commit 78becc27097585c6aec7043834cadde950ae79f2
author Frederic Weisbecker <fweisbec@gmail.com> Fri Apr 12 01:51:02 2013 +0200
committer Ingo Molnar <mingo@kernel.org> Tue May 28 09:40:27 2013 +0200
tree 3e8f0982faa2a456c1c68fa5e5a4c7c815194ae4
parent 1a55af2e45cce0ff13bc33c8ee99da84e188b615

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>

kernel/sched/rt.c

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 8853ab1..8d85f9a 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -886,7 +886,7 @@
 	if (curr->sched_class != &rt_sched_class)
 		return;
 
-	delta_exec = rq->clock_task - curr->se.exec_start;
+	delta_exec = rq_clock_task(rq) - curr->se.exec_start;
 	if (unlikely((s64)delta_exec <= 0))
 		return;
 
@@ -896,7 +896,7 @@
 	curr->se.sum_exec_runtime += delta_exec;
 	account_group_exec_runtime(curr, delta_exec);
 
-	curr->se.exec_start = rq->clock_task;
+	curr->se.exec_start = rq_clock_task(rq);
 	cpuacct_charge(curr, delta_exec);
 
 	sched_rt_avg_update(rq, delta_exec);
@@ -1345,7 +1345,7 @@
 	} while (rt_rq);
 
 	p = rt_task_of(rt_se);
-	p->se.exec_start = rq->clock_task;
+	p->se.exec_start = rq_clock_task(rq);
 
 	return p;
 }
@@ -1997,7 +1997,7 @@
 {
 	struct task_struct *p = rq->curr;
 
-	p->se.exec_start = rq->clock_task;
+	p->se.exec_start = rq_clock_task(rq);
 
 	/* The running task is never eligible for pushing */
 	dequeue_pushable_task(rq, p);