linux-kernel - Re: [PATCH v2] kernel: module: Use struct

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Date:   Fri, 7 Jun 2019 10:57:46 +0200
From:   Jessica Yu <jeyu@...nel.org>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] kernel: module: Use struct_size() helper

+++ Gustavo A. R. Silva [06/06/19 13:18 -0500]:
>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 module_sect_attrs {
>	...
>        struct module_sect_attr attrs[0];
>};
>
>Make use of the struct_size() helper instead of an open-coded version
>in order to avoid any potential type mistakes.
>
>So, replace the following form:
>
>sizeof(*sect_attrs) + nloaded * sizeof(sect_attrs->attrs[0]
>
>with:
>
>struct_size(sect_attrs, attrs, nloaded)
>
>This code was detected with the help of Coccinelle.
>
>Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>---
>Changes in v2:
> - Update changelog text by adding a better description for
>   the motivation and usage of the struct_size() helper.

Applied. Thanks a lot!

Jessica