*/
void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);
-
+void thread_group_sample_cputime(struct task_struct *tsk, struct task_cputime *times);
/*
* The following are functions that support scheduler-internal time accounting.
times->sum_exec_runtime = atomic64_read(&atomic_times->sum_exec_runtime);
}
+/**
+ * thread_group_sample_cputime - Sample cputime for a given task
+ * @tsk: Task for which cputime needs to be started
+ * @iimes: Storage for time samples
+ *
+ * Called from sys_getitimer() to calculate the expiry time of an active
+ * timer. That means group cputime accounting is already active. Called
+ * with task sighand lock held.
+ *
+ * Updates @times with an uptodate sample of the thread group cputimes.
+ */
+void thread_group_sample_cputime(struct task_struct *tsk,
+ struct task_cputime *times)
+{
+ struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
+
+ WARN_ON_ONCE(!cputimer->running);
+
+ sample_cputime_atomic(times, &cputimer->cputime_atomic);
+}
+
void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times)
{
struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;