linux-kernel - [PATCH 47/54] md/raid10: Improve another size determination in raid10_start

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Date:   Thu, 6 Oct 2016 11:47:01 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-raid@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Guoqing Jiang <gqjiang@...e.com>, Jens Axboe <axboe@...com>,
        Mike Christie <mchristi@...hat.com>,
        Neil Brown <neilb@...e.com>, Shaohua Li <shli@...nel.org>,
        Tomasz Majchrzak <tomasz.majchrzak@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 47/54] md/raid10: Improve another size determination in
 raid10_start_reshape()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 5 Oct 2016 18:48:17 +0200

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/md/raid10.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 9b8d11f..62cd159 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4065,7 +4065,7 @@ static int raid10_start_reshape(struct mddev *mddev)
 	spin_lock_irq(&conf->device_lock);
 	if (conf->mirrors_new) {
 		memcpy(conf->mirrors_new, conf->mirrors,
-		       sizeof(struct raid10_info)*conf->prev.raid_disks);
+		       sizeof(*conf->mirrors_new) * conf->prev.raid_disks);
 		smp_mb();
 		kfree(conf->mirrors_old);
 		conf->mirrors_old = conf->mirrors;
-- 
2.10.1