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block: Bring back zero_fill_bio_iter 

This reverts 6f822e1b5d - this helper is
used by bcachefs.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Link: https://lore.kernel.org/r/20230813182636.2966159-4-kent.overstreet@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kent Overstreet 2023-08-13 14:26:36 -04:00 committed by Jens Axboe
parent 168145f617
commit 649f070e69
2 changed files with 9 additions and 4 deletions
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6
block/bio.c
View File

@ -606,15 +606,15 @@ struct bio *bio_kmalloc(unsigned short nr_vecs, gfp_t gfp_mask)
}
EXPORT_SYMBOL(bio_kmalloc);
void zero_fill_bio(struct bio *bio)
void zero_fill_bio_iter(struct bio *bio, struct bvec_iter start)
{
struct bio_vec bv;
struct bvec_iter iter;
bio_for_each_segment(bv, bio, iter)
__bio_for_each_segment(bv, bio, iter, start)
memzero_bvec(&bv);
}
EXPORT_SYMBOL(zero_fill_bio);
EXPORT_SYMBOL(zero_fill_bio_iter);
/**
* bio_truncate - truncate the bio to small size of @new_size

7
include/linux/bio.h
View File

@ -488,7 +488,12 @@ extern void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter,
extern void bio_copy_data(struct bio *dst, struct bio *src);
extern void bio_free_pages(struct bio *bio);
void guard_bio_eod(struct bio *bio);
void zero_fill_bio(struct bio *bio);
void zero_fill_bio_iter(struct bio *bio, struct bvec_iter iter);
static inline void zero_fill_bio(struct bio *bio)
{
zero_fill_bio_iter(bio, bio->bi_iter);
}
static inline void bio_release_pages(struct bio *bio, bool mark_dirty)
{