[PATCH] Configurable NODES_SHIFT

Current implementations define NODES_SHIFT in include/asm-xxx/numnodes.h for
each arch.  Its definition is sometimes configurable.  Indeed, ia64 defines 5
NODES_SHIFT values in the current git tree.  But it looks a bit messy.

SGI-SN2(ia64) system requires 1024 nodes, and the number of nodes already has
been changeable by config.  Suitable node's number may be changed in the
future even if it is other architecture.  So, I wrote configurable node's
number.

This patch set defines just default value for each arch which needs multi
nodes except ia64.  But, it is easy to change to configurable if necessary.

On ia64 the number of nodes can be already configured in generic ia64 and SN2
config.  But, NODES_SHIFT is defined for DIG64 and HP'S machine too.  So, I
changed it so that all platforms can be configured via CONFIG_NODES_SHIFT.  It
would be simpler.

See also: http://marc.theaimsgroup.com/?l=linux-kernel&m=114358010523896&w=2

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 0 insertions, 28 deletions

diff --git a/include/asm-arm/arch-lh7a40x/memory.h b/include/asm-arm/arch-lh7a40x/memory.h
index c92bcb837629..9f1a58cbf407 100644
--- a/include/asm-arm/arch-lh7a40x/memory.h
+++ b/include/asm-arm/arch-lh7a40x/memory.h
@@ -31,8 +31,6 @@
 
 #ifdef CONFIG_DISCONTIGMEM
 
-#define NODES_SHIFT     4       /* Up to 16 nodes */
-
 /*
  * Given a kernel address, find the home node of the underlying memory.
  */
diff --git a/include/asm-arm/numnodes.h b/include/asm-arm/numnodes.h
deleted file mode 100644
index 8df36818ebc9..000000000000
--- a/include/asm-arm/numnodes.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- *  linux/include/asm-arm/numnodes.h
- *
- *  Copyright (C) 2002 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/* This declaration for the size of the NUMA (CONFIG_DISCONTIGMEM)
- * memory node table is the default.
- *
- * A good place to override this value is include/asm/arch/memory.h.
- */
-
-#ifndef __ASM_ARM_NUMNODES_H
-#define __ASM_ARM_NUMNODES_H
-
-#include <asm/memory.h>
-
-#ifndef NODES_SHIFT
-# define NODES_SHIFT    2       /* Normally, Max 4 Nodes */
-#endif
-
-#endif