[PATCH] Drop free_pages()
nr_free_pages is now a simple access to a global variable. Make it a macro
instead of a function.
The nr_free_pages now requires vmstat.h to be included. There is one
occurrence in power management where we need to add the include. Directly
refrer to global_page_state() there to clarify why the #include was added.
[akpm@osdl.org: arm build fix]
[akpm@osdl.org: sparc64 build fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 054822a..09d434f 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -416,7 +416,7 @@
printk("Free swap: %6ldkB\n",
nr_swap_pages << (PAGE_SHIFT-10));
printk("%ld pages of RAM\n", num_physpages);
- printk("%d free pages\n", nr_free_pages());
+ printk("%lu free pages\n", nr_free_pages());
}
void mmu_info(struct seq_file *m)
@@ -1593,7 +1593,7 @@
initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin));
initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT;
- printk("Memory: %uk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n",
+ printk("Memory: %luk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n",
nr_free_pages() << (PAGE_SHIFT-10),
codepages << (PAGE_SHIFT-10),
datapages << (PAGE_SHIFT-10),
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 5423559..817e1b4 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -170,11 +170,14 @@
extern unsigned long totalram_pages;
extern unsigned long totalreserve_pages;
extern long nr_swap_pages;
-extern unsigned int nr_free_pages(void);
extern unsigned int nr_free_pages_pgdat(pg_data_t *pgdat);
extern unsigned int nr_free_buffer_pages(void);
extern unsigned int nr_free_pagecache_pages(void);
+/* Definition of global_page_state not available yet */
+#define nr_free_pages() global_page_state(NR_FREE_PAGES)
+
+
/* linux/mm/swap.c */
extern void FASTCALL(lru_cache_add(struct page *));
extern void FASTCALL(lru_cache_add_active(struct page *));
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index c8d55bc..77caf91 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -3,6 +3,7 @@
#include <linux/types.h>
#include <linux/percpu.h>
+#include <linux/mm.h>
#include <linux/mmzone.h>
#include <asm/atomic.h>
diff --git a/kernel/power/main.c b/kernel/power/main.c
index ff3a618..47ca5a2 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -20,6 +20,7 @@
#include <linux/cpu.h>
#include <linux/resume-trace.h>
#include <linux/freezer.h>
+#include <linux/vmstat.h>
#include "power.h"
@@ -72,7 +73,8 @@
goto Thaw;
}
- if ((free_pages = nr_free_pages()) < FREE_PAGE_NUMBER) {
+ if ((free_pages = global_page_state(NR_FREE_PAGES))
+ < FREE_PAGE_NUMBER) {
pr_debug("PM: free some memory\n");
shrink_all_memory(FREE_PAGE_NUMBER - free_pages);
if (nr_free_pages() < FREE_PAGE_NUMBER) {
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ba62d87..f1e320b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1440,16 +1440,6 @@
EXPORT_SYMBOL(free_pages);
-/*
- * Total amount of free (allocatable) RAM:
- */
-unsigned int nr_free_pages(void)
-{
- return global_page_state(NR_FREE_PAGES);
-}
-
-EXPORT_SYMBOL(nr_free_pages);
-
#ifdef CONFIG_NUMA
unsigned int nr_free_pages_pgdat(pg_data_t *pgdat)
{
