block: get rid of on-stack plugging debug checks

We don't need them anymore, so kill:

- REQ_ON_PLUG checks in various places
- !rq_mergeable() check in plug merging

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/block/elevator.c b/block/elevator.c
index 2a0b653c90fd..b0b38ce0dcb6 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -416,8 +416,6 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
         struct list_head *entry;
         int stop_flags;
 
-        BUG_ON(rq->cmd_flags & REQ_ON_PLUG);
-
         if (q->last_merge == rq)
                 q->last_merge = NULL;
 
@@ -656,8 +654,6 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
 
         rq->q = q;
 
-        BUG_ON(rq->cmd_flags & REQ_ON_PLUG);
-
         if (rq->cmd_flags & REQ_SOFTBARRIER) {
                 /* barriers are scheduling boundary, update end_sector */
                 if (rq->cmd_type == REQ_TYPE_FS ||