linux-kernel - [PATCH 2/3] net: sched: cls_fw: Improve two size determinations in fw

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Message-ID: <fd17f239-4d25-fdd5-bef6-6c50462fd22b@users.sourceforge.net>
Date:   Wed, 8 Nov 2017 19:42:30 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     netdev@...r.kernel.org, Cong Wang <xiyou.wangcong@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 2/3] net: sched: cls_fw: Improve two size determinations in
 fw_change()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 8 Nov 2017 19:19:10 +0100

Replace the specification of data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 net/sched/cls_fw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index 567db4d2349f..53c1c8ae3e00 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -269,7 +269,7 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
 		if (f->id != handle && handle)
 			return -EINVAL;
 
-		fnew = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
+		fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 		if (!fnew)
 			return -ENOBUFS;
 
@@ -323,7 +323,7 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
 		rcu_assign_pointer(tp->root, head);
 	}
 
-	f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
+	f = kzalloc(sizeof(*f), GFP_KERNEL);
 	if (f == NULL)
 		return -ENOBUFS;
 
-- 
2.15.0