From c1f60a5a419cc60aff27daffb150f5a3a3a79ef4 Mon Sep 17 00:00:00 2001
From: Christoph Lameter <clameter@sgi.com>
Date: Mon, 25 Sep 2006 23:31:11 -0700
Subject: [PATCH] [PATCH] reduce MAX_NR_ZONES: move HIGHMEM counters into
highmem.c/.h
Move totalhigh_pages and nr_free_highpages() into highmem.c/.h
Move the totalhigh_pages definition into highmem.c/.h. Move the
nr_free_highpages function into highmem.c
[yoichi_yuasa@tripeaks.co.jp: build fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/mips/sgi-ip27/ip27-memory.c | 1 +
arch/um/kernel/mem.c | 2 ++
include/linux/highmem.h | 3 +++
include/linux/swap.h | 1 -
mm/highmem.c | 13 +++++++++++++
mm/page_alloc.c | 15 ---------------
mm/shmem.c | 1 +
7 files changed, 20 insertions(+), 16 deletions(-)
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index 59bfc0fc3f45..16e5682b01f1 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -19,6 +19,7 @@
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
+#include <linux/highmem.h>
#include <asm/page.h>
#include <asm/sections.h>
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 61280167c560..b39e624c3291 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -79,8 +79,10 @@ void mem_init(void)
/* this will put all low memory onto the freelists */
totalram_pages = free_all_bootmem();
+#ifdef CONFIG_HIGHMEM
totalhigh_pages = highmem >> PAGE_SHIFT;
totalram_pages += totalhigh_pages;
+#endif
num_physpages = totalram_pages;
max_pfn = totalram_pages;
printk(KERN_INFO "Memory: %luk available\n",
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 42620e723abb..fd7d12daa94f 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -24,11 +24,14 @@ static inline void flush_kernel_dcache_page(struct page *page)
/* declarations for linux/mm/highmem.c */
unsigned int nr_free_highpages(void);
+extern unsigned long totalhigh_pages;
#else /* CONFIG_HIGHMEM */
static inline unsigned int nr_free_highpages(void) { return 0; }
+#define totalhigh_pages 0
+
#ifndef ARCH_HAS_KMAP
static inline void *kmap(struct page *page)
{
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 5e59184c9096..34a6bc3e6cf3 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -162,7 +162,6 @@ extern void swapin_readahead(swp_entry_t, unsigned long, struct vm_area_struct *
/* linux/mm/page_alloc.c */
extern unsigned long totalram_pages;
-extern unsigned long totalhigh_pages;
extern unsigned long totalreserve_pages;
extern long nr_swap_pages;
extern unsigned int nr_free_pages(void);
diff --git a/mm/highmem.c b/mm/highmem.c
index 9b2a5403c447..ee5519b176ee 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -46,6 +46,19 @@ static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
*/
#ifdef CONFIG_HIGHMEM
+unsigned long totalhigh_pages __read_mostly;
+
+unsigned int nr_free_highpages (void)
+{
+ pg_data_t *pgdat;
+ unsigned int pages = 0;
+
+ for_each_online_pgdat(pgdat)
+ pages += pgdat->node_zones[ZONE_HIGHMEM].free_pages;
+
+ return pages;
+}
+
static int pkmap_count[LAST_PKMAP];
static unsigned int last_pkmap_nr;
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(kmap_lock);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e26491cb5a27..5cde54695cfb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -51,7 +51,6 @@ EXPORT_SYMBOL(node_online_map);
nodemask_t node_possible_map __read_mostly = NODE_MASK_ALL;
EXPORT_SYMBOL(node_possible_map);
unsigned long totalram_pages __read_mostly;
-unsigned long totalhigh_pages __read_mostly;
unsigned long totalreserve_pages __read_mostly;
long nr_swap_pages;
int percpu_pagelist_fraction;
@@ -1185,20 +1184,6 @@ unsigned int nr_free_pagecache_pages(void)
{
return nr_free_zone_pages(gfp_zone(GFP_HIGHUSER));
}
-
-#ifdef CONFIG_HIGHMEM
-unsigned int nr_free_highpages (void)
-{
- pg_data_t *pgdat;
- unsigned int pages = 0;
-
- for_each_online_pgdat(pgdat)
- pages += pgdat->node_zones[ZONE_HIGHMEM].free_pages;
-
- return pages;
-}
-#endif
-
#ifdef CONFIG_NUMA
static void show_node(struct zone *zone)
{
diff --git a/mm/shmem.c b/mm/shmem.c
index db21c51531ca..8631be45b40d 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -45,6 +45,7 @@
#include <linux/namei.h>
#include <linux/ctype.h>
#include <linux/migrate.h>
+#include <linux/highmem.h>
#include <asm/uaccess.h>
#include <asm/div64.h>