linux-kernel - [PATCH tip/core/rcu 20/52] rcu: Remove rsp parameter from note_gp

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Message-Id: <20180829223854.4055-20-paulmck@linux.vnet.ibm.com>
Date:   Wed, 29 Aug 2018 15:38:22 -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 20/52] 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@...ux.vnet.ibm.com>
---
 kernel/rcu/tree.c        | 6 +++---
 kernel/rcu/tree_plugin.h | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4dd9d68af702..752cd23860ed 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1800,7 +1800,7 @@ static bool __note_gp_changes(struct rcu_node *rnp, struct rcu_data *rdp)
 	return ret;
 }
 
-static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp)
+static void note_gp_changes(struct rcu_data *rdp)
 {
 	unsigned long flags;
 	bool needwake;
@@ -2374,7 +2374,7 @@ static void
 rcu_check_quiescent_state(struct rcu_state *rsp, struct rcu_data *rdp)
 {
 	/* Check for grace-period ends and beginnings. */
-	note_gp_changes(rsp, rdp);
+	note_gp_changes(rdp);
 
 	/*
 	 * Does this CPU still need to do its part for current grace period?
@@ -2839,7 +2839,7 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp,
 		     rdp->qlen_last_fqs_check + qhimark)) {
 
 		/* Are we ignoring a completed grace period? */
-		note_gp_changes(rsp, rdp);
+		note_gp_changes(rdp);
 
 		/* Start a new grace period if one not already started. */
 		if (!rcu_gp_in_progress()) {
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 0c59c3987c60..82f10a6bf266 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1586,7 +1586,7 @@ static bool __maybe_unused rcu_try_advance_all_cbs(void)
 					  rcu_seq_current(&rnp->gp_seq)) ||
 		     unlikely(READ_ONCE(rdp->gpwrap))) &&
 		    rcu_segcblist_pend_cbs(&rdp->cblist))
-			note_gp_changes(rsp, rdp);
+			note_gp_changes(rdp);
 
 		if (rcu_segcblist_ready_cbs(&rdp->cblist))
 			cbs_ready = true;
-- 
2.17.1