perf-move-irq-work-to-softirq-in-rt.patch

Subject: x86-no-perf-irq-work-rt.patch
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 13 Jul 2011 14:05:05 +0200

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/kernel/irq_work.c |    2 ++
 kernel/irq_work.c          |    2 ++
 kernel/timer.c             |    6 +++++-
 3 files changed, 9 insertions(+), 1 deletion(-)

Index: linux-stable/arch/x86/kernel/irq_work.c
===================================================================
--- linux-stable.orig/arch/x86/kernel/irq_work.c
+++ linux-stable/arch/x86/kernel/irq_work.c
@@ -18,6 +18,7 @@ void smp_irq_work_interrupt(struct pt_re
 	irq_exit();
 }
 
+#ifndef CONFIG_PREEMPT_RT_FULL
 void arch_irq_work_raise(void)
 {
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -28,3 +29,4 @@ void arch_irq_work_raise(void)
 	apic_wait_icr_idle();
 #endif
 }
+#endif
Index: linux-stable/kernel/irq_work.c
===================================================================
--- linux-stable.orig/kernel/irq_work.c
+++ linux-stable/kernel/irq_work.c
@@ -107,8 +107,10 @@ void irq_work_run(void)
 	if (llist_empty(this_list))
 		return;
 
+#ifndef CONFIG_PREEMPT_RT_FULL
 	BUG_ON(!in_irq());
 	BUG_ON(!irqs_disabled());
+#endif
 
 	llnode = llist_del_all(this_list);
 	while (llnode != NULL) {
Index: linux-stable/kernel/timer.c
===================================================================
--- linux-stable.orig/kernel/timer.c
+++ linux-stable/kernel/timer.c
@@ -1432,7 +1432,7 @@ void update_process_times(int user_tick)
 	scheduler_tick();
 	run_local_timers();
 	rcu_check_callbacks(cpu, user_tick);
-#ifdef CONFIG_IRQ_WORK
+#if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL)
 	if (in_irq())
 		irq_work_run();
 #endif
@@ -1446,6 +1446,10 @@ static void run_timer_softirq(struct sof
 {
 	struct tvec_base *base = __this_cpu_read(tvec_bases);
 
+#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL)
+	irq_work_run();
+#endif
+
 	printk_tick();
 	hrtimer_run_pending();