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-rw-r--r--arch/x86/kernel/process.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c622772744d8..9bfc3f719d47 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -1,6 +1,7 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <asm/idle.h>
#include <linux/smp.h>
#include <linux/slab.h>
#include <linux/sched.h>
@@ -8,6 +9,7 @@
#include <linux/pm.h>
#include <linux/clockchips.h>
#include <asm/system.h>
+#include <asm/apic.h>
unsigned long idle_halt;
EXPORT_SYMBOL(idle_halt);
@@ -122,6 +124,21 @@ void default_idle(void)
EXPORT_SYMBOL(default_idle);
#endif
+void stop_this_cpu(void *dummy)
+{
+ local_irq_disable();
+ /*
+ * Remove this CPU:
+ */
+ cpu_clear(smp_processor_id(), cpu_online_map);
+ disable_local_APIC();
+
+ for (;;) {
+ if (hlt_works(smp_processor_id()))
+ halt();
+ }
+}
+
static void do_nothing(void *unused)
{
}