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authorMartin K. Petersen <martin.petersen@oracle.com>2012-09-18 12:19:25 -0400
committerJens Axboe <axboe@kernel.dk>2012-09-20 14:31:38 +0200
commite2a60da74fc8215c68509a89e9a69c66363153db (patch)
treec23dd6540dc211e2b2583c3e950a7f6977e3f1df /block/elevator.c
parentd41570b7469724005eb78448a69289900f911963 (diff)
downloadop-kernel-dev-e2a60da74fc8215c68509a89e9a69c66363153db.zip
op-kernel-dev-e2a60da74fc8215c68509a89e9a69c66363153db.tar.gz
block: Clean up special command handling logic
Remove special-casing of non-rw fs style requests (discard). The nomerge flags are consolidated in blk_types.h, and rq_mergeable() and bio_mergeable() have been modified to use them. bio_is_rw() is used in place of bio_has_data() a few places. This is done to to distinguish true reads and writes from other fs type requests that carry a payload (e.g. write same). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.c')
-rw-r--r--block/elevator.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 6a55d41..9b1d42b 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -562,8 +562,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
if (rq->cmd_flags & REQ_SOFTBARRIER) {
/* barriers are scheduling boundary, update end_sector */
- if (rq->cmd_type == REQ_TYPE_FS ||
- (rq->cmd_flags & REQ_DISCARD)) {
+ if (rq->cmd_type == REQ_TYPE_FS) {
q->end_sector = rq_end_sector(rq);
q->boundary_rq = rq;
}
@@ -605,8 +604,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
if (elv_attempt_insert_merge(q, rq))
break;
case ELEVATOR_INSERT_SORT:
- BUG_ON(rq->cmd_type != REQ_TYPE_FS &&
- !(rq->cmd_flags & REQ_DISCARD));
+ BUG_ON(rq->cmd_type != REQ_TYPE_FS);
rq->cmd_flags |= REQ_SORTED;
q->nr_sorted++;
if (rq_mergeable(rq)) {
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