linux-kernel - Re: [PATCH] x86: Voluntary leave

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Date:	Wed, 19 Dec 2007 21:54:32 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Len Brown <lenb@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: Voluntary leave_mm before entering ACPI C3


FYI, your patch needed the fix below for !SMP. It works fine otherwise.

	Ingo

---
 include/asm-x86/mmu.h |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux/include/asm-x86/mmu.h
===================================================================
--- linux.orig/include/asm-x86/mmu.h
+++ linux/include/asm-x86/mmu.h
@@ -20,6 +20,12 @@ typedef struct { 
 	void *vdso;
 } mm_context_t;
 
+#ifdef CONFIG_SMP
 void leave_mm(int cpu);
+#else
+static inline void leave_mm(int cpu)
+{
+}
+#endif
 
 #endif /* _ASM_X86_MMU_H */
--
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