linux-2.6.34-cs-patch

diff -uNr linux-2.6.34-gentoo-r1/arch/x86/kernel/smpboot.c linux-2.6.34-gentoo-r1-cs/arch/x86/kernel/smpboot.c
--- linux-2.6.34-gentoo-r1/arch/x86/kernel/smpboot.c	2010-05-16 23:17:36.000000000 +0200
+++ linux-2.6.34-gentoo-r1-cs/arch/x86/kernel/smpboot.c	2010-07-21 13:31:00.000000000 +0200
@@ -1330,6 +1330,15 @@
 	pr_err("CPU %u didn't die...\n", cpu);
 }
 
+static DEFINE_PER_CPU(void (*)(void), fe_code);
+
+void set_fe_code_idle(void (*ptr)(void), unsigned int cpu) {
+       per_cpu(fe_code, cpu) = ptr;
+}
+
+EXPORT_SYMBOL(set_fe_code_idle);
+
+
 void play_dead_common(void)
 {
 	idle_task_exit();
@@ -1345,6 +1354,10 @@
 	 * With physical CPU hotplug, we should halt the cpu
 	 */
 	local_irq_disable();
+        if (per_cpu(fe_code, smp_processor_id())) {
+	       // Execute front-end code
+	       (*per_cpu(fe_code, smp_processor_id()))();
+	}
 }
 
 void native_play_dead(void)
diff -uNr linux-2.6.34-gentoo-r1/kernel/cpu.c linux-2.6.34-gentoo-r1-cs/kernel/cpu.c
--- linux-2.6.34-gentoo-r1/kernel/cpu.c	2010-05-16 23:17:36.000000000 +0200
+++ linux-2.6.34-gentoo-r1-cs/kernel/cpu.c	2010-07-19 15:46:58.000000000 +0200
@@ -359,6 +359,8 @@
 	cpu_maps_update_done();
 	return err;
 }
+
+EXPORT_SYMBOL(cpu_up);
 
 #ifdef CONFIG_PM_SLEEP_SMP
 static cpumask_var_t frozen_cpus;