..ed15dc2e7bd6 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -919,6 +919,7 @@  void blk_freeze_queue_start(struct request_queue *q);
 void blk_mq_freeze_queue_wait(struct request_queue *q);
 int blk_mq_freeze_queue_wait_timeout(struct request_queue *q,
 				     unsigned long timeout);
+void blk_mq_freeze_queue_non_owner(struct request_queue *q);
 void blk_mq_unfreeze_queue_non_owner(struct request_queue *q);
 void blk_freeze_queue_start_non_owner(struct request_queue *q);