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[ARM] mem_init(): make highmem pages available for use

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Signed-off-by: Nicolas Pitre <nico@marvell.com>
This commit is contained in:
Nicolas Pitre 2008-09-17 15:21:55 -04:00
parent d73cd42893
commit 3835f6cb64
1 changed files with 18 additions and 3 deletions
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21
arch/arm/mm/init.c
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@ -15,6 +15,7 @@
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/nodemask.h> #include <linux/nodemask.h>
#include <linux/initrd.h> #include <linux/initrd.h>
#include <linux/highmem.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include <asm/sections.h> #include <asm/sections.h>
@ -485,7 +486,7 @@ void __init mem_init(void)
int i, node; int i, node;
#ifndef CONFIG_DISCONTIGMEM #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 #endif
/* this will put all unused low memory onto the freelists */ /* 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); __phys_to_pfn(__pa(swapper_pg_dir)), NULL);
#endif #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 * Since our memory may not be contiguous, calculate the
* real number of pages we have in this system * real number of pages we have in this system
@ -521,9 +535,10 @@ void __init mem_init(void)
initsize = __init_end - __init_begin; initsize = __init_end - __init_begin;
printk(KERN_NOTICE "Memory: %luKB available (%dK code, " 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), (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) { if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
extern int sysctl_overcommit_memory; extern int sysctl_overcommit_memory;