linux-kernel - Re: [RFC PATCH 1/3] cpu-hotplug: Refcount Based Cpu Hotplug implementation

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Message-ID: <20071115160520.GA3969@elte.hu>
Date:	Thu, 15 Nov 2007 17:05:20 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Gautham R Shenoy <ego@...ibm.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Rusty Russel <rusty@...tcorp.com.au>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	Paul E McKenney <paulmck@...ibm.com>,
	Richard Gooch <rgooch@...f.csiro.au>,
	Tigran Aivazian <tigran@...azian.fs.co.uk>,
	Shoahua Li <shaohua.li@...ux.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Nathan Lynch <ntl@...ox.com>, Paul Jackson <pj@....com>,
	Christoph Lameter <clameter@....com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Akinobu Mita <akinobu.mita@...il.com>
Subject: Re: [RFC PATCH 1/3] cpu-hotplug: Refcount Based Cpu Hotplug
	implementation


* Ingo Molnar <mingo@...e.hu> wrote:

> FYI, i've put these 3 patches into the scheduler git tree and it's 
> looking very good so far. So unless Andrew or Linus objects to put 
> this into v2.6.24, or there's serious questions during review, could 
> we merge it this way?

i've got this trivial build fix for !SMP - otherwise it's still looking 
good.

	Ingo

------------------>
Subject: cpu hotplug: fix build on !CONFIG_SMP
From: Ingo Molnar <mingo@...e.hu>

fix build on !CONFIG_SMP.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 include/linux/cpu.h |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Index: linux/include/linux/cpu.h
===================================================================
--- linux.orig/include/linux/cpu.h
+++ linux/include/linux/cpu.h
@@ -71,19 +71,25 @@ static inline void unregister_cpu_notifi
 
 int cpu_up(unsigned int cpu);
 
+extern void cpu_hotplug_init(void);
+
 #else
 
 static inline int register_cpu_notifier(struct notifier_block *nb)
 {
 	return 0;
 }
+
 static inline void unregister_cpu_notifier(struct notifier_block *nb)
 {
 }
 
+static inline void cpu_hotplug_init(void)
+{
+}
+
 #endif /* CONFIG_SMP */
 extern struct sysdev_class cpu_sysdev_class;
-extern void cpu_hotplug_init(void);
 extern void cpu_maps_update_begin(void);
 extern void cpu_maps_update_done(void);
 
-
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