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>
This commit is contained in:
Christoph Hellwig 2017-02-08 14:46:48 +01:00 • committed by Jens Axboe
commit 34fe7c0540
10 changed files with 102 additions and 101 deletions

View file

@ -121,7 +121,7 @@ static void deadline_remove_request(struct request_queue *q, struct request *rq)
}
static void dd_request_merged(struct request_queue *q, struct request *req,
int type)
enum elv_merge type)
{
struct deadline_data *dd = q->elevator->elevator_data;