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block: Remove request_queue.nr_queues

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Commit 897bb0c7f1 ("blk-mq: Use proper cpumask iterator"; v4.6)
removed the last use of request_queue.nr_queues from outside
blk_mq_init_allocate_queue(). Remove this member variable to make
struct request_queue smaller. This patch does not change any
functionality.

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2019-09-30 16:00:42 -07:00 committed by Jens Axboe
parent 1d200e9d6f
commit 9566256518
2 changed files with 3 additions and 4 deletions
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6
block/blk-mq.c
View File

@ -2876,9 +2876,9 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
/* init q->mq_kobj and sw queues' kobjects */
blk_mq_sysfs_init(q);
q->nr_queues = nr_hw_queues(set);
q->queue_hw_ctx = kcalloc_node(q->nr_queues, sizeof(*(q->queue_hw_ctx)),
GFP_KERNEL, set->numa_node);
q->queue_hw_ctx = kcalloc_node(nr_hw_queues(set),
sizeof(*(q->queue_hw_ctx)), GFP_KERNEL,
set->numa_node);
if (!q->queue_hw_ctx)
goto err_sys_init;

1
include/linux/blkdev.h
View File

@ -411,7 +411,6 @@ struct request_queue {
/* sw queues */
struct blk_mq_ctx __percpu *queue_ctx;
unsigned int nr_queues;
unsigned int queue_depth;