RE: [Pv-drivers] [PATCH] include/log2.h: Fix rounddown_pow_of_two(1)

From: Peter Zijlstra
Date: Tue Dec 13 2011 - 15:08:00 EST


On Tue, 2011-12-13 at 12:06 -0800, Bhavesh Davda wrote:
> > On Mon, 2011-12-12 at 10:02 -0800, Dmitry Torokhov wrote:
> > > 1 is a power of two, therefore rounddown_pow_of_two(1) should return 1.
> >
> > x^0 = 1
> > x^1 = x
> >
> > Seems to me 0 was the right answer, no?
>
> Eh? The answer should be the power-of-two (1), not the exponent (0).

Yeah, just noticed that, see my other reply.
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