linux-kernel - [PATCH 08/15] ps3disk: use memcpy_{from,to}

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Message-Id: <20210727055646.118787-9-hch@lst.de>
Date:   Tue, 27 Jul 2021 07:56:39 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>, Thomas Gleixner <tglx@...utronix.de>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geoff Levand <geoff@...radead.org>,
        Ilya Dryomov <idryomov@...il.com>,
        Dongsheng Yang <dongsheng.yang@...ystack.cn>,
        Mike Snitzer <snitzer@...hat.com>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Ira Weiny <ira.weiny@...el.com>, dm-devel@...hat.com,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        ceph-devel@...r.kernel.org, linux-arch@...r.kernel.org,
        "Martin K . Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 08/15] ps3disk: use memcpy_{from,to}_bvec

Use the bvec helpers instead of open coding the copy.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>
Tested-by: Geoff Levand <geoff@...radead.org>
---
 drivers/block/ps3disk.c | 18 ++----------------
 1 file changed, 2 insertions(+), 16 deletions(-)

diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index f374ea2c67ce..8d51efbe045d 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -83,26 +83,12 @@ static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
 	unsigned int offset = 0;
 	struct req_iterator iter;
 	struct bio_vec bvec;
-	unsigned int i = 0;
-	size_t size;
-	void *buf;
 
 	rq_for_each_segment(bvec, req, iter) {
-		unsigned long flags;
-		dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %llu\n",
-			__func__, __LINE__, i, bio_sectors(iter.bio),
-			iter.bio->bi_iter.bi_sector);
-
-		size = bvec.bv_len;
-		buf = bvec_kmap_irq(&bvec, &flags);
 		if (gather)
-			memcpy(dev->bounce_buf+offset, buf, size);
+			memcpy_from_bvec(dev->bounce_buf + offset, &bvec);
 		else
-			memcpy(buf, dev->bounce_buf+offset, size);
-		offset += size;
-		flush_kernel_dcache_page(bvec.bv_page);
-		bvec_kunmap_irq(buf, &flags);
-		i++;
+			memcpy_to_bvec(&bvec, dev->bounce_buf + offset);
 	}
 }
 
-- 
2.30.2