linux-kernel - Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

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Date:	Wed, 31 Oct 2007 17:53:23 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	David Miller <davem@...emloft.net>
cc:	akpm@...ux-foundation.org, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, mathieu.desnoyers@...ymtl.ca,
	penberg@...helsinki.fi
Subject: Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu
 access overhead

> This patch fixes build failures with DEBUG_VM disabled.

Well there is more there. Last minute mods sigh. With DEBUG_VM you likely 
need this patch.


---
 include/linux/percpu.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/include/linux/percpu.h
===================================================================
--- linux-2.6.orig/include/linux/percpu.h	2007-10-31 17:48:38.020499686 -0700
+++ linux-2.6/include/linux/percpu.h	2007-10-31 17:51:01.423372247 -0700
@@ -36,7 +36,7 @@
 #ifdef CONFIG_DEBUG_VM
 #define __percpu_disguise(pdata) ((void *)~(unsigned long)(pdata))
 #else
-#define __percpu_disguide(pdata) ((void *)(pdata))
+#define __percpu_disguise(pdata) ((void *)(pdata))
 #endif
 
 /* 
@@ -53,7 +53,7 @@
 
 #define this_cpu_ptr(ptr)           			\
 ({							\
-	void *p = ptr;					\
+	void *p = __percpu_disguise(ptr);		\
     	(__typeof__(ptr))(p + this_cpu_offset());	\
 })
 
-
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