ath9k: Disable PowerSave by default

[firefly-linux-kernel-4.4.55.git] / kernel / posix-cpu-timers.c

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 0bc33561a4355b1cb1d90efd6a07fbe177735a1f..42670e9b44e0830f92c4238236906904dd505b51 100644 (file)
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -155,6 +155,21 @@ static void bump_cpu_timer(struct k_itimer *timer,
        }
 }
 
+/**
+ * task_cputime_zero - Check a task_cputime struct for all zero fields.
+ *
+ * @cputime:   The struct to compare.
+ *
+ * Checks @cputime to see if all fields are zero.  Returns true if all fields
+ * are zero, false if any field is nonzero.
+ */
+static inline int task_cputime_zero(const struct task_cputime *cputime)
+{
+       if (!cputime->utime && !cputime->stime && !cputime->sum_exec_runtime)
+               return 1;
+       return 0;
+}
+
 static inline cputime_t prof_ticks(struct task_struct *p)
 {
        cputime_t utime, stime;
@@ -654,6 +669,17 @@ static void posix_cpu_timer_kick_nohz(void)
 {
        schedule_work(&nohz_kick_work);
 }
+
+bool posix_cpu_timers_can_stop_tick(struct task_struct *tsk)
+{
+       if (!task_cputime_zero(&tsk->cputime_expires))
+               return false;
+
+       if (tsk->signal->cputimer.running)
+               return false;
+
+       return true;
+}
 #else
 static inline void posix_cpu_timer_kick_nohz(void) { }
 #endif
@@ -1032,21 +1058,6 @@ static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,
        }
 }
 
-/**
- * task_cputime_zero - Check a task_cputime struct for all zero fields.
- *
- * @cputime:   The struct to compare.
- *
- * Checks @cputime to see if all fields are zero.  Returns true if all fields
- * are zero, false if any field is nonzero.
- */
-static inline int task_cputime_zero(const struct task_cputime *cputime)
-{
-       if (!cputime->utime && !cputime->stime && !cputime->sum_exec_runtime)
-               return 1;
-       return 0;
-}
-
 /*
  * Check for any per-thread CPU timers that have fired and move them
  * off the tsk->*_timers list onto the firing list.  Per-thread timers