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block: get rid of unused plug->nowait flag 

This was introduced to add a plug based way of signaling nowait issues,
but we have since moved on from that. Kill the old dead code, nobody is
setting it anymore.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-08-08 11:03:28 -06:00
parent 95848dcb9d
commit d74f714896
2 changed files with 0 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block/blk-core.c
View File

@ -722,14 +722,9 @@ void submit_bio_noacct(struct bio *bio)
struct block_device *bdev = bio->bi_bdev;
struct request_queue *q = bdev_get_queue(bdev);
blk_status_t status = BLK_STS_IOERR;
struct blk_plug *plug;
might_sleep();
plug = blk_mq_plug(bio);
if (plug && plug->nowait)
bio->bi_opf |= REQ_NOWAIT;
/*
* For a REQ_NOWAIT based request, return -EOPNOTSUPP
* if queue does not support NOWAIT.
@ -1059,7 +1054,6 @@ void blk_start_plug_nr_ios(struct blk_plug *plug, unsigned short nr_ios)
plug->rq_count = 0;
plug->multiple_queues = false;
plug->has_elevator = false;
plug->nowait = false;
INIT_LIST_HEAD(&plug->cb_list);
/*

1
include/linux/blkdev.h
View File

@ -969,7 +969,6 @@ struct blk_plug {
bool multiple_queues;
bool has_elevator;
bool nowait;
struct list_head cb_list; /* md requires an unplug callback */
};