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Date:   Mon, 17 Feb 2020 10:38:43 +0100
From:   Bartosz Golaszewski <>
To:     "Gustavo A. R. Silva" <>
Cc:     Linus Walleij <>,
        Masahiro Yamada <>,
        linux-gpio <>,
        arm-soc <>,
        LKML <>
Subject: Re: [PATCH] gpio: uniphier: Replace zero-length array with
 flexible-array member

wt., 11 lut 2020 o 22:03 Gustavo A. R. Silva <>
> The current codebase makes use of the zero-length array language
> extension to the C90 standard, but the preferred mechanism to declare
> variable-length types such as these ones is a flexible array member[1][2],
> introduced in C99:
> struct foo {
>         int stuff;
>         struct boo array[];
> };
> By making use of the mechanism above, we will get a compiler warning
> in case the flexible array does not occur last in the structure, which
> will help us prevent some kind of undefined behavior bugs from being
> inadvertenly introduced[3] to the codebase from now on.
> This issue was found with the help of Coccinelle.
> [1]
> [2]
> [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
> Signed-off-by: Gustavo A. R. Silva <>

Patch applied, thanks!


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