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Subject[RFC 13/60] sched: Remove useless checks for root task-group
Date
The functions sync_throttle() and unregister_fair_sched_group() are
called during the creation and destruction of cgroups. They are never
called for the root task-group. Remove checks that always yield the
same result when operating on non-root task groups.

Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
---
kernel/sched/fair.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5d6225aedbfe..5cad364e3a88 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4716,9 +4716,6 @@ static void sync_throttle(struct task_group *tg, int cpu)
if (!cfs_bandwidth_used())
return;

- if (!tg->parent)
- return;
-
cfs_rq = tg->cfs_rq[cpu];
pcfs_rq = tg->parent->cfs_rq[cpu];

@@ -9881,8 +9878,7 @@ void unregister_fair_sched_group(struct task_group *tg)
int cpu;

for_each_possible_cpu(cpu) {
- if (tg->cfs_rq[cpu]->my_se)
- remove_entity_load_avg(tg->cfs_rq[cpu]->my_se);
+ remove_entity_load_avg(tg->cfs_rq[cpu]->my_se);

/*
* Only empty task groups can be destroyed; so we can speculatively
--
2.9.3.1.gcba166c.dirty
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