From 028d9b3cc62cb9dd31f1b5929edb3c23612cfccc Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Fri, 8 Dec 2006 15:56:13 +0100
Subject: [PATCH] [S390] Poison init section before freeing it.
The data patterns should allow us to easily tell if somebody accesses
initdata/code after it was freed. Same code as on various other
architectures.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/mm/init.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index aa39591ca130e8..4bb21be3b00709 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -24,6 +24,7 @@
#include <linux/pagemap.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
+#include <linux/poison.h>
#include <asm/processor.h>
#include <asm/system.h>
@@ -187,6 +188,7 @@ void free_initmem(void)
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
+ memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
free_page(addr);
totalram_pages++;
}
--
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