Re: [PATCH v2] mm: kmalloc_index: make compiler break when size is not supported

[Matthew Wilcox]

On Tue, May 11, 2021 at 12:02:30AM +0900, Hyeonggon Yoo wrote:
> @@ -382,8 +385,8 @@ static __always_inline unsigned int kmalloc_index(size_t size)
>  	if (size <=  8 * 1024 * 1024) return 23;
>  	if (size <=  16 * 1024 * 1024) return 24;
>  	if (size <=  32 * 1024 * 1024) return 25;
> -	if (size <=  64 * 1024 * 1024) return 26;
> -	BUG();
> +
> +	BUILD_BUG_ON_MSG(1, "unexpected size in kmalloc_index()");

we're being encouraged to use static_assert() these days.
https://en.cppreference.com/w/c/language/_Static_assert