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block: Add bio_alloc_pages()

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More utility code to replace stuff that's getting open coded.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: NeilBrown <neilb@suse.de>
This commit is contained in:
Kent Overstreet 2012-09-10 14:03:28 -07:00
parent cb34e057ad
commit a07876064a
3 changed files with 32 additions and 13 deletions
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include/linux/bio.h
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@ -298,6 +298,7 @@ static inline void bio_flush_dcache_pages(struct bio *bi)
#endif
extern void bio_copy_data(struct bio *dst, struct bio *src);
extern int bio_alloc_pages(struct bio *bio, gfp_t gfp);
extern struct bio *bio_copy_user(struct request_queue *, struct rq_map_data *,
unsigned long, unsigned int, int, gfp_t);