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From:   Christoph Hellwig <hch@lst.de>
To:     Jens Axboe <axboe@kernel.dk>, Thomas Gleixner <tglx@linutronix.de>
Cc:     Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Geoff Levand <geoff@infradead.org>,
        Ilya Dryomov <idryomov@gmail.com>,
        Dongsheng Yang <dongsheng.yang@easystack.cn>,
        Mike Snitzer <snitzer@redhat.com>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Ira Weiny <ira.weiny@intel.com>, dm-devel@redhat.com,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        ceph-devel@vger.kernel.org, linux-arch@vger.kernel.org,
        Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>
Subject: [PATCH 05/15] block: use memzero_page in zero_fill_bio
Date:   Tue, 27 Jul 2021 07:56:36 +0200
Message-Id: <20210727055646.118787-6-hch@lst.de>
In-Reply-To: <20210727055646.118787-1-hch@lst.de>
References: <20210727055646.118787-1-hch@lst.de>
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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>
---
 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);
 
-- 
2.30.2