diff options
authorH. Peter Anvin <hpa@zytor.com>2011-02-06 21:16:09 -0800
committerIngo Molnar <mingo@elte.hu>2011-02-07 09:07:13 +0100
commitd344e38b2c151ca5e5e39f562017127e93912528 (patch)
parent8dbdea8444d303a772bceb1ba963f0e3273bfc5e (diff)
x86, nx: Mark the ACPI resume trampoline code as +x
We reserve lowmem for the things that need it, like the ACPI wakeup code, way early to guarantee availability. This happens before we set up the proper pagetables, so set_memory_x() has no effect. Until we have a better solution, use an initcall to mark the wakeup code executable. Originally-by: Matthieu Castet <castet.matthieu@free.fr> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Matthias Hopf <mhopf@suse.de> Cc: rjw@sisk.pl Cc: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <4D4F8019.2090104@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 4d9ebbab2230..68d1537b8c81 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -12,10 +12,8 @@
#include <linux/cpumask.h>
#include <asm/segment.h>
#include <asm/desc.h>
-#ifdef CONFIG_X86_32
#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
#include "realmode/wakeup.h"
#include "sleep.h"
@@ -149,6 +147,15 @@ void __init acpi_reserve_wakeup_memory(void)
memblock_x86_reserve_range(mem, mem + WAKEUP_SIZE, "ACPI WAKEUP");
+int __init acpi_configure_wakeup_memory(void)
+ if (acpi_realmode)
+ set_memory_x(acpi_realmode, WAKEUP_SIZE >> PAGE_SHIFT);
+ return 0;
static int __init acpi_sleep_setup(char *str)