Unconfuse a bit the name of this function which suggests returning true
when the state is updated. It actually returns true when the rdp is in
the process of deoffloading and we must ignore it.
Reported-by: Paul E. McKenney <paulmck@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>
Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
---
kernel/rcu/tree_plugin.h | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 53ff99a18ab1..86c3bcceede6 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2026,7 +2026,8 @@ static inline bool nocb_gp_enabled_cb(struct rcu_data *rdp)
return rcu_segcblist_test_flags(&rdp->cblist, flags);
}
-static inline bool nocb_gp_update_state(struct rcu_data *rdp, bool *needwake_state)
+static inline bool nocb_gp_update_state_deoffloading(struct rcu_data *rdp,
+ bool *needwake_state)
{
struct rcu_segcblist *cblist = &rdp->cblist;
@@ -2036,7 +2037,7 @@ static inline bool nocb_gp_update_state(struct rcu_data *rdp, bool *needwake_sta
if (rcu_segcblist_test_flags(cblist, SEGCBLIST_KTHREAD_CB))
*needwake_state = true;
}
- return true;
+ return false;
}
/*
@@ -2047,7 +2048,7 @@ static inline bool nocb_gp_update_state(struct rcu_data *rdp, bool *needwake_sta
rcu_segcblist_clear_flags(cblist, SEGCBLIST_KTHREAD_GP);
if (!rcu_segcblist_test_flags(cblist, SEGCBLIST_KTHREAD_CB))
*needwake_state = true;
- return false;
+ return true;
}
@@ -2085,7 +2086,7 @@ static void nocb_gp_wait(struct rcu_data *my_rdp)
continue;
trace_rcu_nocb_wake(rcu_state.name, rdp->cpu, TPS("Check"));
rcu_nocb_lock_irqsave(rdp, flags);
- if (!nocb_gp_update_state(rdp, &needwake_state)) {
+ if (nocb_gp_update_state_deoffloading(rdp, &needwake_state)) {
rcu_nocb_unlock_irqrestore(rdp, flags);
if (needwake_state)
swake_up_one(&rdp->nocb_state_wq);
--
2.25.1
