linux-kernel - [PATCH] block/mq-deadline: Fix unused-function compilation warning

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Message-Id: <20210901064705.55071-1-tianjia.zhang@linux.alibaba.com>
Date:   Wed,  1 Sep 2021 14:47:05 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH] block/mq-deadline: Fix unused-function compilation warning

If CONFIG_BLK_DEBUG_FS is not defined, the following compilation warning
will be reported:

  block/mq-deadline.c:274:12: warning: ‘dd_queued’ defined but not used [-Wunused-function]
   static u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)

Move the function dd_queued() to the scope of this config and mark it
inline.

Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
---
 block/mq-deadline.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 3c3693c34f06..084314ee878d 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -270,12 +270,6 @@ deadline_move_request(struct deadline_data *dd, struct dd_per_prio *per_prio,
 	deadline_remove_request(rq->q, per_prio, rq);
 }
 
-/* Number of requests queued for a given priority level. */
-static u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)
-{
-	return dd_sum(dd, inserted, prio) - dd_sum(dd, completed, prio);
-}
-
 /*
  * deadline_check_fifo returns 0 if there are no expired requests on the fifo,
  * 1 otherwise. Requires !list_empty(&dd->fifo_list[data_dir])
@@ -953,6 +947,12 @@ static int dd_async_depth_show(void *data, struct seq_file *m)
 	return 0;
 }
 
+/* Number of requests queued for a given priority level. */
+static inline u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)
+{
+	return dd_sum(dd, inserted, prio) - dd_sum(dd, completed, prio);
+}
+
 static int dd_queued_show(void *data, struct seq_file *m)
 {
 	struct request_queue *q = data;
-- 
2.19.1.3.ge56e4f7