linux-kernel - Re: [PATCH 1/1] cpumask: Change cpumask_of_cpu to use cpumask_of_cpu

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Message-ID: <20080730185003.GA18162@codemonkey.org.uk>
Date:	Wed, 30 Jul 2008 14:50:03 -0400
From:	Dave Jones <davej@...emonkey.org.uk>
To:	Mike Travis <travis@....com>
Cc:	Ingo Molnar <mingo@...e.hu>, Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, Jack Steiner <steiner@....com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>,
	Lennert Buytenhek <kernel@...tstofly.org>,
	Paul Jackson <pj@....com>, Tony Luck <tony.luck@...el.com>,
	Tigran Aivazian <tigran@...azian.fsnet.co.uk>,
	Paul Mackerras <paulus@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Robert Richter <robert.richter@....com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Sam Creasey <sammy@...my.net>, Greg Banks <gnb@....com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Adrian Bunk <bunk@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andreas Schwab <schwab@...e.de>,
	Johannes Weiner <hannes@...urebad.de>
Subject: Re: [PATCH 1/1] cpumask: Change cpumask_of_cpu to use
	cpumask_of_cpu_map

On Wed, Jul 30, 2008 at 11:37:52AM -0700, Mike Travis wrote:
 
 > >> I've lost the plot on what's going on with these cpumask patches.
 > >> But I just saw this on -rc1.
 > >>
 > >> arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c:206:33: error: not addressable
 > >> arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c:274:32: error: not addressable
 > >> arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c:352:34: error: not addressable
 > >>
 > 
 > After I recreated linux-next the changes all appear to be there now.
 > One problem though, is !SMP config does not build (something about
 > DECLARE_BITMAP with NR_CPUS=1.)  I wasn't sure how to create a constant
 > "(cpumask_t)1" that worked as an lvalue, so the following patch is
 > somewhat a kluge, but fulfills the requirements.
 > 
 > If anyone has a better suggestion, please let me know.
 > 
 > Subject: [PATCH] cpmask: add cpumask_of_cpu(0) for non-SMP
 > 
 >   * Fix cpumask_of_cpu(0) when CONFIG_SMP is not set by providing a
 >     pointer to a cpumask_t with cpu 0 bit set.

confused.  I saw the error above with a make allyesconfig, which
sets CONFIG_SMP=y

	Dave

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