netdev - Re: [PATCH net-next] nfp: use struct

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Date:   Wed, 30 Jan 2019 18:57:46 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     "David S. Miller" <davem@...emloft.net>, oss-drivers@...ronome.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] nfp: use struct_size() in kzalloc()



On 1/30/19 6:52 PM, Jakub Kicinski wrote:
> On Wed, 30 Jan 2019 18:38:59 -0600, 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;
>>     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@...eddedor.com>
> 
> Acked-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> 

Thanks, Jakub.

--
Gustavo