2 files changed, 99 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
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 44d41e9d7818..719113b652dd 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -2,6 +2,7 @@
 #define _LINUX_TIMER_H
 
 #include <linux/list.h>
+#include <linux/ktime.h>
 #include <linux/spinlock.h>
 #include <linux/stddef.h>
 
@@ -15,6 +16,11 @@ struct timer_list {
         unsigned long data;
 
         struct tvec_t_base_s *base;
+#ifdef CONFIG_TIMER_STATS
+        void *start_site;
+        char start_comm[16];
+        int start_pid;
+#endif
 };
 
 extern struct tvec_t_base_s boot_tvec_bases;
@@ -73,6 +79,54 @@ extern unsigned long next_timer_interrupt(void);
  */
 extern unsigned long get_next_timer_interrupt(unsigned long now);
 
+/*
+ * Timer-statistics info:
+ */
+#ifdef CONFIG_TIMER_STATS
+
+extern void init_timer_stats(void);
+
+extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
+                                     void *timerf, char * comm);
+
+static inline void timer_stats_account_timer(struct timer_list *timer)
+{
+        timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
+                                 timer->function, timer->start_comm);
+}
+
+extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
+                                               void *addr);
+
+static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
+{
+        __timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
+}
+
+static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
+{
+        timer->start_site = NULL;
+}
+#else
+static inline void init_timer_stats(void)
+{
+}
+
+static inline void timer_stats_account_timer(struct timer_list *timer)
+{
+}
+
+static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
+{
+}
+
+static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
+{
+}
+#endif
+
+extern void delayed_work_timer_fn(unsigned long __data);
+
 /**
  * add_timer - start a timer
  * @timer: the timer to be added