[tip:core/rcu] rcu: Remove rsp parameter from __note_gp_changes()

["tip-bot for Paul E. McKenney" <tipbot@xxxxxxxxx>]

Commit-ID:  c7e48f7ba3820145d08015108ea763bd03c888e9
Gitweb:     https://git.kernel.org/tip/c7e48f7ba3820145d08015108ea763bd03c888e9
Author:     Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 3 Jul 2018 17:22:34 -0700
Committer:  Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 30 Aug 2018 16:03:01 -0700

rcu: Remove rsp parameter from __note_gp_changes()

There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to RCU's
functions.  This commit therefore removes the rsp parameter from
__note_gp_changes().

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
 kernel/rcu/tree.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 6964d04c0823..3e1ec264a653 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1758,11 +1758,11 @@ static bool rcu_advance_cbs(struct rcu_node *rnp, struct rcu_data *rdp)
  * structure corresponding to the current CPU, and must have irqs disabled.
  * Returns true if the grace-period kthread needs to be awakened.
  */
-static bool __note_gp_changes(struct rcu_state *rsp, struct rcu_node *rnp,
-			      struct rcu_data *rdp)
+static bool __note_gp_changes(struct rcu_node *rnp, struct rcu_data *rdp)
 {
 	bool ret;
 	bool need_gp;
+	struct rcu_state __maybe_unused *rsp = &rcu_state;
 
 	raw_lockdep_assert_held_rcu_node(rnp);
 
@@ -1815,7 +1815,7 @@ static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp)
 		local_irq_restore(flags);
 		return;
 	}
-	needwake = __note_gp_changes(rsp, rnp, rdp);
+	needwake = __note_gp_changes(rnp, rdp);
 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
 	if (needwake)
 		rcu_gp_kthread_wake();
@@ -1940,7 +1940,7 @@ static bool rcu_gp_init(struct rcu_state *rsp)
 		rnp->qsmask = rnp->qsmaskinit;
 		WRITE_ONCE(rnp->gp_seq, rsp->gp_seq);
 		if (rnp == rdp->mynode)
-			(void)__note_gp_changes(rsp, rnp, rdp);
+			(void)__note_gp_changes(rnp, rdp);
 		rcu_preempt_boost_start_gp(rnp);
 		trace_rcu_grace_period_init(rsp->name, rnp->gp_seq,
 					    rnp->level, rnp->grplo,
@@ -2051,7 +2051,7 @@ static void rcu_gp_cleanup(struct rcu_state *rsp)
 		WRITE_ONCE(rnp->gp_seq, new_gp_seq);
 		rdp = this_cpu_ptr(&rcu_data);
 		if (rnp == rdp->mynode)
-			needgp = __note_gp_changes(rsp, rnp, rdp) || needgp;
+			needgp = __note_gp_changes(rnp, rdp) || needgp;
 		/* smp_mb() provided by prior unlock-lock pair. */
 		needgp = rcu_future_gp_cleanup(rnp) || needgp;
 		sq = rcu_nocb_gp_get(rnp);