From: Christoph Hellwig <hch@lst.de>
Date: Tue, 27 Jul 2021 07:56:36 +0200
Subject: [PATCH] block: use memzero_page in zero_fill_bio
Git-commit: ab6c340eeac426fb649ddb4f23b7c752f0092204
Patch-mainline: v5.15-rc1
References: jsc#PED1183

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>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20210727055646.118787-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 block/bio.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 1fab762e079b..2e436bccb1e2 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);
 
-- 
2.35.3