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In-Reply-To: <20190108183720.GA14238@embeddedor>
To:     "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Jeremy Kerr <jk@ozlabs.org>, Arnd Bergmann <arnd@arndb.de>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>
From:   Michael Ellerman <patch-notifications@ellerman.id.au>
Cc:     linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: Re: powerpc/spufs: use struct_size() in kmalloc()
Message-Id: <43lSbR6CTJz9s55@ozlabs.org>
Date:   Thu, 24 Jan 2019 14:40:19 +1100 (AEDT)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, 2019-01-08 at 18:37:20 UTC, "Gustavo A. R. Silva" 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 = kmalloc(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 = kmalloc(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 to powerpc next, thanks.

https://git.kernel.org/powerpc/c/00def7130af8b3fad1bdef98429c94a6

cheers