block: drop barrier ordering by queue draining

[net-next-2.6.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 996549d7192304406aebaf15c37987f18ff5b88d..20a3710a481bb7dbec8f7bc835c6a46eee2896a4 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -360,9 +360,10 @@ struct request_queue
        unsigned int            flush_flags;
 
        unsigned int            ordered, next_ordered, ordseq;
-       int                     orderr, ordcolor;
-       struct request          pre_flush_rq, bar_rq, post_flush_rq;
+       int                     orderr;
+       struct request          bar_rq;
        struct request          *orig_bar_rq;
+       struct list_head        pending_barriers;
 
        struct mutex            sysfs_lock;
 
@@ -491,12 +492,11 @@ enum {
        /*
         * Ordered operation sequence
         */
-       QUEUE_ORDSEQ_STARTED    = 0x01, /* flushing in progress */
-       QUEUE_ORDSEQ_DRAIN      = 0x02, /* waiting for the queue to be drained */
-       QUEUE_ORDSEQ_PREFLUSH   = 0x04, /* pre-flushing in progress */
-       QUEUE_ORDSEQ_BAR        = 0x08, /* original barrier req in progress */
-       QUEUE_ORDSEQ_POSTFLUSH  = 0x10, /* post-flushing in progress */
-       QUEUE_ORDSEQ_DONE       = 0x20,
+       QUEUE_ORDSEQ_STARTED    = (1 << 0), /* flushing in progress */
+       QUEUE_ORDSEQ_PREFLUSH   = (1 << 1), /* pre-flushing in progress */
+       QUEUE_ORDSEQ_BAR        = (1 << 2), /* barrier write in progress */
+       QUEUE_ORDSEQ_POSTFLUSH  = (1 << 3), /* post-flushing in progress */
+       QUEUE_ORDSEQ_DONE       = (1 << 4),
 };
 
 #define blk_queue_plugged(q)   test_bit(QUEUE_FLAG_PLUGGED, &(q)->queue_flags)
@@ -869,9 +869,6 @@ extern void blk_queue_rq_timed_out(struct request_queue *, rq_timed_out_fn *);
 extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
 extern void blk_queue_flush(struct request_queue *q, unsigned int flush);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
-extern unsigned blk_ordered_cur_seq(struct request_queue *);
-extern unsigned blk_ordered_req_seq(struct request *);
-extern bool blk_ordered_complete_seq(struct request_queue *, unsigned, int);
 
 extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
 extern void blk_dump_rq_flags(struct request *, char *);