linux-kernel - Re: [PATCH] Add "is_power_of

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Message-ID: <Pine.LNX.4.61.0701301512200.1147@yvahk01.tjqt.qr>
Date:	Tue, 30 Jan 2007 15:12:54 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Paul Mackerras <paulus@...ba.org>, dhowells@...hat.com,
	galak@...nel.crashing.org
Subject: Re: [PATCH] Add "is_power_of_2" checking to log2.h.


>> Why the qualifier? Zero *is* not a power of 2, is it?

No, it is not:

	In[1]:= Solve[2^n == 0, n]

	Out[1]= {}

So says Mathematica5.



Jan
-- 
ft: http://freshmeat.net/p/chaostables/
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