[PATCH] rcu-tasks: Add missing inline to show_rcu_tasks_rude_gp_kthread() dummy

[Geert Uytterhoeven]

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 <ge...@linux-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