Re: [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page

[Segher Boessenkool]

On Fri, Jan 31, 2020 at 03:37:34PM +0000, Christophe Leroy wrote:
> When the range is a single page, do a page flush instead.

> +     start &= PAGE_MASK;
> +     end = (end - 1) | ~PAGE_MASK;
>       if (!Hash) {
> -             _tlbia();
> +             if (end - start == PAGE_SIZE)
> +                     _tlbie(start);
> +             else
> +                     _tlbia();
>               return;
>       }

For just one page, you get  end - start == 0  actually?


Segher