block: remove struct request_queue queue_head

The dispatch list is not used any more, as the legacy block IO stack
has been removed.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 4 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 167bf879f072..4798bb25f1ee 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -391,10 +391,6 @@ static inline int blkdev_reset_zones_ioctl(struct block_device *bdev,
 #endif /* CONFIG_BLK_DEV_ZONED */
 
 struct request_queue {
-        /*
-         * Together with queue_head for cacheline sharing
-         */
-        struct list_head        queue_head;
         struct request          *last_merge;
         struct elevator_queue   *elevator;