Re: [PATCH][next] mm/memremap: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

[Kees Cook]

On Sat, Sep 03, 2022 at 12:17:18AM +0100, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length array
> declaration in struct dev_pagemap with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for a flexible-array member in a union.
> 
> Also, this addresses multiple warnings reported when building
> with Clang-15 and -Wzero-length-array.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook