From: KOSAKI Motohiro <[email protected]> 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 <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Signed-off-by: KOSAKI Motohiro <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
