1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/tick.h b/include/linux/tick.h
index 0343eed40619..b232ccc0ee29 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -42,6 +42,7 @@ enum tick_nohz_mode {
  * @idle_waketime:      Time when the idle was interrupted
  * @idle_exittime:      Time when the idle state was left
  * @idle_sleeptime:     Sum of the time slept in idle with sched tick stopped
+ * @iowait_sleeptime:   Sum of the time slept in idle with sched tick stopped, with IO outstanding
  * @sleep_length:       Duration of the current idle sleep
  * @do_timer_lst:       CPU was the last one doing do_timer before going idle
  */
@@ -60,6 +61,7 @@ struct tick_sched {
         ktime_t                         idle_waketime;
         ktime_t                         idle_exittime;
         ktime_t                         idle_sleeptime;
+        ktime_t                         iowait_sleeptime;
         ktime_t                         sleep_length;
         unsigned long                   last_jiffies;
         unsigned long                   next_jiffies;
@@ -123,6 +125,7 @@ extern void tick_nohz_stop_sched_tick(int inidle);
 extern void tick_nohz_restart_sched_tick(void);
 extern ktime_t tick_nohz_get_sleep_length(void);
 extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
+extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
 # else
 static inline void tick_nohz_stop_sched_tick(int inidle) { }
 static inline void tick_nohz_restart_sched_tick(void) { }
@@ -133,6 +136,7 @@ static inline ktime_t tick_nohz_get_sleep_length(void)
         return len;
 }
 static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; }
+static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; }
 # endif /* !NO_HZ */
 
 #endif