linux-kernel - RE: [PATCH] [v3] blk-mq-tag: make blk_mq_tag

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Date:   Tue, 15 Dec 2020 14:43:18 +0000
From:   Tianxianting <tian.xianting@....com>
To:     "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] [v3] blk-mq-tag: make blk_mq_tag_busy() return void

Hi jens
Could I get your commits?  thanks

-----Original Message-----
From: tianxianting (RD) 
Sent: Thursday, December 10, 2020 2:05 PM
To: axboe@...nel.dk
Cc: ming.lei@...hat.com; linux-block@...r.kernel.org; linux-kernel@...r.kernel.org; tianxianting (RD) <tian.xianting@....com>
Subject: [PATCH] [v3] blk-mq-tag: make blk_mq_tag_busy() return void

As no one cares about the return value of blk_mq_tag_busy() and __blk_mq_tag_busy(), so make them return void.

Other change is to simplify blk_mq_tag_idle().

Signed-off-by: Xianting Tian <tian.xianting@....com>
Reviewed-by: Ming Lei <ming.lei@...hat.com>
---
 block/blk-mq-tag.c |  4 +---
 block/blk-mq-tag.h | 16 ++++++----------
 2 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 9c92053e7..01c0bb1fb 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -21,7 +21,7 @@
  * to get tag when first time, the other shared-tag users could reserve
  * budget for it.
  */
-bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
+void __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
 {
 	if (blk_mq_is_sbitmap_shared(hctx->flags)) {
 		struct request_queue *q = hctx->queue; @@ -35,8 +35,6 @@ bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
 		    !test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
 			atomic_inc(&hctx->tags->active_queues);
 	}
-
-	return true;
 }
 
 /*
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 7d3e6b333..4b4ccd794 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -60,23 +60,19 @@ enum {
 	BLK_MQ_TAG_MAX		= BLK_MQ_NO_TAG - 1,
 };
 
-extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
+extern void __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
 extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
 
-static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
+static inline void blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
 {
-	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
-		return false;
-
-	return __blk_mq_tag_busy(hctx);
+	if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
+		__blk_mq_tag_busy(hctx);
 }
 
 static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)  {
-	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
-		return;
-
-	__blk_mq_tag_idle(hctx);
+	if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
+		__blk_mq_tag_idle(hctx);
 }
 
 static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
--
2.17.1