diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index b3b1441..5ac241b 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -423,7 +423,7 @@ unsigned long profile_pc(struct pt_regs *regs)
 EXPORT_SYMBOL(profile_pc);
 #endif
 
-#ifdef CONFIG_IRQ_WORK
+#if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL)
 
 /*
  * 64-bit uses a byte in the PACA, 32-bit uses a per-cpu variable...
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 269af58..dbb51a6 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -43,10 +43,12 @@ void __irq_entry deferred_pcr_work_irq(int irq, struct pt_regs *regs)
 	set_irq_regs(old_regs);
 }
 
+#ifndef CONFIG_PREEMPT_RT_FULL
 void arch_irq_work_raise(void)
 {
 	set_softint(1 << PIL_DEFERRED_PCR_WORK);
 }
+#endif
 
 const struct pcr_ops *pcr_ops;
 EXPORT_SYMBOL_GPL(pcr_ops);
diff --git a/include/linux/delay.h b/include/linux/delay.h
index e23a7c0..37caab3 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -53,7 +53,7 @@ static inline void ssleep(unsigned int seconds)
 }
 
 #ifdef CONFIG_PREEMPT_RT_FULL
-# define cpu_chill()	msleep(1)
+extern void cpu_chill(void);
 #else
 # define cpu_chill()	cpu_relax()
 #endif
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h
index 6601702..60c19ee 100644
--- a/include/linux/irq_work.h
+++ b/include/linux/irq_work.h
@@ -16,6 +16,7 @@
 #define IRQ_WORK_BUSY		2UL
 #define IRQ_WORK_FLAGS		3UL
 #define IRQ_WORK_LAZY		4UL /* Doesn't want IPI, wait for tick */
+#define IRQ_WORK_HARD_IRQ	8UL /* Run hard IRQ context, even on RT */
 
 struct irq_work {
 	unsigned long flags;
diff --git a/include/linux/locallock.h b/include/linux/locallock.h
index 32c684b..21653e9 100644
--- a/include/linux/locallock.h
+++ b/include/linux/locallock.h
@@ -36,6 +36,22 @@ struct local_irq_lock {
 			spin_lock_init(&per_cpu(lvar, __cpu).lock);	\
 	} while (0)
 
+/*
+ * spin_lock|trylock|unlock_local flavour that does not migrate disable
+ * used for __local_lock|trylock|unlock where get_local_var/put_local_var
+ * already takes care of the migrate_disable/enable
+ * for CONFIG_PREEMPT_BASE map to the normal spin_* calls.
+ */
+#ifdef CONFIG_PREEMPT_RT_FULL
+# define spin_lock_local(lock)			rt_spin_lock(lock)
+# define spin_trylock_local(lock)		rt_spin_trylock(lock)
+# define spin_unlock_local(lock)		rt_spin_unlock(lock)
+#else
+# define spin_lock_local(lock)			spin_lock(lock)
+# define spin_trylock_local(lock)		spin_trylock(lock)
+# define spin_unlock_local(lock)		spin_unlock(lock)
+#endif
+
 static inline void __local_lock(struct local_irq_lock *lv)
 {
 	if (lv->owner != current) {
diff --git a/include/linux/spinlock_rt.h b/include/linux/spinlock_rt.h
index 4f91114..ac6f08b 100644
--- a/include/linux/spinlock_rt.h
+++ b/include/linux/spinlock_rt.h
@@ -36,10 +36,6 @@ extern int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock);
 extern void __lockfunc __rt_spin_lock(struct rt_mutex *lock);
 extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
 
-#define spin_lock_local(lock)			rt_spin_lock(lock)
-#define spin_trylock_local(lock)		rt_spin_trylock(lock)
-#define spin_unlock_local(lock)			rt_spin_unlock(lock)
-
 #define spin_lock(lock)				\
 	do {					\
 		migrate_disable();		\
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 7aa442e..5c26d2c 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1890,6 +1890,21 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp,
 	return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
 }
 
+#ifdef CONFIG_PREEMPT_RT_FULL
+/*
+ * Sleep for 1 ms in hope whoever holds what we want will let it go.
+ */
+void cpu_chill(void)
+{
+	struct timespec tu = {
+		.tv_nsec = NSEC_PER_MSEC,
+	};
+
+	hrtimer_nanosleep(&tu, NULL, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
+}
+EXPORT_SYMBOL(cpu_chill);
+#endif
+
 /*
  * Functions related to boot-time initialization:
  */
diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index f6e4377..35d21f9 100644
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -20,6 +20,9 @@
 
 
 static DEFINE_PER_CPU(struct llist_head, irq_work_list);
+#ifdef CONFIG_PREEMPT_RT_FULL
+static DEFINE_PER_CPU(struct llist_head, hirq_work_list);
+#endif
 static DEFINE_PER_CPU(int, irq_work_raised);
 
 /*
@@ -48,7 +51,11 @@ static bool irq_work_claim(struct irq_work *work)
 	return true;
 }
 
+#ifdef CONFIG_PREEMPT_RT_FULL
+void arch_irq_work_raise(void)
+#else
 void __weak arch_irq_work_raise(void)
+#endif
 {
 	/*
 	 * Lame architectures will get the timer tick callback
@@ -70,8 +77,12 @@ void irq_work_queue(struct irq_work *work)
 	/* Queue the entry and raise the IPI if needed. */
 	preempt_disable();
 
-	llist_add(&work->llnode, &__get_cpu_var(irq_work_list));
-
+#ifdef CONFIG_PREEMPT_RT_FULL
+	if (work->flags & IRQ_WORK_HARD_IRQ)
+		llist_add(&work->llnode, &__get_cpu_var(hirq_work_list));
+	else
+#endif
+		llist_add(&work->llnode, &__get_cpu_var(irq_work_list));
 	/*
 	 * If the work is not "lazy" or the tick is stopped, raise the irq
 	 * work interrupt (if supported by the arch), otherwise, just wait
@@ -115,7 +126,12 @@ static void __irq_work_run(void)
 	__this_cpu_write(irq_work_raised, 0);
 	barrier();
 
-	this_list = &__get_cpu_var(irq_work_list);
+#ifdef CONFIG_PREEMPT_RT_FULL
+	if (in_irq())
+		this_list = &__get_cpu_var(hirq_work_list);
+	else
+#endif
+		this_list = &__get_cpu_var(irq_work_list);
 	if (llist_empty(this_list))
 		return;
 
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 4675aab..a236875 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -221,6 +221,7 @@ static void nohz_full_kick_work_func(struct irq_work *work)
 
 static DEFINE_PER_CPU(struct irq_work, nohz_full_kick_work) = {
 	.func = nohz_full_kick_work_func,
+	.flags = IRQ_WORK_HARD_IRQ,
 };
 
 /*
diff --git a/kernel/timer.c b/kernel/timer.c
index 426d114..cc34e42 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1425,7 +1425,7 @@ void update_process_times(int user_tick)
 	scheduler_tick();
 	run_local_timers();
 	rcu_check_callbacks(cpu, user_tick);
-#if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL)
+#if defined(CONFIG_IRQ_WORK)
 	if (in_irq())
 		irq_work_run();
 #endif
diff --git a/localversion-rt b/localversion-rt
index 08b3e75..18777ec 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt14
+-rt15