[PATCH v2 3/5] cgroup: Fix 'usage_usec' time in root's cpu.stat

[Andrey Ryabinin]

Global CPUTIME_USER counter already includes CPUTIME_GUEST
Also CPUTIME_NICE already includes CPUTIME_GUEST_NICE.

Remove additions of CPUTIME_GUEST[_NICE] to total ->sum_exec_runtime
to not account them twice.

Fixes: 936f2a70f207 ("cgroup: add cpu.stat file to root cgroup")
Signed-off-by: Andrey Ryabinin <arbn@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Tested-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
---
 Changes since v1:
  - Add review/tested tags in changelog
---
 kernel/cgroup/rstat.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
index b264ab5652ba..1486768f2318 100644
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -433,8 +433,6 @@ static void root_cgroup_cputime(struct task_cputime *cputime)
 		cputime->sum_exec_runtime += user;
 		cputime->sum_exec_runtime += sys;
 		cputime->sum_exec_runtime += cpustat[CPUTIME_STEAL];
-		cputime->sum_exec_runtime += cpustat[CPUTIME_GUEST];
-		cputime->sum_exec_runtime += cpustat[CPUTIME_GUEST_NICE];
 	}
 }
 
-- 
2.31.1