Re: [PATCH 5/6] [v2] asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user

[Christoph Hellwig]

On Sat, May 15, 2021 at 12:18:02PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> Consolidate the asm-generic implementation with the library version
> that is used everywhere else.
> 
> These are the three versions for NOMMU kernels,

I don't get the three versions part?

> +	select GENERIC_STRNCPY_FROM_USER
> +	select GENERIC_STRNLEN_USER

Given that most architetures select the generic version I wonder
if it might be worth to add another patch to invert the logic so
that architectures with their own implementation need to sekect a symbol.

> +extern long strncpy_from_user(char *dst, const char __user *src, long count);
> +extern long strnlen_user(const char __user *src, long n);

No need for the extern here.