netdev - Re: [PATCH] iwlwifi: eeprom-parse: use struct

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Message-ID: <4ecfc417-350d-4078-8ac4-3f79fd279413@embeddedor.com>
Date:   Tue, 29 Jan 2019 10:36:46 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Luciano Coelho <luciano.coelho@...el.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: eeprom-parse: use struct_size() in kzalloc()



On 1/22/19 4:58 AM, Luciano Coelho wrote:
> On Tue, 2019-01-08 at 11:17 -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;
>>     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 our internal tree, thanks! It will reach the mainline
> following our normal upstreaming process.
> 

Great. :)

Thanks, Luca.

--
Gustavo