[ACPI] SMP poweroff (David Shaohua Li)

http://bugzilla.kernel.org/show_bug.cgi?id=1141

drivers/acpi/sleep/poweroff.c

@@ -8,11 +8,14 @@
 #include <linux/pm.h>
 #include <linux/init.h>
 #include <acpi/acpi_bus.h>
+#include <linux/sched.h>
 
 static void
 acpi_power_off (void)
 {
 	printk("%s called\n",__FUNCTION__);
+	/* Some SMP machines only can poweroff in boot CPU */
+	set_cpus_allowed(current, cpumask_of_cpu(0));
 	acpi_enter_sleep_state_prep(ACPI_STATE_S5);
 	ACPI_DISABLE_IRQS();
 	acpi_enter_sleep_state(ACPI_STATE_S5);