Merge branches 'pm-core', 'pm-qos', 'pm-domains' and 'pm-opp'

[linux.git] / kernel / sched / stats.h

diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
index 9788478a66d4cc70525eb0d5d57a5cc818ec93e1..bf0da0aa0a14432e4c82a8a9aeda513301fd9de7 100644 (file)
--- a/kernel/sched/stats.h
+++ b/kernel/sched/stats.h
@@ -172,18 +172,19 @@ sched_info_switch(struct rq *rq,
  */
 
 /**
- * cputimer_running - return true if cputimer is running
+ * get_running_cputimer - return &tsk->signal->cputimer if cputimer is running
  *
  * @tsk:       Pointer to target task.
  */
-static inline bool cputimer_running(struct task_struct *tsk)
-
+#ifdef CONFIG_POSIX_TIMERS
+static inline
+struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
 {
        struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
 
        /* Check if cputimer isn't running. This is accessed without locking. */
        if (!READ_ONCE(cputimer->running))
-               return false;
+               return NULL;
 
        /*
         * After we flush the task's sum_exec_runtime to sig->sum_sched_runtime
@@ -200,10 +201,17 @@ static inline bool cputimer_running(struct task_struct *tsk)
         * clock delta is behind the expiring timer value.
         */
        if (unlikely(!tsk->sighand))
-               return false;
+               return NULL;
 
-       return true;
+       return cputimer;
+}
+#else
+static inline
+struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
+{
+       return NULL;
 }
+#endif
 
 /**
  * account_group_user_time - Maintain utime for a thread group.
@@ -218,9 +226,9 @@ static inline bool cputimer_running(struct task_struct *tsk)
 static inline void account_group_user_time(struct task_struct *tsk,
                                           u64 cputime)
 {
-       struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
+       struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
 
-       if (!cputimer_running(tsk))
+       if (!cputimer)
                return;
 
        atomic64_add(cputime, &cputimer->cputime_atomic.utime);
@@ -239,9 +247,9 @@ static inline void account_group_user_time(struct task_struct *tsk,
 static inline void account_group_system_time(struct task_struct *tsk,
                                             u64 cputime)
 {
-       struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
+       struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
 
-       if (!cputimer_running(tsk))
+       if (!cputimer)
                return;
 
        atomic64_add(cputime, &cputimer->cputime_atomic.stime);
@@ -260,9 +268,9 @@ static inline void account_group_system_time(struct task_struct *tsk,
 static inline void account_group_exec_runtime(struct task_struct *tsk,
                                              unsigned long long ns)
 {
-       struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
+       struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
 
-       if (!cputimer_running(tsk))
+       if (!cputimer)
                return;
 
        atomic64_add(ns, &cputimer->cputime_atomic.sum_exec_runtime);