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authorThomas Gleixner <tglx@linutronix.de>2019-08-21 21:08:52 +0200
committerThomas Gleixner <tglx@linutronix.de>2019-08-28 11:50:26 +0200
commita34360d42434bbf28c0f375444c52c154ae3e6cf (patch)
tree0e45f45b48c0db9dfbe61d0d06e0c485c6a1718e /kernel/time/itimer.c
parent19298fbf453c90a6cf72288155f80c6f55e9139d (diff)
downloadlinux-a34360d42434bbf28c0f375444c52c154ae3e6cf.tar.bz2
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 <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190821192919.689713638@linutronix.de
Diffstat (limited to 'kernel/time/itimer.c')
-rw-r--r--kernel/time/itimer.c2
1 files changed, 1 insertions, 1 deletions
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