rcu: Remove waitqueue usage for cpu, node, and boost kthreads

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / rcutree_plugin.h

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index ed339702481dfc3a7746a10a38cc3309fa82e238..049f2787a9840cf0c944aeda59afeffbee6f57a5 100644 (file)
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1196,8 +1196,7 @@ static int rcu_boost_kthread(void *arg)
 
        for (;;) {
                rnp->boost_kthread_status = RCU_KTHREAD_WAITING;
-               wait_event_interruptible(rnp->boost_wq, rnp->boost_tasks ||
-                                                       rnp->exp_tasks);
+               rcu_wait(rnp->boost_tasks || rnp->exp_tasks);
                rnp->boost_kthread_status = RCU_KTHREAD_RUNNING;
                more2boost = rcu_boost(rnp);
                if (more2boost)
@@ -1274,14 +1273,6 @@ static void rcu_preempt_boost_start_gp(struct rcu_node *rnp)
        rnp->boost_time = jiffies + RCU_BOOST_DELAY_JIFFIES;
 }
 
-/*
- * Initialize the RCU-boost waitqueue.
- */
-static void __init rcu_init_boost_waitqueue(struct rcu_node *rnp)
-{
-       init_waitqueue_head(&rnp->boost_wq);
-}
-
 /*
  * Create an RCU-boost kthread for the specified node if one does not
  * already exist.  We only create this kthread for preemptible RCU.
@@ -1306,7 +1297,6 @@ static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
        raw_spin_lock_irqsave(&rnp->lock, flags);
        rnp->boost_kthread_task = t;
        raw_spin_unlock_irqrestore(&rnp->lock, flags);
-       wake_up_process(t);
        sp.sched_priority = RCU_KTHREAD_PRIO;
        sched_setscheduler_nocheck(t, SCHED_FIFO, &sp);
        return 0;
@@ -1328,10 +1318,6 @@ static void rcu_preempt_boost_start_gp(struct rcu_node *rnp)
 {
 }
 
-static void __init rcu_init_boost_waitqueue(struct rcu_node *rnp)
-{
-}
-
 static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
                                                 struct rcu_node *rnp,
                                                 int rnp_index)