Optimise a few things in the page allocator.

Index: linux-2.6/mm/bootmem.c
===================================================================
--- linux-2.6.orig/mm/bootmem.c
+++ linux-2.6/mm/bootmem.c
@@ -19,7 +19,6 @@
 #include <linux/module.h>
 #include <asm/dma.h>
 #include <asm/io.h>
-#include "internal.h"
 
 /*
  * Access to this subsystem has to be serialized externally. (this is
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -37,7 +37,6 @@
 #include <linux/vmalloc.h>
 
 #include <asm/tlbflush.h>
-#include "internal.h"
 
 /*
  * MCD - HACK: Find somewhere to initialize this EARLY, or make this
@@ -78,6 +77,7 @@ int min_free_kbytes = 1024;
 unsigned long __initdata nr_kernel_pages;
 unsigned long __initdata nr_all_pages;
 
+#if 0
 /*
  * Temporary debugging check for pages not lying within a given zone.
  */
@@ -95,6 +95,12 @@ static int bad_range(struct zone *zone, 
 		return 1;
 	return 0;
 }
+#else
+static inline int bad_range(struct zone *zone, struct page *page)
+{
+	return 0;
+}
+#endif
 
 static void bad_page(const char *function, struct page *page)
 {
@@ -424,31 +430,14 @@ expand(struct zone *zone, struct page *p
 	return page;
 }
 
-void set_page_refs(struct page *page, int order)
-{
-#ifdef CONFIG_MMU
-	set_page_count(page, 1);
-#else
-	int i;
-
-	/*
-	 * We need to reference all the pages for this order, otherwise if
-	 * anyone accesses one of the pages with (get/put) it will be freed.
-	 * - eg: access_process_vm()
-	 */
-	for (i = 0; i < (1 << order); i++)
-		set_page_count(page + i, 1);
-#endif /* CONFIG_MMU */
-}
-
 /*
  * This page is about to be returned from the page allocator
  */
 static void prep_new_page(struct page *page, int order)
 {
-	if (	page_mapcount(page) ||
-		page->mapping != NULL ||
-		page_count(page) != 0 ||
+	if (unlikely(page_mapcount(page) |
+		(page->mapping != NULL)  |
+		(page_count(page) != 0)  |
 		(page->flags & (
 			1 << PG_lru	|
 			1 << PG_private	|
@@ -459,7 +448,7 @@ static void prep_new_page(struct page *p
 			1 << PG_slab    |
 			1 << PG_swapcache |
 			1 << PG_writeback |
-			1 << PG_reserved )))
+			1 << PG_reserved ))))
 		bad_page(__FUNCTION__, page);
 
 	page->flags &= ~(1 << PG_uptodate | 1 << PG_error |
Index: linux-2.6/mm/internal.h
===================================================================
--- linux-2.6.orig/mm/internal.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* internal.h: mm/ internal definitions
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-/* page_alloc.c */
-extern void set_page_refs(struct page *page, int order);
Index: linux-2.6/include/linux/mm.h
===================================================================
--- linux-2.6.orig/include/linux/mm.h
+++ linux-2.6/include/linux/mm.h
@@ -315,6 +315,23 @@ struct page {
 #define set_page_count(p,v) 	atomic_set(&(p)->_count, v - 1)
 #define __put_page(p)		atomic_dec(&(p)->_count)
 
+static inline void set_page_refs(struct page *page, int order)
+{
+#ifdef CONFIG_MMU
+	set_page_count(page, 1);
+#else
+	int i;
+
+	/*
+	 * We need to reference all the pages for this order, otherwise if
+	 * anyone accesses one of the pages with (get/put) it will be freed.
+	 * - eg: access_process_vm()
+	 */
+	for (i = 0; i < (1 << order); i++)
+		set_page_count(page + i, 1);
+#endif /* CONFIG_MMU */
+}
+
 extern void FASTCALL(__page_cache_release(struct page *));
 
 #ifdef CONFIG_HUGETLB_PAGE