From: KOSAKI Motohiro <kosaki.motoh...@jp.fujitsu.com>
A type of tsk->se.sum_exec_runtime is u64. Thus reading it is racy when
running 32bit. We should use task_sched_runtime().
Cc: Olivier Langlois <oliv...@trillion01.com>
CC: Martin Schwidefsky <schwidef...@de.ibm.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motoh...@jp.fujitsu.com>
---
kernel/posix-cpu-timers.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index c69b8d8..4043282 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -958,7 +958,8 @@ static void check_thread_timers(struct task_struct *tsk,
struct cpu_timer_list *t = list_first_entry(timers,
struct cpu_timer_list,
entry);
- if (!--maxfire || tsk->se.sum_exec_runtime < t->expires.sched) {
+ unsigned long long runtime = task_sched_runtime(tsk, false);
+ if (!--maxfire || runtime < t->expires.sched) {
tsk->cputime_expires.sched_exp = t->expires.sched;
break;
}
--
1.7.1
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