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authorChristoph Hellwig <hch@lst.de>2014-04-15 14:14:00 -0600
committerJens Axboe <axboe@fb.com>2014-04-15 14:18:02 -0600
commit24d2f90309b23f2cfe016b2aebc5f0d6e01c57fd (patch)
tree10307829129eb8f96facbb89fefbba3c0032fb46 /block/blk-mq.h
parented44832dea8a74f909e0187f350201402927f5e5 (diff)
downloadlinux-24d2f90309b23f2cfe016b2aebc5f0d6e01c57fd.tar.bz2
blk-mq: split out tag initialization, support shared tags
Add a new blk_mq_tag_set structure that gets set up before we initialize the queue. A single blk_mq_tag_set structure can be shared by multiple queues. Signed-off-by: Christoph Hellwig <hch@lst.de> Modular export of blk_mq_{alloc,free}_tagset added by me. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
-rw-r--r--block/blk-mq.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 7964dadb7d64..5fa14f19f752 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -1,6 +1,8 @@
#ifndef INT_BLK_MQ_H
#define INT_BLK_MQ_H
+struct blk_mq_tag_set;
+
struct blk_mq_ctx {
struct {
spinlock_t lock;
@@ -46,8 +48,7 @@ void blk_mq_disable_hotplug(void);
/*
* CPU -> queue mappings
*/
-struct blk_mq_reg;
-extern unsigned int *blk_mq_make_queue_map(struct blk_mq_reg *reg);
+extern unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set);
extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);
void blk_mq_add_timer(struct request *rq);