# \[PATCH 06/16\] block: use memzero\_page in zero\_fill\_bio

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-06-08 16:06:53 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2021/06/1406715
- Thread: https://ratatoskr.run/linux-mips/2021/06/1406709/t.md

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bio.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 44205dfb6b60..1d7abdb83a39 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -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);
 
-- 
2.30.2

```