From: Salvatore Mesoraca <s.mesorac...@gmail.com>
Date: Sun, 11 Mar 2018 22:12:04 +0100
> Avoid a VLA by using a real constant expression instead of a variable.
> The compiler should be able to optimize the original code and avoid using
> an actual VLA. Anyway this change is useful because it will avoid a false
> positive with -Wvla, it might also help the compiler generating better
>  https://lkml.org/lkml/2018/3/7/621
> Signed-off-by: Salvatore Mesoraca <s.mesorac...@gmail.com>