[PATCH] Clean up MAX_NR_NODES/NUMNODES/etc. [3/5]

[Matthew Dobson <colpatch@us.ibm.com>]

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Matthew Dobson wrote:
> Ok, I made an attempt to clean up this mess quite a while ago (2.5.47), 
> but that patch is utterly useless now.  At Martin's urging I've created 
> a new series of patches to resolve this.
> 
> 01 - Make sure MAX_NUMNODES is defined in one and only one place. Remove 
> superfluous definitions.  Instead of defining MAX_NUMNODES in 
> asm/numnodes.h, we define NODES_SHIFT there.  Then in linux/mmzone.h we 
> turn that NODES_SHIFT value into MAX_NUMNODES.
> 
> 02 - Remove MAX_NR_NODES.  This value is only used in a couple of 
> places, and it's incorrectly used in all those places as far as I can 
> tell.  Replace with MAX_NUMNODES.  Create MAX_NODES_SHIFT and use this 
> value to check NODES_SHIFT is appropriate.  A possible future patch 
> should make MAX_NODES_SHIFT vary based on 32 vs. 64 bit archs.
> 
> 03 - Fix up the sh arch.  sh defined NR_NODES, change sh to use standard 
> MAX_NUMNODES instead.
> 
> 04 - Fix up the arm arch.  This needs to be reviewed.  Relatively 
> straightforward replacement of NR_NODES with standard MAX_NUMNODES.
> 
> 05 - Fix up the ia64 arch.  This *definitely* needs to be reviewed. This 
> code made my head hurt.  I think I may have gotten it right. Totally 
> untested.

Cheers!

-Matt

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diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.0-test5/include/asm-sh/numnodes.h linux-2.6.0-test5-max_numnodes2nodes_shift/include/asm-sh/numnodes.h
--- linux-2.6.0-test5/include/asm-sh/numnodes.h	Wed Dec 31 16:00:00 1969
+++ linux-2.6.0-test5-max_numnodes2nodes_shift/include/asm-sh/numnodes.h	Fri Sep 12 17:26:31 2003
@@ -0,0 +1,7 @@
+#ifndef _ASM_MAX_NUMNODES_H
+#define _ASM_MAX_NUMNODES_H
+
+/* Max 2 Nodes */
+#define NODES_SHIFT	1
+
+#endif /* _ASM_MAX_NUMNODES_H */
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.0-test5/arch/sh/mm/init.c linux-2.6.0-test5-nr_nodes/arch/sh/mm/init.c
--- linux-2.6.0-test5/arch/sh/mm/init.c	Mon Sep  8 12:50:21 2003
+++ linux-2.6.0-test5-nr_nodes/arch/sh/mm/init.c	Fri Sep 12 17:28:43 2003
@@ -51,8 +51,8 @@ unsigned long mmu_context_cache = NO_CON
 #endif
 
 #ifdef CONFIG_DISCONTIGMEM
-pg_data_t discontig_page_data[NR_NODES];
-bootmem_data_t discontig_node_bdata[NR_NODES];
+pg_data_t discontig_page_data[MAX_NUMNODES];
+bootmem_data_t discontig_node_bdata[MAX_NUMNODES];
 #endif
 
 void show_mem(void)
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.0-test5/include/asm-sh/mmzone.h linux-2.6.0-test5-nr_nodes/include/asm-sh/mmzone.h
--- linux-2.6.0-test5/include/asm-sh/mmzone.h	Mon Sep  8 12:50:27 2003
+++ linux-2.6.0-test5-nr_nodes/include/asm-sh/mmzone.h	Fri Sep 12 17:28:08 2003
@@ -10,14 +10,14 @@
 
 #include <linux/config.h>
 
+#ifdef CONFIG_DISCONTIGMEM
+
 /* Currently, just for HP690 */
 #define PHYSADDR_TO_NID(phys)	((((phys) - __MEMORY_START) >= 0x01000000)?1:0)
-#define NR_NODES 2
 
-extern pg_data_t discontig_page_data[NR_NODES];
-extern bootmem_data_t discontig_node_bdata[NR_NODES];
+extern pg_data_t discontig_page_data[MAX_NUMNODES];
+extern bootmem_data_t discontig_node_bdata[MAX_NUMNODES];
 
-#ifdef CONFIG_DISCONTIGMEM
 /*
  * Following are macros that each numa implmentation must define.
  */
@@ -46,7 +46,7 @@ static inline int is_valid_page(struct p
 {
 	unsigned int i;
 
-	for (i = 0; i < NR_NODES; i++) {
+	for (i = 0; i < MAX_NUMNODES; i++) {
 		if (page >= NODE_MEM_MAP(i) &&
 		    page < NODE_MEM_MAP(i) + NODE_DATA(i)->node_size)
 			return 1;