1 files changed, 37 insertions, 5 deletions

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index a4a9cc88bec7..401e38be1f78 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -28,7 +28,9 @@
 #include <linux/tick.h>
 #include <linux/utsname.h>
 #include <linux/uaccess.h>
+#include <linux/random.h>
 
+#include <asm/cacheflush.h>
 #include <asm/leds.h>
 #include <asm/processor.h>
 #include <asm/system.h>
@@ -36,6 +38,12 @@
 #include <asm/stacktrace.h>
 #include <asm/mach/time.h>
 
+#ifdef CONFIG_CC_STACKPROTECTOR
+#include <linux/stackprotector.h>
+unsigned long __stack_chk_guard __read_mostly;
+EXPORT_SYMBOL(__stack_chk_guard);
+#endif
+
 static const char *processor_modes[] = {
   "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
   "UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
@@ -84,10 +92,9 @@ __setup("hlt", hlt_setup);
 
 void arm_machine_restart(char mode, const char *cmd)
 {
-	/*
-	 * Clean and disable cache, and turn off interrupts
-	 */
-	cpu_proc_fin();
+	/* Disable interrupts first */
+	local_irq_disable();
+	local_fiq_disable();
 
 	/*
 	 * Tell the mm system that we are going to reboot -
@@ -96,6 +103,15 @@ void arm_machine_restart(char mode, const char *cmd)
 	 */
 	setup_mm_for_reboot(mode);
 
+	/* Clean and invalidate caches */
+	flush_cache_all();
+
+	/* Turn off caching */
+	cpu_proc_fin();
+
+	/* Push out any further dirty data, and ensure cache is empty */
+	flush_cache_all();
+
 	/*
 	 * Now call the architecture specific reboot code.
 	 */
@@ -189,19 +205,29 @@ int __init reboot_setup(char *str)
 
 __setup("reboot=", reboot_setup);
 
-void machine_halt(void)
+void machine_shutdown(void)
 {
+#ifdef CONFIG_SMP
+	smp_send_stop();
+#endif
 }
 
+void machine_halt(void)
+{
+	machine_shutdown();
+	while (1);
+}
 
 void machine_power_off(void)
 {
+	machine_shutdown();
 	if (pm_power_off)
 		pm_power_off();
 }
 
 void machine_restart(char *cmd)
 {
+	machine_shutdown();
 	arm_pm_restart(reboot_mode, cmd);
 }
 
@@ -426,3 +452,9 @@ unsigned long get_wchan(struct task_struct *p)
 	} while (count ++ < 16);
 	return 0;
 }
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+	unsigned long range_end = mm->brk + 0x02000000;
+	return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}