[PATCH 13/16] rcu/nocb: Delete bypass_timer upon nocb_gp wakeup

From: Frederic Weisbecker
Date: Thu Jan 28 2021 - 12:18:59 EST


A NOCB-gp wake up can safely delete the nocb_bypass_timer. nocb_gp_wait()
is going to check again the bypass state and rearm the bypass timer if
necessary.

Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>
Cc: Neeraj Upadhyay <neeraju@xxxxxxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
---
kernel/rcu/tree_plugin.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 39fb792704ed..eb8614577a2c 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1703,6 +1703,7 @@ static bool __wake_nocb_gp(struct rcu_data *rdp_gp,

rdp_gp->nocb_defer_wakeup = RCU_NOCB_WAKE_NOT;
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);
--
2.25.1