Commit ab6c340e authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: use memzero_page in zero_fill_bio 



Use memzero_bvec to zero each segment in the bio instead of manually
mapping and zeroing the data.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20210727055646.118787-6-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent f93a181a

block/bio.c

+2 −7
Original line number Diff line number Diff line
@@ -495,16 +495,11 @@ EXPORT_SYMBOL(bio_kmalloc); 


void zero_fill_bio(struct bio *bio)

{

	unsigned long flags;

	struct bio_vec bv;

	struct bvec_iter iter;



	bio_for_each_segment(bv, bio, iter) {

		char *data = bvec_kmap_irq(&bv, &flags);

		memset(data, 0, bv.bv_len);

		flush_dcache_page(bv.bv_page);

		bvec_kunmap_irq(data, &flags);

	}

	bio_for_each_segment(bv, bio, iter)

		memzero_bvec(&bv);

}

EXPORT_SYMBOL(zero_fill_bio);