[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>

13 files changed, 3 insertions, 134 deletions

diff --git a/include/asm-alpha/numnodes.h b/include/asm-alpha/numnodes.h
deleted file mode 100644
index cd425827e4f..00000000000
--- a/include/asm-alpha/numnodes.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-/* Max 128 Nodes - Marvel */
-#define NODES_SHIFT	7
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-arm/arch-lh7a40x/memory.h b/include/asm-arm/arch-lh7a40x/memory.h
index c92bcb83762..9f1a58cbf40 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 8df36818ebc..00000000000
--- 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
diff --git a/include/asm-i386/numnodes.h b/include/asm-i386/numnodes.h
deleted file mode 100644
index a61f38c8176..00000000000
--- a/include/asm-i386/numnodes.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-#include <linux/config.h>
-
-#ifdef CONFIG_X86_NUMAQ
-
-/* Max 16 Nodes */
-#define NODES_SHIFT	4
-
-#elif defined(CONFIG_ACPI_SRAT)
-
-/* Max 8 Nodes */
-#define NODES_SHIFT	3
-
-#endif /* CONFIG_X86_NUMAQ */
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-ia64/numnodes.h b/include/asm-ia64/numnodes.h
deleted file mode 100644
index e9d356f549d..00000000000
--- a/include/asm-ia64/numnodes.h
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-#ifdef CONFIG_IA64_DIG
-/* Max 8 Nodes */
-#  define NODES_SHIFT	3
-#elif defined(CONFIG_IA64_HP_ZX1) || defined(CONFIG_IA64_HP_ZX1_SWIOTLB)
-/* Max 32 Nodes */
-#  define NODES_SHIFT	5
-#elif defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
-#  if CONFIG_IA64_NR_NODES == 256
-#    define NODES_SHIFT	8
-#  elif CONFIG_IA64_NR_NODES <= 512
-#    define NODES_SHIFT    9
-#  elif CONFIG_IA64_NR_NODES <= 1024
-#    define NODES_SHIFT    10
-#  endif
-#endif
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-m32r/numnodes.h b/include/asm-m32r/numnodes.h
deleted file mode 100644
index 479a39d49f8..00000000000
--- a/include/asm-m32r/numnodes.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef _ASM_NUMNODES_H_
-#define _ASM_NUMNODES_H_
-
-#include <linux/config.h>
-
-#ifdef CONFIG_DISCONTIGMEM
-
-#if defined(CONFIG_CHIP_M32700)
-#define	NODES_SHIFT	1	/* Max 2 Nodes */
-#endif	/* CONFIG_CHIP_M32700 */
-
-#endif	/* CONFIG_DISCONTIGMEM */
-
-#endif	/* _ASM_NUMNODES_H_ */
-
diff --git a/include/asm-mips/numnodes.h b/include/asm-mips/numnodes.h
deleted file mode 100644
index 4f00c16ceeb..00000000000
--- a/include/asm-mips/numnodes.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-/* Max 128 Nodes */
-#define NODES_SHIFT	6
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-parisc/numnodes.h b/include/asm-parisc/numnodes.h
deleted file mode 100644
index 6c67651efd1..00000000000
--- a/include/asm-parisc/numnodes.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-/* Max 8 Nodes */
-#define NODES_SHIFT	3
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-powerpc/numnodes.h b/include/asm-powerpc/numnodes.h
deleted file mode 100644
index e138edae09d..00000000000
--- a/include/asm-powerpc/numnodes.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef _ASM_POWERPC_MAX_NUMNODES_H
-#define _ASM_POWERPC_MAX_NUMNODES_H
-#ifdef __KERNEL__
-
-/* Max 16 Nodes */
-#define NODES_SHIFT	4
-
-#endif /* __KERNEL__ */
-#endif /* _ASM_POWERPC_MAX_NUMNODES_H */
diff --git a/include/asm-sh/numnodes.h b/include/asm-sh/numnodes.h
deleted file mode 100644
index f73e85b72ec..00000000000
--- a/include/asm-sh/numnodes.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_MAX_NUMNODES_H
-#define _ASM_MAX_NUMNODES_H
-
-/* Max 2 Nodes */
-#define NODES_SHIFT	1
-
-#endif /* _ASM_MAX_NUMNODES_H */
diff --git a/include/asm-x86_64/numa.h b/include/asm-x86_64/numa.h
index f0ba4d984bd..1cc92fe0250 100644
--- a/include/asm-x86_64/numa.h
+++ b/include/asm-x86_64/numa.h
@@ -2,7 +2,6 @@
 #define _ASM_X8664_NUMA_H 1
 
 #include <linux/nodemask.h>
-#include <asm/numnodes.h>
 
 struct bootnode {
 	u64 start,end; 
diff --git a/include/asm-x86_64/numnodes.h b/include/asm-x86_64/numnodes.h
deleted file mode 100644
index 5a1d506b829..00000000000
--- a/include/asm-x86_64/numnodes.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef _ASM_X8664_NUMNODES_H
-#define _ASM_X8664_NUMNODES_H 1
-
-#include <linux/config.h>
-
-#ifdef CONFIG_NUMA
-#define NODES_SHIFT	6
-#endif
-
-#endif
diff --git a/include/linux/numa.h b/include/linux/numa.h
index f0c539bd3cf..e481feb1bfd 100644
--- a/include/linux/numa.h
+++ b/include/linux/numa.h
@@ -3,11 +3,9 @@
 
 #include <linux/config.h>
 
-#ifndef CONFIG_FLATMEM
-#include <asm/numnodes.h>
-#endif
-
-#ifndef NODES_SHIFT
+#ifdef CONFIG_NODES_SHIFT
+#define NODES_SHIFT     CONFIG_NODES_SHIFT
+#else
 #define NODES_SHIFT     0
 #endif