From: Frederic Weisbecker <frederic@kernel.org>
Date: Tue, 23 Feb 2021 00:10:08 +0000 (+0100)
Subject: rcu/nocb: Delete bypass_timer upon nocb_gp wakeup
X-Git-Tag: v5.15~802^2^6~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3b2348e2fdf403b25a317b394db605257f321966;p=platform%2Fkernel%2Flinux-starfive.git

rcu/nocb: Delete bypass_timer upon nocb_gp wakeup

A NOCB-gp wake p can safely delete the ->nocb_bypass_timer because
nocb_gp_wait() will recheck again the bypass state and rearm the bypass
timer if necessary.  This commit therefore deletes this timer.

Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index a667551..4253a0e 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1701,6 +1701,8 @@ static bool __wake_nocb_gp(struct rcu_data *rdp_gp,
 		del_timer(&rdp_gp->nocb_timer);
 	}
 
+	del_timer(&rdp_gp->nocb_bypass_timer);
+
 	if (force || READ_ONCE(rdp_gp->nocb_gp_sleep)) {
 		WRITE_ONCE(rdp_gp->nocb_gp_sleep, false);
 		needwake = true;