linux-kernel - Re: powerpc/ps3: Use struct

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Date:   Thu, 24 Jan 2019 14:40:20 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Geoff Levand <geoff@...radead.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: Re: powerpc/ps3: Use struct_size() in kzalloc()

On Tue, 2019-01-08 at 21:00:10 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 = 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@...eddedor.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/31367b9a01d6a3f4f77694bd44f547d6

cheers