From a34360d42434bbf28c0f375444c52c154ae3e6cf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 21 Aug 2019 21:08:52 +0200 Subject: itimers: Use quick sample function get_itimer() locks sighand lock and checks whether the timer is already expired. If it is not expired then the thread group cputime accounting is already enabled. Use the sampling function not the one which is meant for starting a timer. Signed-off-by: Thomas Gleixner Reviewed-by: Frederic Weisbecker Link: https://lkml.kernel.org/r/20190821192919.689713638@linutronix.de --- kernel/time/itimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/time/itimer.c') diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c index 9d26fd4ba4c0..ae04bc259240 100644 --- a/kernel/time/itimer.c +++ b/kernel/time/itimer.c @@ -58,7 +58,7 @@ static void get_cpu_itimer(struct task_struct *tsk, unsigned int clock_id, struct task_cputime cputime; u64 t; - thread_group_cputimer(tsk, &cputime); + thread_group_sample_cputime(tsk, &cputime); if (clock_id == CPUCLOCK_PROF) t = cputime.utime + cputime.stime; else -- cgit