linux-kernel - [PATCH 1/9] include/linux/cpu.h: Define architecture dependent cpu map update and state check functions

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Date:	Fri,  4 Nov 2011 15:03:53 -0700
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"Thomas Gleixner" <tglx@...utronix.de>,
	"H Peter Anvin" <hpa@...or.com>, "Ingo Molnar" <mingo@...e.hu>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Tony Luck" <tony.luck@...el.com>,
	"Suresh B Siddha" <suresh.b.siddha@...el.com>,
	"Len Brown" <len.brown@...el.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH 1/9] include/linux/cpu.h: Define architecture dependent cpu map update and state check functions

From: Fenghua Yu <fenghua.yu@...el.com>

arch_cpu_maps_update_begin() and arch_cpu_maps_update_done() are architecture
dependent cpu map update functions which are called during cpu_up() and
cpu_down().

arch_state_check() is architecture dependent state check function which is
called during hibernate and suspend.

They are empty __weak functions and are overriden in x86.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
---
 include/linux/cpu.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index b1a635a..88a6390 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -137,6 +137,8 @@ int cpu_up(unsigned int cpu);
 void notify_cpu_starting(unsigned int cpu);
 extern void cpu_maps_update_begin(void);
 extern void cpu_maps_update_done(void);
+extern void arch_cpu_maps_update_begin(void);
+extern void arch_cpu_maps_update_done(void);
 
 #else	/* CONFIG_SMP */
 
@@ -207,4 +209,8 @@ static inline int disable_nonboot_cpus(void) { return 0; }
 static inline void enable_nonboot_cpus(void) {}
 #endif /* !CONFIG_PM_SLEEP_SMP */
 
+#ifdef CONFIG_PM
+extern int  arch_state_check(void);
+#endif
+
 #endif /* _LINUX_CPU_H_ */
-- 
1.6.0.3

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