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authorJens Axboe <axboe@kernel.dk>2018-10-29 10:23:51 -0600
committerJens Axboe <axboe@kernel.dk>2018-11-07 13:42:32 -0700
commita1ce35fa49852db60fc6e268038530be533c5b15 (patch)
tree7a0bb9576a3f0e31e22f849463eee6cdda26bad5 /block/blk-merge.c
parentf382fb0bcef4c37dc049e9f6963e3baf204d815c (diff)
downloadlinux-a1ce35fa49852db60fc6e268038530be533c5b15.tar.bz2
block: remove dead elevator code
This removes a bunch of core and elevator related code. On the core front, we remove anything related to queue running, draining, initialization, plugging, and congestions. We also kill anything related to request allocation, merging, retrieval, and completion. Remove any checking for single queue IO schedulers, as they no longer exist. This means we can also delete a bunch of code related to request issue, adding, completion, etc - and all the SQ related ops and helpers. Also kill the load_default_modules(), as all that did was provide for a way to load the default single queue elevator. Tested-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-merge.c')
-rw-r--r--block/blk-merge.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 6b5ad275ed56..c068c30b0c35 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -862,13 +862,8 @@ struct request *attempt_front_merge(struct request_queue *q, struct request *rq)
int blk_attempt_req_merge(struct request_queue *q, struct request *rq,
struct request *next)
{
- struct elevator_queue *e = q->elevator;
struct request *free;
- if (!e->uses_mq && e->type->ops.sq.elevator_allow_rq_merge_fn)
- if (!e->type->ops.sq.elevator_allow_rq_merge_fn(q, rq, next))
- return 0;
-
free = attempt_merge(q, rq, next);
if (free) {
__blk_put_request(q, free);