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blk-mq: get rid of ->cmd_size in the hardware queue

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We store it in the tag set, we don't need it in the hardware queue.
While removing cmd_size, place ->queue_num further down to avoid
a hole on 64-bit archs. It's not used in any fast paths, so we
can safely move it.

Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe
2015-01-07 10:44:04 -07:00
parent 35b489d32f
commit 17ded32070
2 changed files with 1 additions and 3 deletions
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3
include/linux/blk-mq.h
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@@ -34,7 +34,6 @@ struct blk_mq_hw_ctx {
unsigned long flags; /* BLK_MQ_F_* flags */
struct request_queue *queue;
unsigned int queue_num;
struct blk_flush_queue *fq;
void *driver_data;
@@ -54,7 +53,7 @@ struct blk_mq_hw_ctx {
unsigned long dispatched[BLK_MQ_MAX_DISPATCH_ORDER];
unsigned int numa_node;
unsigned int cmd_size; /* per-request extra data */
unsigned int queue_num;
atomic_t nr_active;