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sched: fair: Disable double lock/unlock balance in detach_task()

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CONFIG_LOCK_STAT shows warnings in detach_task() for releasing a
pinned lock. The warnings are due to the calls to
double_unlock_balance() added to snapshot WALT. Lets disable them if
not building with SCHED_WALT.

Bug: 123720375
Bug: 148940637
Change-Id: Ibfa28b1434fa6006fa0117fd2df1a3eadb321568
Signed-off-by: Miguel de Dios <migueldedios@google.com>
Signed-off-by: Jimmy Shiu <jimmyshiu@google.com>
This commit is contained in:
Miguel de Dios 2019-02-07 17:07:24 -08:00 committed by spakkkk
parent 7de89e1d8b
commit 96c3f64cd4
1 changed files with 4 additions and 0 deletions
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4
kernel/sched/fair.c
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@ -8940,6 +8940,7 @@ static void detach_task(struct task_struct *p, struct lb_env *env)
p->on_rq = TASK_ON_RQ_MIGRATING;
deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK);
#ifdef CONFIG_SCHED_WALT
lockdep_off();
double_lock_balance(env->src_rq, env->dst_rq);
if (!(env->src_rq->clock_update_flags & RQCF_UPDATED))
@ -8947,6 +8948,9 @@ static void detach_task(struct task_struct *p, struct lb_env *env)
set_task_cpu(p, env->dst_cpu);
double_unlock_balance(env->src_rq, env->dst_rq);
lockdep_on();
#else
set_task_cpu(p, env->dst_cpu);
#endif
}
/*