1 files changed, 24 insertions, 0 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index b7480fb5c3dc..254d56de2548 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2212,6 +2212,27 @@ static int sched_balance_self(int cpu, int flag)
 
 #endif /* CONFIG_SMP */
 
+/**
+ * task_oncpu_function_call - call a function on the cpu on which a task runs
+ * @p:          the task to evaluate
+ * @func:       the function to be called
+ * @info:       the function call argument
+ *
+ * Calls the function @func when the task is currently running. This might
+ * be on the current CPU, which just calls the function directly
+ */
+void task_oncpu_function_call(struct task_struct *p,
+                              void (*func) (void *info), void *info)
+{
+        int cpu;
+
+        preempt_disable();
+        cpu = task_cpu(p);
+        if (task_curr(p))
+                smp_call_function_single(cpu, func, info, 1);
+        preempt_enable();
+}
+
 /***
  * try_to_wake_up - wake up a thread
  * @p: the to-be-woken-up thread
@@ -2534,6 +2555,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev,
                     struct task_struct *next)
 {
         fire_sched_out_preempt_notifiers(prev, next);
+        perf_counter_task_sched_out(prev, cpu_of(rq));
         prepare_lock_switch(rq, next);
         prepare_arch_switch(next);
 }
@@ -2574,6 +2596,7 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
          */
         prev_state = prev->state;
         finish_arch_switch(prev);
+        perf_counter_task_sched_in(current, cpu_of(rq));
         finish_lock_switch(rq, prev);
 #ifdef CONFIG_SMP
         if (current->sched_class->post_schedule)
@@ -4296,6 +4319,7 @@ void scheduler_tick(void)
         rq->idle_at_tick = idle_cpu(cpu);
         trigger_load_balance(rq, cpu);
 #endif
+        perf_counter_task_tick(curr, cpu);
 }
 
 #if defined(CONFIG_PREEMPT) && (defined(CONFIG_DEBUG_PREEMPT) || \