linux-kernel - [PATCH 12/54] md/raid1: Use kcalloc() in setup

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Date:   Thu, 6 Oct 2016 11:07:45 +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 12/54] md/raid1: Use kcalloc() in setup_conf()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 4 Oct 2016 15:30:28 +0200

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kcalloc".

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/md/raid1.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e75ae87..5969711 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2781,9 +2781,9 @@ static struct r1conf *setup_conf(struct mddev *mddev)
 	if (!conf)
 		goto abort;
 
-	conf->mirrors = kzalloc(sizeof(struct raid1_info)
-				* mddev->raid_disks * 2,
-				 GFP_KERNEL);
+	conf->mirrors = kcalloc(mddev->raid_disks * 2,
+				sizeof(*conf->mirrors),
+				GFP_KERNEL);
 	if (!conf->mirrors)
 		goto abort;
 
-- 
2.10.1