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Subject: Re: [PATCH] qtnfmac: use struct_size() in kzalloc()
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <20190108172632.GA2918@embeddedor>
References: <20190108172632.GA2918@embeddedor>
To:     "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc:     Igor Mitsyanko <imitsyanko@quantenna.com>,
        Avinash Patil <avinashp@quantenna.com>,
        Sergey Matyukevich <smatyukevich@quantenna.com>,
        "David S. Miller" <davem@davemloft.net>,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>
User-Agent: pwcli/0.0.0-git (https://github.com/kvalo/pwcli/) Python/2.7.12
Message-Id: <20190201120608.2BE8760987@smtp.codeaurora.org>
Date:   Fri,  1 Feb 2019 12:06:08 +0000 (UTC)
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote:

> 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;
>     void *entry[];
> };
> 
> instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, 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>
> Reviewed-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>

Patch applied to wireless-drivers-next.git, thanks.

db040dfa53e2 qtnfmac: use struct_size() in kzalloc()

-- 
https://patchwork.kernel.org/patch/10752601/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches