Index: linux-2.6.15-rc2/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.15-rc2.orig/fs/proc/proc_misc.c	2005-11-20 03:25:03.000000000 +0000
+++ linux-2.6.15-rc2/fs/proc/proc_misc.c	2005-11-23 05:42:10.000000000 +0000
@@ -142,7 +142,7 @@ static int meminfo_read_proc(char *page,
 	allowed = ((totalram_pages - hugetlb_total_pages())
 		* sysctl_overcommit_ratio / 100) + total_swap_pages;
 
-	cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
+	cached = ps.nr_page - total_swapcache_pages - i.bufferram;
 	if (cached < 0)
 		cached = 0;
 
Index: linux-2.6.15-rc2/include/linux/pagemap.h
===================================================================
--- linux-2.6.15-rc2.orig/include/linux/pagemap.h	2005-11-23 05:32:53.000000000 +0000
+++ linux-2.6.15-rc2/include/linux/pagemap.h	2005-11-23 05:40:46.000000000 +0000
@@ -99,11 +99,6 @@ int add_to_page_cache_lru(struct page *p
 extern void remove_from_page_cache(struct page *page);
 extern void __remove_from_page_cache(struct page *page);
 
-static inline unsigned long get_page_cache_size(void)
-{
-	return read_page_state(nr_pagecache);
-}
-
 /*
  * Return byte-offset into filesystem object for page.
  */
Index: linux-2.6.15-rc2/mm/mmap.c
===================================================================
--- linux-2.6.15-rc2.orig/mm/mmap.c	2005-11-20 03:25:03.000000000 +0000
+++ linux-2.6.15-rc2/mm/mmap.c	2005-11-23 05:48:09.000000000 +0000
@@ -95,7 +95,7 @@ int __vm_enough_memory(long pages, int c
 	if (sysctl_overcommit_memory == OVERCOMMIT_GUESS) {
 		unsigned long n;
 
-		free = get_page_cache_size();
+		free = read_page_state(nr_pagecache);
 		free += nr_swap_pages;
 
 		/*