> +static u32 next_random(u32 rand)
> +{
> + u32 y, ylast;
> +
> + y = rand;
> + ylast = y;
> + y = (y * 69069) & 0xffffffff;
> + y = (y & 0x80000000) + (ylast & 0x7fffffff);
> + if ((y & 1))
> + y = ylast ^ (y > 1) ^ (2567483615UL);
> + else
> + y = ylast ^ (y > 1);
> + y = y ^ (y >> 11);
> + y = y ^ ((y >> 7) & 2636928640UL);
> + y = y ^ ((y >> 15) & 4022730752UL);
> + y = y ^ (y << 18);
> + return y;
> +}
How about just using the kernel's random32()?
I haven't read the code really so I don't understand what's being
randomized here, but random32() should be more than good enough for a
typical randomized algorithm().
- R.
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