linux-kernel - [PATCH v2 17/27] rcu: Rename rcu_dynticks_in_eqs() into rcu_watching_in

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Message-ID: <20240430091740.1826862-18-vschneid@redhat.com>
Date: Tue, 30 Apr 2024 11:17:21 +0200
From: Valentin Schneider <vschneid@...hat.com>
To: rcu@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Frederic Weisbecker <frederic@...nel.org>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Neeraj Upadhyay <quic_neeraju@...cinc.com>,
	Joel Fernandes <joel@...lfernandes.org>,
	Josh Triplett <josh@...htriplett.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang1211@...il.com>
Subject: [PATCH v2 17/27] rcu: Rename rcu_dynticks_in_eqs() into rcu_watching_in_eqs()

The context_tracking.state RCU_DYNTICKS subvariable has been renamed to
RCU_WATCHING, reflect that change in the related helpers.

Signed-off-by: Valentin Schneider <vschneid@...hat.com>
---
 kernel/rcu/tree.c       | 8 ++++----
 kernel/rcu/tree_exp.h   | 2 +-
 kernel/rcu/tree_stall.h | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 857c2565efeac..d772755ccd564 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -308,9 +308,9 @@ static int rcu_watching_snap(int cpu)
 
 /*
  * Return true if the snapshot returned from rcu_watching_snap()
- * indicates that RCU is in an extended quiescent state.
+ * indicates that RCU in an extended quiescent state (not watching).
  */
-static bool rcu_dynticks_in_eqs(int snap)
+static bool rcu_watching_in_eqs(int snap)
 {
 	return !(snap & CT_RCU_WATCHING);
 }
@@ -771,7 +771,7 @@ static void rcu_gpnum_ovf(struct rcu_node *rnp, struct rcu_data *rdp)
 static int dyntick_save_progress_counter(struct rcu_data *rdp)
 {
 	rdp->dynticks_snap = rcu_watching_snap(rdp->cpu);
-	if (rcu_dynticks_in_eqs(rdp->dynticks_snap)) {
+	if (rcu_watching_in_eqs(rdp->dynticks_snap)) {
 		trace_rcu_fqs(rcu_state.name, rdp->gp_seq, rdp->cpu, TPS("dti"));
 		rcu_gpnum_ovf(rdp->mynode, rdp);
 		return 1;
@@ -4798,7 +4798,7 @@ rcu_boot_init_percpu_data(int cpu)
 	rdp->grpmask = leaf_node_cpu_bit(rdp->mynode, cpu);
 	INIT_WORK(&rdp->strict_work, strict_work_handler);
 	WARN_ON_ONCE(ct->nesting != 1);
-	WARN_ON_ONCE(rcu_dynticks_in_eqs(rcu_watching_snap(cpu)));
+	WARN_ON_ONCE(rcu_watching_in_eqs(rcu_watching_snap(cpu)));
 	rdp->barrier_seq_snap = rcu_state.barrier_sequence;
 	rdp->rcu_ofl_gp_seq = rcu_state.gp_seq;
 	rdp->rcu_ofl_gp_state = RCU_GP_CLEANED;
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 50ec57304c1b7..68dea1427c8bd 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -358,7 +358,7 @@ static void __sync_rcu_exp_select_node_cpus(struct rcu_exp_work *rewp)
 			mask_ofl_test |= mask;
 		} else {
 			snap = rcu_watching_snap(cpu);
-			if (rcu_dynticks_in_eqs(snap))
+			if (rcu_watching_in_eqs(snap))
 				mask_ofl_test |= mask;
 			else
 				rdp->exp_dynticks_snap = snap;
diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 4fa23f9fc207f..589f1be8ff921 100644
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -501,7 +501,7 @@ static void print_cpu_stall_info(int cpu)
 	}
 	delta = rcu_seq_ctr(rdp->mynode->gp_seq - rdp->rcu_iw_gp_seq);
 	falsepositive = rcu_is_gp_kthread_starving(NULL) &&
-			rcu_dynticks_in_eqs(rcu_watching_snap(cpu));
+			rcu_watching_in_eqs(rcu_watching_snap(cpu));
 	rcuc_starved = rcu_is_rcuc_kthread_starving(rdp, &j);
 	if (rcuc_starved)
 		// Print signed value, as negative values indicate a probable bug.
-- 
2.43.0