sched: Use an accessor to read the rq clock

Read the runqueue clock through an accessor. This
prepares for adding a debugging infrastructure to
detect missing or redundant calls to update_rq_clock()
between a scheduler's entry and exit point.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Turner <pjt@google.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1365724262-20142-6-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
index 2ef90a51ec5e..17d7065c3872 100644
--- a/kernel/sched/stats.h
+++ b/kernel/sched/stats.h
@@ -61,7 +61,7 @@ static inline void sched_info_reset_dequeued(struct task_struct *t)
  */
 static inline void sched_info_dequeued(struct task_struct *t)
 {
-        unsigned long long now = task_rq(t)->clock, delta = 0;
+        unsigned long long now = rq_clock(task_rq(t)), delta = 0;
 
         if (unlikely(sched_info_on()))
                 if (t->sched_info.last_queued)
@@ -79,7 +79,7 @@ static inline void sched_info_dequeued(struct task_struct *t)
  */
 static void sched_info_arrive(struct task_struct *t)
 {
-        unsigned long long now = task_rq(t)->clock, delta = 0;
+        unsigned long long now = rq_clock(task_rq(t)), delta = 0;
 
         if (t->sched_info.last_queued)
                 delta = now - t->sched_info.last_queued;
@@ -100,7 +100,7 @@ static inline void sched_info_queued(struct task_struct *t)
 {
         if (unlikely(sched_info_on()))
                 if (!t->sched_info.last_queued)
-                        t->sched_info.last_queued = task_rq(t)->clock;
+                        t->sched_info.last_queued = rq_clock(task_rq(t));
 }
 
 /*
@@ -112,7 +112,7 @@ static inline void sched_info_queued(struct task_struct *t)
  */
 static inline void sched_info_depart(struct task_struct *t)
 {
-        unsigned long long delta = task_rq(t)->clock -
+        unsigned long long delta = rq_clock(task_rq(t)) -
                                         t->sched_info.last_arrival;
 
         rq_sched_info_depart(task_rq(t), delta);