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 <axboe@fb.com>
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 @@
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 @@
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;