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| author | Christoph Hellwig <hch@lst.de> | 2017-02-08 14:46:48 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-02-08 13:43:06 -0700 |
| commit | 34fe7c05400663e01e23cddd1fea68bb7a2b3d29 (patch) | |
| tree | c03679f3bf7602925ecd9cbd6849af412b06d959 /block/elevator.c | |
| parent | 6cf7677f1a94546e472658290b3b8bdbb16cc045 (diff) | |
| download | linux-stable-34fe7c05400663e01e23cddd1fea68bb7a2b3d29.tar.gz linux-stable-34fe7c05400663e01e23cddd1fea68bb7a2b3d29.tar.bz2 linux-stable-34fe7c05400663e01e23cddd1fea68bb7a2b3d29.zip | |
block: enumify ELEVATOR_*_MERGE
Switch these constants to an enum, and make let the compiler ensure that
all callers of blk_try_merge and elv_merge handle all potential values.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/block/elevator.c b/block/elevator.c index 7e4f5880dd64..27ff1ed5a6fa 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -427,11 +427,11 @@ void elv_dispatch_add_tail(struct request_queue *q, struct request *rq) } EXPORT_SYMBOL(elv_dispatch_add_tail); -int elv_merge(struct request_queue *q, struct request **req, struct bio *bio) +enum elv_merge elv_merge(struct request_queue *q, struct request **req, + struct bio *bio) { struct elevator_queue *e = q->elevator; struct request *__rq; - int ret; /* * Levels of merges: @@ -446,7 +446,8 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio) * First try one-hit cache. */ if (q->last_merge && elv_bio_merge_ok(q->last_merge, bio)) { - ret = blk_try_merge(q->last_merge, bio); + enum elv_merge ret = blk_try_merge(q->last_merge, bio); + if (ret != ELEVATOR_NO_MERGE) { *req = q->last_merge; return ret; @@ -514,7 +515,8 @@ bool elv_attempt_insert_merge(struct request_queue *q, struct request *rq) return ret; } -void elv_merged_request(struct request_queue *q, struct request *rq, int type) +void elv_merged_request(struct request_queue *q, struct request *rq, + enum elv_merge type) { struct elevator_queue *e = q->elevator; |