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authorChristoph Hellwig <hch@lst.de>2017-02-08 16:46:48 +0300
committerJens Axboe <axboe@fb.com>2017-02-08 23:43:06 +0300
commit34fe7c05400663e01e23cddd1fea68bb7a2b3d29 (patch)
treec03679f3bf7602925ecd9cbd6849af412b06d959 /block/deadline-iosched.c
parent6cf7677f1a94546e472658290b3b8bdbb16cc045 (diff)
downloadlinux-34fe7c05400663e01e23cddd1fea68bb7a2b3d29.tar.xz
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/deadline-iosched.c')
-rw-r--r--block/deadline-iosched.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 05fc0ea25a98..c68f6bbc0dcd 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -120,12 +120,11 @@ static void deadline_remove_request(struct request_queue *q, struct request *rq)
deadline_del_rq_rb(dd, rq);
}
-static int
+static enum elv_merge
deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
{
struct deadline_data *dd = q->elevator->elevator_data;
struct request *__rq;
- int ret;
/*
* check for front merge
@@ -138,20 +137,17 @@ deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
BUG_ON(sector != blk_rq_pos(__rq));
if (elv_bio_merge_ok(__rq, bio)) {
- ret = ELEVATOR_FRONT_MERGE;
- goto out;
+ *req = __rq;
+ return ELEVATOR_FRONT_MERGE;
}
}
}
return ELEVATOR_NO_MERGE;
-out:
- *req = __rq;
- return ret;
}
static void deadline_merged_request(struct request_queue *q,
- struct request *req, int type)
+ struct request *req, enum elv_merge type)
{
struct deadline_data *dd = q->elevator->elevator_data;