From: Matthew Wilcox <willy@debian.org>
To: linux-ia64@vger.kernel.org
Subject: Re: free bootmem feedback patch
Date: Fri, 16 Jul 2004 00:18:51 +0000 [thread overview]
Message-ID: <20040716001851.GR32326@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <40F46962.4090604@sgi.com>
On Thu, Jul 15, 2004 at 05:09:00PM -0700, David Mosberger wrote:
> >>>>> On Fri, 16 Jul 2004 00:34:20 +0100, Matthew Wilcox <willy@debian.org> said:
>
> Matthew> #define log2(x) (ffs(x) - 1)
>
> At the risk of pointing out the obvious, this definition only works
> for integer-powers of two...
>
> get_order() works for any "unsigned long" value.
Oh, um, I didn't realise that ffs() worked backwards. fls() - 1, then.
--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
next prev parent reply other threads:[~2004-07-16 0:18 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-13 22:59 free bootmem feedback patch Joshua Aas
2004-07-13 23:14 ` Luck, Tony
2004-07-13 23:52 ` Joshua Aas
2004-07-14 8:44 ` Andi Kleen
2004-07-14 9:17 ` William Lee Irwin III
2004-07-14 9:19 ` William Lee Irwin III
2004-07-14 16:17 ` Joshua Aas
2004-07-14 18:34 ` Luck, Tony
2004-07-14 22:12 ` William Lee Irwin III
2004-07-15 19:11 ` Luck, Tony
2004-07-15 19:31 ` Matthew Wilcox
2004-07-15 20:21 ` David Mosberger
2004-07-15 23:16 ` William Lee Irwin III
2004-07-15 23:34 ` Matthew Wilcox
2004-07-15 23:53 ` Luck, Tony
2004-07-16 0:09 ` David Mosberger
2004-07-16 0:11 ` William Lee Irwin III
2004-07-16 0:18 ` Matthew Wilcox [this message]
2004-07-16 0:18 ` William Lee Irwin III
2004-08-03 17:53 ` Josh Aas
2004-08-03 23:53 ` William Lee Irwin III
2004-08-06 14:11 ` Josh Aas
2004-08-06 14:17 ` William Lee Irwin III
2004-08-06 17:58 ` Luck, Tony
2004-08-06 18:27 ` Josh Aas
2004-08-06 20:09 ` Luck, Tony
2004-08-06 20:51 ` William Lee Irwin III
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