Add a flag to indicate deferrable timers in /proc/timer_stats

Add a flag in /proc/timer_stats to indicate deferrable timers.  This will
let developers/users to differentiate between types of tiemrs in
/proc/timer_stats.

Deferrable timer and normal timer will appear in /proc/timer_stats as below.
  10D,     1 swapper          queue_delayed_work_on (delayed_work_timer_fn)
   10,     1 swapper          queue_delayed_work_on (delayed_work_timer_fn)

Also version of timer_stats changes from v0.1 to v0.2

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 7 insertions, 13 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 17c29dca8354..540799bc85f8 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -329,12 +329,13 @@ extern void sysrq_timer_list_show(void);
 #ifdef CONFIG_TIMER_STATS
 
 extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
-                                     void *timerf, char * comm);
+                                     void *timerf, char *comm,
+                                     unsigned int timer_flag);
 
 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);
+                                 timer->function, timer->start_comm, 0);
 }
 
 extern void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer,
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 2b59e6d4219c..78cf899b4409 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -90,16 +90,13 @@ extern unsigned long get_next_timer_interrupt(unsigned long now);
  */
 #ifdef CONFIG_TIMER_STATS
 
+#define TIMER_STATS_FLAG_DEFERRABLE     0x1
+
 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);
-}
+                                     void *timerf, char *comm,
+                                     unsigned int timer_flag);
 
 extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
                                                void *addr);
@@ -118,10 +115,6 @@ 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)
 {
 }