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block: add a bvec_set_virt helper

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A small wrapper around bvec_set_page for callers that have a virtual
address.

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/20230203150634.3199647-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-03 16:06:14 +01:00 committed by Jens Axboe
parent 26db5ee158
commit 666e6550cb
1 changed files with 12 additions and 0 deletions
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12
include/linux/bvec.h
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@ -62,6 +62,18 @@ static inline void bvec_set_folio(struct bio_vec *bv, struct folio *folio,
bvec_set_page(bv, &folio->page, len, offset);
}
/**
* bvec_set_virt - initialize a bvec based on a virtual address
* @bv: bvec to initialize
* @vaddr: virtual address to set the bvec to
* @len: length of the bvec
*/
static inline void bvec_set_virt(struct bio_vec *bv, void *vaddr,
unsigned int len)
{
bvec_set_page(bv, virt_to_page(vaddr), len, offset_in_page(vaddr));
}
struct bvec_iter {
sector_t bi_sector; /* device address in 512 byte
sectors */