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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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include/linux/blkdev.h
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@@ -561,6 +561,7 @@ extern void blk_queue_activity_fn(request_queue_t *, activity_fn *, void *);
extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned int);
extern int blk_rq_unmap_user(struct bio *, unsigned int);
extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, unsigned int);
extern int blk_rq_map_user_iov(request_queue_t *, struct request *, struct sg_iovec *, int);
extern int blk_execute_rq(request_queue_t *, struct gendisk *, struct request *);
static inline request_queue_t *bdev_get_queue(struct block_device *bdev)