linux-kernel - Re: [PATCH] clk: imx: imx7ulp: use struct

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Message-ID: <50cb397d-5e41-834d-3a6d-00e1c4efb042@embeddedor.com>
Date:   Thu, 24 Jan 2019 13:39:10 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Stephen Boyd <sboyd@...nel.org>,
        Fabio Estevam <fabio.estevam@....com>,
        Michael Turquette <mturquette@...libre.com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: imx: imx7ulp: use struct_size() in kzalloc()



On 1/24/19 1:37 PM, Stephen Boyd wrote:
> Quoting Gustavo A. R. Silva (2018-12-23 22:40:25)
>> 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 issue was detected with the help of Coccinelle.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>> ---
> 
> Applied to clk-next
> 

Thanks, Stephen.

--
Gustavo