linux-kernel - [PATCH] numa x86_64 use generic percpu var numa_node_id implementation fix3 [was Re: mmotm 2010-05-14-13-33 uploaded]

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Message-Id: <1274147210.24007.146.camel@useless.americas.hpqcorp.net>
Date:	Mon, 17 May 2010 21:46:50 -0400
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] numa x86_64 use generic percpu var numa_node_id
 implementation fix3  [was Re: mmotm 2010-05-14-13-33 uploaded]

On Sun, 2010-05-16 at 16:37 -0700, Randy Dunlap wrote: 
> include/linux/topology.h:248: error: implicit declaration of function 'cpu_to_node'
> 
> 
> config attached.

Hmmm, i386 NUMA.

With the following patch, your config builds correctly.  !NUMA i386
still builds, as well.

Lee

Fix i386 numa build:  define cpu_to_node() stub same as
early_cpu_to_node() for i386 numa builds.  Just return node
from cpu_to_node_map[].

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@...com>

 arch/x86/include/asm/topology.h |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.34-rc7-mmotm-100514-1333/arch/x86/include/asm/topology.h
===================================================================
--- linux-2.6.34-rc7-mmotm-100514-1333.orig/arch/x86/include/asm/topology.h	2010-05-17 08:40:47.000000000 -0400
+++ linux-2.6.34-rc7-mmotm-100514-1333/arch/x86/include/asm/topology.h	2010-05-17 10:49:08.000000000 -0400
@@ -53,10 +53,12 @@
 extern int cpu_to_node_map[];
 
 /* Returns the number of the node containing CPU 'cpu' */
-static inline int early_cpu_to_node(int cpu)
+static inline int __cpu_to_node(int cpu)
 {
 	return cpu_to_node_map[cpu];
 }
+#define early_cpu_to_node __cpu_to_node
+#define cpu_to_node __cpu_to_node
 
 #else /* CONFIG_X86_64 */
 


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