linux-kernel - [PATCH 1/13] md/multipath: Use kcalloc() in multipath

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Date:   Sun, 2 Oct 2016 13:56:33 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-raid@...r.kernel.org, Jens Axboe <axboe@...com>,
        NeilBrown <neilb@...e.com>, Shaohua Li <shli@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 1/13] md/multipath: Use kcalloc() in multipath_run()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 1 Oct 2016 20:40:42 +0200

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

  This issue was detected by using the Coccinelle software.

* 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/multipath.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 673efbd..bd53451 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -408,7 +408,8 @@ static int multipath_run (struct mddev *mddev)
 		goto out;
 	}
 
-	conf->multipaths = kzalloc(sizeof(struct multipath_info)*mddev->raid_disks,
+	conf->multipaths = kcalloc(mddev->raid_disks,
+				   sizeof(*conf->multipaths),
 				   GFP_KERNEL);
 	if (!conf->multipaths) {
 		printk(KERN_ERR
-- 
2.10.0