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

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Message-ID: <36d34731-e072-452b-48b8-9e68773c5425@embeddedor.com>
Date:   Thu, 24 Jan 2019 11:38:45 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Michael Ellerman <patch-notifications@...erman.id.au>,
        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
Subject: Re: powerpc/ps3: Use struct_size() in kzalloc()



On 1/23/19 9:40 PM, Michael Ellerman wrote:
> 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
> 

Thanks, Michael.

--
Gustavo