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block: rename and export rq_init()

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This rename rq_init() blk_rq_init() and export it. Any path that hands
the request to the block layer needs to call it to initialize the
request.

This is a preparation for large command support, which needs to
initialize the request in a proper way (that is, just doing a memset()
will not work).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2008-04-29 09:54:36 +02:00 committed by Jens Axboe
parent 992b5bceee
commit 2a4aa30c5f
4 changed files with 6 additions and 5 deletions
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4
block/blk-barrier.c
View file

@ -143,7 +143,7 @@ static void queue_flush(struct request_queue *q, unsigned which)
end_io = post_flush_end_io;
}
rq_init(q, rq);
blk_rq_init(q, rq);
rq->cmd_flags = REQ_HARDBARRIER;
rq->rq_disk = q->bar_rq.rq_disk;
rq->end_io = end_io;
@ -165,7 +165,7 @@ static inline struct request *start_ordered(struct request_queue *q,
blkdev_dequeue_request(rq);
q->orig_bar_rq = rq;
rq = &q->bar_rq;
rq_init(q, rq);
blk_rq_init(q, rq);
if (bio_data_dir(q->orig_bar_rq->bio) == WRITE)
rq->cmd_flags |= REQ_RW;
if (q->ordered & QUEUE_ORDERED_FUA)

5
block/blk-core.c
View file

@ -107,7 +107,7 @@ struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
}
EXPORT_SYMBOL(blk_get_backing_dev_info);
void rq_init(struct request_queue *q, struct request *rq)
void blk_rq_init(struct request_queue *q, struct request *rq)
{
memset(rq, 0, sizeof(*rq));
@ -120,6 +120,7 @@ void rq_init(struct request_queue *q, struct request *rq)
rq->tag = -1;
rq->ref_count = 1;
}
EXPORT_SYMBOL(blk_rq_init);
static void req_bio_endio(struct request *rq, struct bio *bio,
unsigned int nbytes, int error)
@ -598,7 +599,7 @@ blk_alloc_request(struct request_queue *q, int rw, int priv, gfp_t gfp_mask)
if (!rq)
return NULL;
rq_init(q, rq);
blk_rq_init(q, rq);
/*
* first three bits are identical in rq->cmd_flags and bio->bi_rw,

1
block/blk.h
View file

@ -10,7 +10,6 @@
extern struct kmem_cache *blk_requestq_cachep;
extern struct kobj_type blk_queue_ktype;
void rq_init(struct request_queue *q, struct request *rq);
void init_request_from_bio(struct request *req, struct bio *bio);
void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio);

1
include/linux/blkdev.h
View file

@ -607,6 +607,7 @@ extern int blk_register_queue(struct gendisk *disk);
extern void blk_unregister_queue(struct gendisk *disk);
extern void register_disk(struct gendisk *dev);
extern void generic_make_request(struct bio *bio);
extern void blk_rq_init(struct request_queue *q, struct request *rq);
extern void blk_put_request(struct request *);
extern void __blk_put_request(struct request_queue *, struct request *);
extern void blk_end_sync_rq(struct request *rq, int error);