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sparc32: add init memory poisoning

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This patch adds init memory poisoning.  It looks like
totalram_pages was not updated properly in free_initrd_mem
so I fixed that as well.

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Robert Reif 2008-09-03 16:29:42 -07:00 committed by David S. Miller
parent 94d5b5432b
commit 1aa0365f27
1 changed files with 11 additions and 3 deletions
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14
arch/sparc/mm/init.c
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@ -23,6 +23,7 @@
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/pagemap.h>
#include <linux/poison.h>
#include <asm/system.h>
#include <asm/vac-ops.h>
@ -480,6 +481,7 @@ void free_initmem (void)
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
struct page *p;
memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
p = virt_to_page(addr);
ClearPageReserved(p);
@ -488,20 +490,26 @@ void free_initmem (void)
totalram_pages++;
num_physpages++;
}
printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", (&__init_end - &__init_begin) >> 10);
printk(KERN_INFO "Freeing unused kernel memory: %dk freed\n",
(&__init_end - &__init_begin) >> 10);
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (start < end)
printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
(end - start) >> 10);
for (; start < end; start += PAGE_SIZE) {
struct page *p = virt_to_page(start);
struct page *p;
memset((void *)start, POISON_FREE_INITMEM, PAGE_SIZE);
p = virt_to_page(start);
ClearPageReserved(p);
init_page_count(p);
__free_page(p);
totalram_pages++;
num_physpages++;
}
}