From 17ded320706c6316376059cfbe9dccab32c62b42 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 7 Jan 2015 10:44:04 -0700 Subject: [PATCH] blk-mq: get rid of ->cmd_size in the hardware queue 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 --- block/blk-mq.c | 1 - include/linux/blk-mq.h | 3 +-- 2 files changed, 1 insertion(+), 3 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 1a41d7a..cbd2a55 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1615,7 +1615,6 @@ static int blk_mq_init_hctx(struct request_queue *q, hctx->queue = q; hctx->queue_num = hctx_idx; hctx->flags = set->flags; - hctx->cmd_size = set->cmd_size; blk_mq_init_cpu_notifier(&hctx->cpu_notifier, blk_mq_hctx_notify, hctx); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 3b43f50..d0de259 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -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; -- 2.7.4