linux-kernel - [PATCH tip/core/rcu 27/52] rcu: Remove rsp parameter from rcu_check_gp_start

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Date:   Wed, 29 Aug 2018 15:38:29 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 27/52] rcu: Remove rsp parameter from rcu_check_gp_start_stall()

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
rcu_check_gp_start_stall().

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 kernel/rcu/tree.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4e6bb2bb0874..b77e41cbf07c 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2685,13 +2685,13 @@ static void force_quiescent_state(void)
  * RCU to come out of its idle mode.
  */
 static void
-rcu_check_gp_start_stall(struct rcu_state *rsp, struct rcu_node *rnp,
-			 struct rcu_data *rdp)
+rcu_check_gp_start_stall(struct rcu_node *rnp, struct rcu_data *rdp)
 {
 	const unsigned long gpssdelay = rcu_jiffies_till_stall_check() * HZ;
 	unsigned long flags;
 	unsigned long j;
 	struct rcu_node *rnp_root = rcu_get_root();
+	struct rcu_state *rsp = &rcu_state;
 	static atomic_t warned = ATOMIC_INIT(0);
 
 	if (!IS_ENABLED(CONFIG_PROVE_RCU) || rcu_gp_in_progress() ||
@@ -2771,7 +2771,7 @@ __rcu_process_callbacks(struct rcu_state *rsp)
 		local_irq_restore(flags);
 	}
 
-	rcu_check_gp_start_stall(rsp, rnp, rdp);
+	rcu_check_gp_start_stall(rnp, rdp);
 
 	/* If there are callbacks ready, invoke them. */
 	if (rcu_segcblist_ready_cbs(&rdp->cblist))
-- 
2.17.1