Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[mv-sheeva.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index cff9a50e389db8a87b60bca54824dc833cbb1f39..e68bb9e30864e50e764ce2581484f53aef0bfdda 100644 (file)
--- 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>
@@ -9,6 +10,7 @@
 #include <linux/clockchips.h>
 #include <linux/ftrace.h>
 #include <asm/system.h>
+#include <asm/apic.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -127,6 +129,21 @@ 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)
 {
 }