[PATCH v6] linux: Add openat2 (BZ 31664)

[Paul Eggert]

On 2025-11-10 08:19, Adhemerval Zanella wrote:
> +extern int openat2 (int __dfd, const char *__restrict __filename,
> +		    const struct open_how *__restrict __how,
> +		    size_t __usize)
> +     __nonnull ((2, 3));

Shouldn't this be fortified at compile time, by using 
__builtin_object_size to check that __usize <= sizeof *__how, when 
fortify checking is enabled?