linux-kernel - [PATCH 2/8] rcu: Mark rcu_dynticks_curr_cpu_in

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Date:   Wed, 12 Feb 2020 10:32:12 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        rostedt@...dmis.org
Cc:     peterz@...radead.org, mingo@...nel.org, joel@...lfernandes.org,
        gregkh@...uxfoundation.org, gustavo@...eddedor.com,
        tglx@...utronix.de, paulmck@...nel.org, josh@...htriplett.org,
        mathieu.desnoyers@...icios.com, jiangshanlai@...il.com
Subject: [PATCH 2/8] rcu: Mark rcu_dynticks_curr_cpu_in_eqs() inline

Since rcu_is_watching() is notrace (and needs to be, as it can be
called from the tracers), make sure everything it in turn calls is
notrace too.

To that effect, mark rcu_dynticks_curr_cpu_in_eqs() inline, which
implies notrace, as the function is tiny.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/rcu/tree.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -294,7 +294,7 @@ static void rcu_dynticks_eqs_online(void
  *
  * No ordering, as we are sampling CPU-local information.
  */
-static bool rcu_dynticks_curr_cpu_in_eqs(void)
+static inline bool rcu_dynticks_curr_cpu_in_eqs(void)
 {
 	struct rcu_data *rdp = this_cpu_ptr(&rcu_data);