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block: use memcpy_to_bvec in copy_to_high_bio_irq 

Use memcpy_to_bvec instead of opencoding the logic.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210727055646.118787-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-07-27 07:56:42 +02:00 committed by Jens Axboe
parent f8b679a070
commit f434cdc78e
1 changed files with 2 additions and 18 deletions
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20
block/bounce.c
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@ -67,18 +67,6 @@ static __init int init_emergency_pool(void)
__initcall(init_emergency_pool);
/*
* highmem version, map in to vec
*/
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
{
unsigned char *vto;
vto = kmap_atomic(to->bv_page);
memcpy(vto + to->bv_offset, vfrom, to->bv_len);
kunmap_atomic(vto);
}
/*
* Simple bounce buffer support for highmem pages. Depending on the
* queue gfp mask set, *to may or may not be a highmem page. kmap it
@ -86,7 +74,6 @@ static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
*/
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
{
unsigned char *vfrom;
struct bio_vec tovec, fromvec;
struct bvec_iter iter;
/*
@ -104,11 +91,8 @@ static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
* been modified by the block layer, so use the original
* copy, bounce_copy_vec already uses tovec->bv_len
*/
vfrom = page_address(fromvec.bv_page) +
tovec.bv_offset;
bounce_copy_vec(&tovec, vfrom);
flush_dcache_page(tovec.bv_page);
memcpy_to_bvec(&tovec, page_address(fromvec.bv_page) +
tovec.bv_offset);
}
bio_advance_iter(from, &from_iter, tovec.bv_len);
}