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Commit 624dbe47 authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

blk-mq: avoid code duplication 



blk_mq_exit_hw_queues() and blk_mq_free_hw_queues()
are introduced to avoid code duplication.

Signed-off-by: default avatarMing Lei <tom.leiming@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 1f9f07e9

block/blk-mq.c

+37 −24
Original line number Original line Diff line number Diff line
@@ -1523,11 +1523,43 @@ static int blk_mq_hctx_notify(void *data, unsigned long action, 
	return NOTIFY_OK;

	return NOTIFY_OK;

}

}





static void blk_mq_exit_hw_queues(struct request_queue *q,

		struct blk_mq_tag_set *set, int nr_queue)

{

	struct blk_mq_hw_ctx *hctx;

	unsigned int i;



	queue_for_each_hw_ctx(q, hctx, i) {

		if (i == nr_queue)

			break;



		if (set->ops->exit_hctx)

			set->ops->exit_hctx(hctx, i);



		blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);

		kfree(hctx->ctxs);

		blk_mq_free_bitmap(&hctx->ctx_map);

	}



}



static void blk_mq_free_hw_queues(struct request_queue *q,

		struct blk_mq_tag_set *set)

{

	struct blk_mq_hw_ctx *hctx;

	unsigned int i;



	queue_for_each_hw_ctx(q, hctx, i) {

		free_cpumask_var(hctx->cpumask);

		set->ops->free_hctx(hctx, i);

	}

}



static int blk_mq_init_hw_queues(struct request_queue *q,

static int blk_mq_init_hw_queues(struct request_queue *q,

		struct blk_mq_tag_set *set)

		struct blk_mq_tag_set *set)

{

{

	struct blk_mq_hw_ctx *hctx;

	struct blk_mq_hw_ctx *hctx;

	unsigned int i, j;

	unsigned int i;





	/*

	/*

	 * Initialize hardware queues

	 * Initialize hardware queues
@@ -1579,17 +1611,7 @@ static int blk_mq_init_hw_queues(struct request_queue *q, 
	/*

	/*

	 * Init failed

	 * Init failed

	 */

	 */

	queue_for_each_hw_ctx(q, hctx, j) {

	blk_mq_exit_hw_queues(q, set, i);

		if (i == j)

			break;



		if (set->ops->exit_hctx)

			set->ops->exit_hctx(hctx, j);



		blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);

		kfree(hctx->ctxs);

		blk_mq_free_bitmap(&hctx->ctx_map);

	}





	return 1;

	return 1;

}

}
@@ -1838,21 +1860,12 @@ EXPORT_SYMBOL(blk_mq_init_queue); 




void blk_mq_free_queue(struct request_queue *q)

void blk_mq_free_queue(struct request_queue *q)

{

{

	struct blk_mq_hw_ctx *hctx;

	struct blk_mq_tag_set	*set = q->tag_set;

	int i;





	blk_mq_del_queue_tag_set(q);

	blk_mq_del_queue_tag_set(q);





	queue_for_each_hw_ctx(q, hctx, i) {

	blk_mq_exit_hw_queues(q, set, set->nr_hw_queues);

		blk_mq_tag_idle(hctx);

	blk_mq_free_hw_queues(q, set);

		kfree(hctx->ctxs);

		blk_mq_free_bitmap(&hctx->ctx_map);

		blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);

		if (q->mq_ops->exit_hctx)

			q->mq_ops->exit_hctx(hctx, i);

		free_cpumask_var(hctx->cpumask);

		q->mq_ops->free_hctx(hctx, i);

	}





	free_percpu(q->queue_ctx);

	free_percpu(q->queue_ctx);

	kfree(q->queue_hw_ctx);

	kfree(q->queue_hw_ctx);