Re: [PATCH] iov_iter: separate direction from flavour

[Linus Torvalds]

On Sun, Jul 4, 2021 at 2:47 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>
> How about the following ?
>
>         WARN_ON_ONCE(IS_ENABLED(CONFIG_MMU) && uaccess_kernel());

Nope, that doesn't work either, because there are no-MMU setups that
don't make the same mistake no-mmu arm and m68k do.

Example: xtensa. But afaik also generic-asm/uaccess.h unless the
architecture overrides something.

So this literally seems like just an arm/m68k bug.

         Linus