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From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Adam Manzanares <a.manzanares@samsung.com>,
	Bart Van Assche <bvanassche@acm.org>,
	Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Hannes Reinecke <hare@suse.de>,
	Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	Himanshu Madhani <himanshu.madhani@oracle.com>,
	Ming Lei <ming.lei@redhat.com>
Subject: [PATCH v3 07/16] block/mq-deadline: Remove two local variables
Date: Thu, 17 Jun 2021 17:44:47 -0700	[thread overview]
Message-ID: <20210618004456.7280-8-bvanassche@acm.org> (raw)
In-Reply-To: <20210618004456.7280-1-bvanassche@acm.org>

Make __dd_dispatch_request() easier to read by removing two local
variables.

Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 block/mq-deadline.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 191ff5ce629c..caa438f62a4d 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -276,7 +276,6 @@ deadline_next_request(struct deadline_data *dd, int data_dir)
 static struct request *__dd_dispatch_request(struct deadline_data *dd)
 {
 	struct request *rq, *next_rq;
-	bool reads, writes;
 	int data_dir;
 
 	lockdep_assert_held(&dd->lock);
@@ -287,9 +286,6 @@ static struct request *__dd_dispatch_request(struct deadline_data *dd)
 		goto done;
 	}
 
-	reads = !list_empty(&dd->fifo_list[READ]);
-	writes = !list_empty(&dd->fifo_list[WRITE]);
-
 	/*
 	 * batches are currently reads XOR writes
 	 */
@@ -306,7 +302,7 @@ static struct request *__dd_dispatch_request(struct deadline_data *dd)
 	 * data direction (read / write)
 	 */
 
-	if (reads) {
+	if (!list_empty(&dd->fifo_list[READ])) {
 		BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[READ]));
 
 		if (deadline_fifo_request(dd, WRITE) &&
@@ -322,7 +318,7 @@ static struct request *__dd_dispatch_request(struct deadline_data *dd)
 	 * there are either no reads or writes have been starved
 	 */
 
-	if (writes) {
+	if (!list_empty(&dd->fifo_list[WRITE])) {
 dispatch_writes:
 		BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[WRITE]));
 

  parent reply	other threads:[~2021-06-18  0:45 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-18  0:44 [PATCH v3 00/16] Improve I/O priority support Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 01/16] block/Kconfig: Make the BLK_WBT and BLK_WBT_MQ entries consecutive Bart Van Assche
2021-06-18 17:09   ` Adam Manzanares
2021-06-18 19:49   ` Himanshu Madhani
2021-06-18  0:44 ` [PATCH v3 02/16] block/blk-cgroup: Swap the blk_throtl_init() and blk_iolatency_init() calls Bart Van Assche
2021-06-18 17:15   ` Adam Manzanares
2021-06-18 19:49   ` Himanshu Madhani
2021-06-21 14:24   ` Tejun Heo
2021-06-18  0:44 ` [PATCH v3 03/16] block/blk-rq-qos: Move a function from a header file into a C file Bart Van Assche
2021-06-18 17:22   ` Adam Manzanares
2021-06-18 19:49   ` Himanshu Madhani
2021-06-18  0:44 ` [PATCH v3 04/16] block: Introduce the ioprio rq-qos policy Bart Van Assche
2021-06-18 22:02   ` Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 05/16] block/mq-deadline: Add several comments Bart Van Assche
2021-06-18 22:06   ` Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 06/16] block/mq-deadline: Add two lockdep_assert_held() statements Bart Van Assche
2021-06-18 22:09   ` Adam Manzanares
2021-06-18  0:44 ` Bart Van Assche [this message]
2021-06-18 22:16   ` [PATCH v3 07/16] block/mq-deadline: Remove two local variables Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 08/16] block/mq-deadline: Rename dd_init_queue() and dd_exit_queue() Bart Van Assche
2021-06-18 22:18   ` Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 09/16] block/mq-deadline: Improve compile-time argument checking Bart Van Assche
2021-06-18 22:30   ` Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 10/16] block/mq-deadline: Improve the sysfs show and store macros Bart Van Assche
2021-06-18 23:07   ` Adam Manzanares
2021-06-18  0:44 ` [PATCH v3 11/16] block/mq-deadline: Reserve 25% of scheduler tags for synchronous requests Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 12/16] block/mq-deadline: Micro-optimize the batching algorithm Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 13/16] block/mq-deadline: Add I/O priority support Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 14/16] block/mq-deadline: Track I/O statistics Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 15/16] block/mq-deadline: Add cgroup support Bart Van Assche
2021-06-18  0:44 ` [PATCH v3 16/16] block/mq-deadline: Prioritize high-priority requests Bart Van Assche
2021-08-20  0:45   ` Niklas Cassel
2021-08-20 18:04     ` Bart Van Assche
2021-08-20 23:05       ` Niklas Cassel
2021-08-20 23:38         ` Bart Van Assche
2021-08-23  7:36           ` Niklas Cassel
2021-08-23 17:15             ` Bart Van Assche
2021-08-23 23:01               ` Damien Le Moal
2021-08-24 21:33               ` Niklas Cassel
2021-06-21 16:06 ` [PATCH v3 00/16] Improve I/O priority support Jens Axboe

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