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Commit 1aecfe48 authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

blk-mq: move blk_mq_get_ctx/blk_mq_put_ctx to mq private header 



The blk-mq tag code need these helpers.

Signed-off-by: default avatarMing Lei <tom.leiming@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 3de0ef8d

block/blk-mq.c

+0 −22
Original line number Diff line number Diff line
@@ -33,28 +33,6 @@ static LIST_HEAD(all_q_list); 


static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx);



static struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,

					   unsigned int cpu)

{

	return per_cpu_ptr(q->queue_ctx, cpu);

}



/*

 * This assumes per-cpu software queueing queues. They could be per-node

 * as well, for instance. For now this is hardcoded as-is. Note that we don't

 * care about preemption, since we know the ctx's are persistent. This does

 * mean that we can't rely on ctx always matching the currently running CPU.

 */

static struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)

{

	return __blk_mq_get_ctx(q, get_cpu());

}



static void blk_mq_put_ctx(struct blk_mq_ctx *ctx)

{

	put_cpu();

}



/*

 * Check if any of the ctx's have pending work in this hardware queue

 */

block/blk-mq.h

+22 −0
Original line number Diff line number Diff line
@@ -69,4 +69,26 @@ struct blk_align_bitmap { 
	unsigned long depth;

} ____cacheline_aligned_in_smp;



static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,

					   unsigned int cpu)

{

	return per_cpu_ptr(q->queue_ctx, cpu);

}



/*

 * This assumes per-cpu software queueing queues. They could be per-node

 * as well, for instance. For now this is hardcoded as-is. Note that we don't

 * care about preemption, since we know the ctx's are persistent. This does

 * mean that we can't rely on ctx always matching the currently running CPU.

 */

static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)

{

	return __blk_mq_get_ctx(q, get_cpu());

}



static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx)

{

	put_cpu();

}



#endif