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Date:   Wed, 16 Jan 2019 21:11:47 -0800 (PST)
Message-Id: <20190116.211147.804387430896252660.davem@davemloft.net>
To:     gustavo@embeddedor.com
Cc:     pshelar@ovn.org, netdev@vger.kernel.org, dev@openvswitch.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next] openvswitch: meter: Use struct_size() in
 kzalloc()
From:   David Miller <davem@davemloft.net>
In-Reply-To: <20190115211917.GA17058@embeddedor>
References: <20190115211917.GA17058@embeddedor>
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From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Tue, 15 Jan 2019 15:19:17 -0600

> One of the more common cases of allocation size calculations is finding the
> size of a structure that has a zero-sized array at the end, along with memory
> for some number of elements for that array. For example:
> 
> struct foo {
>     int stuff;
>     struct boo entry[];
> };
> 
> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
> 
> Instead of leaving these open-coded and prone to type mistakes, we can now
> use the new struct_size() helper:
> 
> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
> 
> This code was detected with the help of Coccinelle.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

Applied.