On Wed, Sep 11, 2013 at 8:49 AM, Stephan Mueller <smuel...@chronox.de> wrote:
> __u64 tmp = random_get_fast_cycles() - random_get_fast_cycles();
> if(0 == tmp)
> return fail;
> return pass;
That will fail if the cycle counter runs at less than say 4 times the
CPU clock...
BTW, I prefer a different name than "random_get_fast_cycles()", as it's better
to have something that returns different and unpredictable numbers than an
actual monotonic cycle counter.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
