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block: move ->make_request_fn to struct block_device_operations

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The make_request_fn is a little weird in that it sits directly in
struct request_queue instead of an operation vector.  Replace it with
a block_device_operations method called submit_bio (which describes much
better what it does).  Also remove the request_queue argument to it, as
the queue can be derived pretty trivially from the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-07-01 10:59:43 +02:00 • committed by Jens Axboe
parent e439ab710f
commit c62b37d96b
36 changed files with 153 additions and 140 deletions
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7
include/linux/blkdev.h
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@ -286,8 +286,6 @@ static inline unsigned short req_get_ioprio(struct request *req)
struct blk_queue_ctx;
typedef blk_qc_t (make_request_fn) (struct request_queue *q, struct bio *bio);
struct bio_vec;
enum blk_eh_timer_return {
@ -398,8 +396,6 @@ struct request_queue {
struct blk_queue_stats *stats;
struct rq_qos *rq_qos;
make_request_fn *make_request_fn;
const struct blk_mq_ops *mq_ops;
/* sw queues */
@ -1162,7 +1158,7 @@ static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq,
extern void blk_dump_rq_flags(struct request *, char *);
bool __must_check blk_get_queue(struct request_queue *);
struct request_queue *blk_alloc_queue(make_request_fn make_request, int node_id);
struct request_queue *blk_alloc_queue(int node_id);
extern void blk_put_queue(struct request_queue *);
extern void blk_set_queue_dying(struct request_queue *);
@ -1778,6 +1774,7 @@ static inline void blk_ksm_unregister(struct request_queue *q) { }
struct block_device_operations {
blk_qc_t (*submit_bio) (struct bio *bio);
int (*open) (struct block_device *, fmode_t);
void (*release) (struct gendisk *, fmode_t);
int (*rw_page)(struct block_device *, sector_t, struct page *, unsigned int);