--- linux-3.10.16/kernel/profile.c	2013-10-13 16:08:56.000000000 -0700
+++ linux-3.10.16-patched/kernel/profile.c	2013-10-31 13:33:45.913457494 -0700
@@ -37,6 +37,9 @@ struct profile_hit {
 #define NR_PROFILE_HIT		(PAGE_SIZE/sizeof(struct profile_hit))
 #define NR_PROFILE_GRP		(NR_PROFILE_HIT/PROFILE_GRPSZ)
 
+/* Oprofile timer tick hook */
+static int (*timer_hook)(struct pt_regs *) __read_mostly;
+
 static atomic_t *prof_buffer;
 static unsigned long prof_len, prof_shift;
 
@@ -205,6 +208,24 @@ int profile_event_unregister(enum profil
 }
 EXPORT_SYMBOL_GPL(profile_event_unregister);
 
+int register_timer_hook(int (*hook)(struct pt_regs *))
+{
+        if (timer_hook)
+                    return -EBUSY;
+            timer_hook = hook;
+                return 0;
+}
+EXPORT_SYMBOL_GPL(register_timer_hook);
+
+void unregister_timer_hook(int (*hook)(struct pt_regs *))
+{
+        WARN_ON(hook != timer_hook);
+            timer_hook = NULL;
+                /* make sure all CPUs see the NULL hook */
+                synchronize_sched();  /* Allow ongoing interrupts to complete. */
+}
+EXPORT_SYMBOL_GPL(unregister_timer_hook);
+
 #ifdef CONFIG_SMP
 /*
  * Each cpu has a pair of open-addressed hashtables for pending
@@ -414,6 +435,9 @@ void profile_tick(int type)
 {
 	struct pt_regs *regs = get_irq_regs();
 
+        if (type == CPU_PROFILING && timer_hook)
+                    timer_hook(regs);
+
 	if (!user_mode(regs) && prof_cpu_mask != NULL &&
 	    cpumask_test_cpu(smp_processor_id(), prof_cpu_mask))
 		profile_hit(type, (void *)profile_pc(regs));
--- linux-3.10.16/include/linux/profile.h	2013-10-13 16:08:56.000000000 -0700
+++ linux-3.10.16-patched/include/linux/profile.h	2013-10-31 12:39:44.558759374 -0700
@@ -82,6 +82,9 @@ int task_handoff_unregister(struct notif
 int profile_event_register(enum profile_type, struct notifier_block * n);
 int profile_event_unregister(enum profile_type, struct notifier_block * n);
 
+int register_timer_hook(int (*hook)(struct pt_regs *));
+void unregister_timer_hook(int (*hook)(struct pt_regs *));
+
 struct pt_regs;
 
 #else
@@ -132,6 +135,16 @@ static inline int profile_event_unregist
 #define profile_handoff_task(a) (0)
 #define profile_munmap(a) do { } while (0)
 
+static inline int register_timer_hook(int (*hook)(struct pt_regs *))
+{
+        return -ENOSYS;
+}
+
+static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
+{
+        return;
+}
+
 #endif /* CONFIG_PROFILING */
 
 #endif /* _LINUX_PROFILE_H */