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[PATCH] Add scatter-gather support for the block layer SG_IO

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Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
James Bottomley
2005-06-20 14:06:52 +02:00
committed by Jens Axboe
parent dd1cab95f3
commit f1970baf6d
5 changed files with 187 additions and 58 deletions
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4
include/linux/bio.h
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@@ -281,6 +281,10 @@ extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int);
extern int bio_get_nr_vecs(struct block_device *);
extern struct bio *bio_map_user(struct request_queue *, struct block_device *,
unsigned long, unsigned int, int);
struct sg_iovec;
extern struct bio *bio_map_user_iov(struct request_queue *,
struct block_device *,
struct sg_iovec *, int, int);
extern void bio_unmap_user(struct bio *);
extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
unsigned int);