[tip: core/rcu] rcu/nocb: Rename nocb_gp_update_state to nocb_gp_update_state_deoffloading

[tip-bot2 for Frederic Weisbecker]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     55adc3e1c82a25e99e9efef4f2b14b8b4806918a
Gitweb:        https://git.kernel.org/tip/55adc3e1c82a25e99e9efef4f2b14b8b4806918a
Author:        Frederic Weisbecker <frederic@xxxxxxxxxx>
AuthorDate:    Thu, 28 Jan 2021 18:12:13 +01:00
Committer:     Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Mon, 08 Mar 2021 14:20:22 -08:00

rcu/nocb: Rename nocb_gp_update_state to nocb_gp_update_state_deoffloading

The name nocb_gp_update_state() is unenlightening, so this commit changes
it to nocb_gp_update_state_deoffloading().  This function now does what
its name says, updates state and returns true if the CPU corresponding to
the specified rcu_data structure is in the process of being de-offloaded.

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>
Signed-off-by: Paul E. McKenney <paulmck@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 6a7f77d..93d3938 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2016,7 +2016,8 @@ 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;
 
@@ -2026,7 +2027,7 @@ 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;
 	}
 
 	/*
@@ -2037,7 +2038,7 @@ 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;
 }
 
 
@@ -2075,7 +2076,7 @@ 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);