Re: [PATCH v6 1/5] blk-mq: Move the elevator_exit() definition

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On 06/04/2021 22:49, Bart Van Assche wrote:
Since elevator_exit() has only one caller, move its definition from
block/blk.h into block/elevator.c. Remove the inline keyword since modern
compilers are smart enough to decide when to inline functions that occur
in the same compilation unit.

Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Cc: John Garry <john.garry@xxxxxxxxxx>
Cc: Khazhy Kumykov <khazhy@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
  block/blk.h      | 9 ---------
  block/elevator.c | 8 ++++++++
  2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/block/blk.h b/block/blk.h
index 8f4337c5a9e6..2ed6c684d63a 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -199,15 +199,6 @@ void __elevator_exit(struct request_queue *, struct elevator_queue *);
  int elv_register_queue(struct request_queue *q, bool uevent);
  void elv_unregister_queue(struct request_queue *q);
-static inline void elevator_exit(struct request_queue *q,
-		struct elevator_queue *e)
-{
-	lockdep_assert_held(&q->sysfs_lock);
-
-	blk_mq_sched_free_requests(q);
-	__elevator_exit(q, e);
-}
-
  ssize_t part_size_show(struct device *dev, struct device_attribute *attr,
  		char *buf);
  ssize_t part_stat_show(struct device *dev, struct device_attribute *attr,
diff --git a/block/elevator.c b/block/elevator.c
index 293c5c81397a..4b20d1ab29cc 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -197,6 +197,14 @@ void __elevator_exit(struct request_queue *q, struct elevator_queue *e)
  	kobject_put(&e->kobj);
  }
+static void elevator_exit(struct request_queue *q, struct elevator_queue *e)
+{
+	lockdep_assert_held(&q->sysfs_lock);
+
+	blk_mq_sched_free_requests(q);
+	__elevator_exit(q, e);

To me, it seems odd that the double-underscore prefix symbol is public (__elevator_exit), while the companion symbol (elevator_exit) is private.

But it looks a sensible change to bring into the c file anyway.

Thanks,
John

+}
+
  static inline void __elv_rqhash_del(struct request *rq)
  {
  	hash_del(&rq->hash);
.





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