1 files changed, 45 insertions, 0 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 4ecd991431b4..93b8757c1ea2 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -119,6 +119,11 @@ struct hrtimer {
         enum hrtimer_cb_mode            cb_mode;
         struct list_head                cb_entry;
 #endif
+#ifdef CONFIG_TIMER_STATS
+        void                            *start_site;
+        char                            start_comm[16];
+        int                             start_pid;
+#endif
 };
 
 /**
@@ -311,4 +316,44 @@ extern unsigned long ktime_divns(const ktime_t kt, s64 div);
 # define ktime_divns(kt, div)           (unsigned long)((kt).tv64 / (div))
 #endif
 
+/*
+ * Timer-statistics info:
+ */
+#ifdef CONFIG_TIMER_STATS
+
+extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
+                                     void *timerf, char * comm);
+
+static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
+{
+        timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
+                                 timer->function, timer->start_comm);
+}
+
+extern void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer,
+                                                 void *addr);
+
+static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
+{
+        __timer_stats_hrtimer_set_start_info(timer, __builtin_return_address(0));
+}
+
+static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
+{
+        timer->start_site = NULL;
+}
+#else
+static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
+{
+}
+
+static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
+{
+}
+
+static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
+{
+}
+#endif
+
 #endif