Re: [PATCH 1/9] mm/maccess: fix unaligned copy_{from,to}_kernel_nofault

Linus Walleij
2020-09-27T09:25:40Z

On Mon, Sep 7, 2020 at 5:37 PM Arnd Bergmann <arnd@arndb.de> wrote:

> On machines such as ARMv5 that trap unaligned accesses, these
> two functions can be slow when each access needs to be emulated,
> or they might not work at all.
>
> Change them so that each loop is only used when both the src
> and dst pointers are naturally aligned.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

That's a clever optimization idea, nice!
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij