Re: [PATCH] drm/amd/powerplay/smu10_hwmgr: use struct_size() in kzalloc()

[Gustavo A. R. Silva]

On 2/19/19 1:51 PM, Alex Deucher wrote:
> On Tue, Feb 19, 2019 at 1:55 PM Gustavo A. R. Silva
> <gustavo@xxxxxxxxxxxxxx> 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[];
>> };
>>
>> size = sizeof(struct foo) + count * sizeof(struct boo);
>> instance = kzalloc(size, 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);
>>
>> Notice that, in this case, variable table_size is not necessary, hence
>> it is removed.
>>
>> This code was detected with the help of Coccinelle.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> 
> Applied this and the smu8 patch.  Thanks!
> 
Great!

Thanks, Alex.

--
Gustavo