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authorNicolas Pitre <nico@cam.org>2008-09-17 15:21:55 -0400
committerNicolas Pitre <nico@cam.org>2009-03-15 21:01:21 -0400
commit3835f6cb645bdb9a58aa6e062fe1d5777f1a9748 (patch)
treede3429794bb06cab351a7909da7c8c33bfa38567
parentd73cd42893f4cdc06e6829fea2347bb92cb789d1 (diff)
[ARM] mem_init(): make highmem pages available for use
Signed-off-by: Nicolas Pitre <nico@marvell.com>
-rw-r--r--arch/arm/mm/init.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 80fd3b69ae1..8277802ec85 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -15,6 +15,7 @@
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
+#include <linux/highmem.h>
#include <asm/mach-types.h>
#include <asm/sections.h>
@@ -485,7 +486,7 @@ void __init mem_init(void)
int i, node;
#ifndef CONFIG_DISCONTIGMEM
- max_mapnr = virt_to_page(high_memory) - mem_map;
+ max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
#endif
/* this will put all unused low memory onto the freelists */
@@ -504,6 +505,19 @@ void __init mem_init(void)
__phys_to_pfn(__pa(swapper_pg_dir)), NULL);
#endif
+#ifdef CONFIG_HIGHMEM
+ /* set highmem page free */
+ for_each_online_node(node) {
+ for_each_nodebank (i, &meminfo, node) {
+ unsigned long start = bank_pfn_start(&meminfo.bank[i]);
+ unsigned long end = bank_pfn_end(&meminfo.bank[i]);
+ if (start >= max_low_pfn + PHYS_PFN_OFFSET)
+ totalhigh_pages += free_area(start, end, NULL);
+ }
+ }
+ totalram_pages += totalhigh_pages;
+#endif
+
/*
* Since our memory may not be contiguous, calculate the
* real number of pages we have in this system
@@ -521,9 +535,10 @@ void __init mem_init(void)
initsize = __init_end - __init_begin;
printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
- "%dK data, %dK init)\n",
+ "%dK data, %dK init, %luK highmem)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
- codesize >> 10, datasize >> 10, initsize >> 10);
+ codesize >> 10, datasize >> 10, initsize >> 10,
+ (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10)));
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
extern int sysctl_overcommit_memory;