linux-kernel - [patch 1/4] x86_64 acpi: define and use LOCAL_DISTANCE and REMOTE

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Message-ID: <Pine.LNX.4.64.0705070028560.1899@chino.kir.corp.google.com>
Date:	Mon, 7 May 2007 09:34:55 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Andi Kleen <ak@...e.de>
cc:	linux-kernel@...r.kernel.org
Subject: [patch 1/4] x86_64 acpi: define and use LOCAL_DISTANCE and
 REMOTE_DISTANCE

Export {LOCAL,REMOTE}_DISTANCE to x86_64 ACPI code.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 arch/x86_64/mm/srat.c    |    6 +++---
 include/linux/topology.h |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -106,9 +106,9 @@ static __init int slit_valid(struct acpi_table_slit *slit)
 		for (j = 0; j < d; j++)  {
 			u8 val = slit->entry[d*i + j];
 			if (i == j) {
-				if (val != 10)
+				if (val != LOCAL_DISTANCE)
 					return 0;
-			} else if (val <= 10)
+			} else if (val <= LOCAL_DISTANCE)
 				return 0;
 		}
 	}
@@ -464,7 +464,7 @@ int __node_distance(int a, int b)
 	int index;
 
 	if (!acpi_slit)
-		return a == b ? 10 : 20;
+		return a == b ? LOCAL_DISTANCE : REMOTE_DISTANCE;
 	index = acpi_slit->locality_count * node_to_pxm(a);
 	return acpi_slit->entry[index + node_to_pxm(b)];
 }
diff --git a/include/linux/topology.h b/include/linux/topology.h
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -50,10 +50,10 @@
 	for_each_online_node(node)						\
 		if (nr_cpus_node(node))
 
-#ifndef node_distance
 /* Conform to ACPI 2.0 SLIT distance definitions */
 #define LOCAL_DISTANCE		10
 #define REMOTE_DISTANCE		20
+#ifndef node_distance
 #define node_distance(from,to)	((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
 #endif
 #ifndef RECLAIM_DISTANCE
-
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