[PATCH tip/core/rcu 20/21] rcu: Drop early GP request check from rcu_gp_kthread()

[Paul E. McKenney]

Now that grace-period requests use funnel locking and now that they
set ->gp_flags to RCU_GP_FLAG_INIT even when the RCU grace-period
kthread has not yet started, rcu_gp_kthread() no longer needs to check
need_any_future_gp() at startup time.  This commit therefore removes
this check.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
 kernel/rcu/tree.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 020a0fe2dbee..ed238886e6ca 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2135,12 +2135,6 @@ static int __noreturn rcu_gp_kthread(void *arg)
 	struct rcu_state *rsp = arg;
 	struct rcu_node *rnp = rcu_get_root(rsp);
 
-	/* Check for early-boot work. */
-	raw_spin_lock_irq_rcu_node(rnp);
-	if (need_any_future_gp(rnp))
-		WRITE_ONCE(rsp->gp_flags, RCU_GP_FLAG_INIT);
-	raw_spin_unlock_irq_rcu_node(rnp);
-
 	rcu_bind_gp_kthread();
 	for (;;) {
 
-- 
2.5.2