linux-kernel - [PATCH v2 21/27] rcu: Rename struct rcu_data .exp_dynticks_snap into .exp_watching

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Date: Tue, 30 Apr 2024 11:17:25 +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 21/27] rcu: Rename struct rcu_data .exp_dynticks_snap into .exp_watching_snap

The context_tracking.state RCU_DYNTICKS subvariable has been renamed to
RCU_WATCHING, and the snapshot helpers are now prefix by
"rcu_watching". Reflect that change into the storage variables for these
snapshots.

Signed-off-by: Valentin Schneider <vschneid@...hat.com>
---
 kernel/rcu/tree.h     | 2 +-
 kernel/rcu/tree_exp.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index ac153e365355d..d0d6f46f12871 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -215,7 +215,7 @@ struct rcu_data {
 	/* 4) rcu_barrier(), OOM callbacks, and expediting. */
 	unsigned long barrier_seq_snap;	/* Snap of rcu_state.barrier_sequence. */
 	struct rcu_head barrier_head;
-	int exp_dynticks_snap;		/* Double-check need for IPI. */
+	int exp_watching_snap;		/* Double-check need for IPI. */
 
 	/* 5) Callback offloading. */
 #ifdef CONFIG_RCU_NOCB_CPU
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 4046fae99517e..d1b80ed7c3d65 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -361,7 +361,7 @@ static void __sync_rcu_exp_select_node_cpus(struct rcu_exp_work *rewp)
 			if (rcu_watching_in_eqs(snap))
 				mask_ofl_test |= mask;
 			else
-				rdp->exp_dynticks_snap = snap;
+				rdp->exp_watching_snap = snap;
 		}
 	}
 	mask_ofl_ipi = rnp->expmask & ~mask_ofl_test;
@@ -381,7 +381,7 @@ static void __sync_rcu_exp_select_node_cpus(struct rcu_exp_work *rewp)
 		unsigned long mask = rdp->grpmask;
 
 retry_ipi:
-		if (rcu_watching_changed_since(rdp, rdp->exp_dynticks_snap)) {
+		if (rcu_watching_changed_since(rdp, rdp->exp_watching_snap)) {
 			mask_ofl_test |= mask;
 			continue;
 		}
-- 
2.43.0