Messages in this thread Patch in this message | | | Date | Fri, 8 Dec 2006 16:22:01 +0100 | From | Martin Schwidefsky <> | Subject | [S390] Poison init section before freeing it. |
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From: Heiko Carstens <heiko.carstens@de.ibm.com>
[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 files changed, 2 insertions(+)
diff -urpN linux-2.6/arch/s390/mm/init.c linux-2.6-patched/arch/s390/mm/init.c --- linux-2.6/arch/s390/mm/init.c 2006-12-08 15:53:05.000000000 +0100 +++ linux-2.6-patched/arch/s390/mm/init.c 2006-12-08 15:53:05.000000000 +0100 @@ -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++; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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