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>

1 files changed, 3 insertions, 2 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,