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block: add a bvec_set_folio helper 

A smaller wrapper around bvec_set_page that takes a folio instead.
There are only two potential users for this in the tree, but the number
will grow in the future.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20230203150634.3199647-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-03 16:06:13 +01:00 committed by Jens Axboe
parent d58cdfae6a
commit 26db5ee158
1 changed files with 13 additions and 0 deletions
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13
include/linux/bvec.h
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@ -49,6 +49,19 @@ static inline void bvec_set_page(struct bio_vec *bv, struct page *page,
bv->bv_offset = offset;
}
/**
* bvec_set_folio - initialize a bvec based off a struct folio
* @bv: bvec to initialize
* @folio: folio the bvec should point to
* @len: length of the bvec
* @offset: offset into the folio
*/
static inline void bvec_set_folio(struct bio_vec *bv, struct folio *folio,
unsigned int len, unsigned int offset)
{
bvec_set_page(bv, &folio->page, len, offset);
}
struct bvec_iter {
sector_t bi_sector; /* device address in 512 byte
sectors */