On Wed, Oct 4, 2023 at 6:53 PM Matthew Wilcox (Oracle)
<willy@xxxxxxxxxxxxx> wrote:
> Using EOR to clear the guaranteed-to-be-set lock bit will test the
> negative flag just like the x86 implementation. This should be
> more efficient than the generic implementation in filemap.c. It
> would be better if m68k had __GCC_ASM_FLAG_OUTPUTS__.
>
> Coldfire doesn't have a byte-sized EOR, so we test bit 7 after the
> EOR, which is a second memory access, but it's slightly better than
> the current C code.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
