linux-kernel - [PATCH] rcu-tasks: Add missing inline to show_rcu_tasks_rude_gp

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Date:   Fri, 16 Oct 2020 12:31:44 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     "Paul E . McKenney" <paulmck@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] rcu-tasks: Add missing inline to show_rcu_tasks_rude_gp_kthread() dummy

If CONFIG_TINY_RCU=y:

    In file included from kernel/rcu/update.c:591:
    kernel/rcu/tasks.h:710:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function]
     static void show_rcu_tasks_rude_gp_kthread(void) {}
		 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fix this by marking show_rcu_tasks_rude_gp_kthread() inline.

Fixes: e21408ceec2de5be ("rcu-tasks: Add RCU tasks to rcutorture writer stall output")
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
Exposed by commit 1e6c62a882155772 ("bpf: Introduce sleepable BPF
programs"), which selects TASKS_TRACE_RCU.
---
 kernel/rcu/tasks.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index d5d9f2d03e8a0ac9..8c290cc45e6fc63a 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -707,7 +707,7 @@ static void show_rcu_tasks_rude_gp_kthread(void)
 #endif /* #ifndef CONFIG_TINY_RCU */
 
 #else /* #ifdef CONFIG_TASKS_RUDE_RCU */
-static void show_rcu_tasks_rude_gp_kthread(void) {}
+static inline void show_rcu_tasks_rude_gp_kthread(void) {}
 #endif /* #else #ifdef CONFIG_TASKS_RUDE_RCU */
 
 ////////////////////////////////////////////////////////////////////////
-- 
2.17.1