Re: [PATCH] m68k: Unroll raw_outsb() loop

[Geert Uytterhoeven]

On Sat, Oct 13, 2018 at 3:10 AM Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx> wrote:
> Unroll the raw_outsb() loop using the optimized assembler code from
> raw_outsw(). That code is copied and pasted, with movew changed to moveb.
>
> This improves the performance of sequential write transfers using mac_esp
> in PIO mode by 5% or 10%. (The DMA controller on the 840av/660av models is
> still unsupported so PIO transfers are used.)
>
> Tested-by: Stan Johnson <userm57@xxxxxxxxx>
> Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>

Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
I.e., applied and queued for v4.21.

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