Commit-ID: a458360af63a36424c9f607015f0858aacb84a19
Gitweb: https://git.kernel.org/tip/a458360af63a36424c9f607015f0858aacb84a19
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Thu, 19 Apr 2018 15:59:55 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 15 May 2018 10:31:04 -0700
rcu: Drop early GP request check from rcu_gp_kthread()
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>
Tested-by: Nicholas Piggin <npiggin@xxxxxxxxx>
---
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 (;;) {
--
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