On Thu, May 24, 2012 at 2:53 AM, Michael Schmitz
<[email protected]> wrote:
> +#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
> +/*
> + * The simpler m68k and ColdFire processors do not have a 32*32->64
> + * multiply instruction. So we need to handle them a little differently.
> + * We use a bit of shifting and a single 32*32->32 multiply to get close.
> + * This is a macro so that the const version can factor out the first
> + * multiply and shift.
> + */
> +#define HZSCALE (268435456 / (1000000 / HZ))
> +
> +#define ndelay(n) __delay( DIV_ROUND_UP( (n) * ((((HZSCALE) >> 11) *
> (loops_per_jiffy >> 11)) >> 6), 1000 ) );
> +
> +#endif
Why do you need this? CONFIG_M68000 and CONFIG_COLDFIRE are not set?
You end up using the default implementation in include/linux/delay.h.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
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
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