diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 8678c4322b4..0d84981ee03 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -98,7 +98,8 @@ struct request { struct list_head queuelist; union { struct call_single_data csd; - struct work_struct mq_flush_data; + struct work_struct mq_flush_work; + unsigned long fifo_time; }; struct request_queue *q; @@ -117,7 +118,18 @@ struct request { struct bio *bio; struct bio *biotail; - struct hlist_node hash; /* merge hash */ + /* + * The hash is used inside the scheduler, and killed once the + * request reaches the dispatch list. The ipi_list is only used + * to queue the request for softirq completion, which is long + * after the request has been unhashed (and even removed from + * the dispatch list). + */ + union { + struct hlist_node hash; /* merge hash */ + struct list_head ipi_list; + }; + /* * The rb_node is only used inside the io scheduler, requests * are pruned when moved to the dispatch queue. So let the @@ -448,13 +460,8 @@ struct request_queue { unsigned long flush_pending_since; struct list_head flush_queue[2]; struct list_head flush_data_in_flight; - union { - struct request flush_rq; - struct { - spinlock_t mq_flush_lock; - struct work_struct mq_flush_work; - }; - }; + struct request *flush_rq; + spinlock_t mq_flush_lock; struct mutex sysfs_lock; @@ -828,8 +835,8 @@ extern int blk_rq_map_user(struct request_queue *, struct request *, extern int blk_rq_unmap_user(struct bio *); extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t); extern int blk_rq_map_user_iov(struct request_queue *, struct request *, - struct rq_map_data *, struct sg_iovec *, int, - unsigned int, gfp_t); + struct rq_map_data *, const struct sg_iovec *, + int, unsigned int, gfp_t); extern int blk_execute_rq(struct request_queue *, struct gendisk *, struct request *, int); extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, |