diff options
| author |   FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-04-25 12:47:50 +0200 |
|---|---|---|
| committer |   Jens Axboe <jens.axboe@oracle.com> | 2008-04-29 09:50:34 +0200 |
| commit | 68154e90c9d1492d570671ae181d9a8f8530da55 (patch) | |
| tree | 4b4e9cfbaa587a576e7e52284c53ef99cf69ac4d /include/linux/bio.h | |
| parent | unexport blk_max_pfn (diff) | |
| download | linux-dev-68154e90c9d1492d570671ae181d9a8f8530da55.tar.xz linux-dev-68154e90c9d1492d570671ae181d9a8f8530da55.zip | |
block: add dma alignment and padding support to blk_rq_map_kern
This patch adds bio_copy_kern similar to
bio_copy_user. blk_rq_map_kern uses bio_copy_kern instead of
bio_map_kern if necessary.
bio_copy_kern uses temporary pages and the bi_end_io callback frees
these pages. bio_copy_kern saves the original kernel buffer at
bio->bi_private it doesn't use something like struct bio_map_data to
store the information about the caller.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/bio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index d259690863fb..61c15eaf3fb3 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -324,6 +324,8 @@ extern struct bio *bio_map_user_iov(struct request_queue *, extern void bio_unmap_user(struct bio *); extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int, gfp_t); +extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, + gfp_t, int); extern void bio_set_pages_dirty(struct bio *bio); extern void bio_check_pages_dirty(struct bio *bio); extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int); |