rcu: Inline RCU task stall-warning helper functions

The rcu_print_detail_task_stall(), rcu_print_task_stall_begin(), and
rcu_print_task_stall_end() functions were defined to allow long-gone
Kconfig options to provide an abbreviated RCU CPU stall warning printout.
This commit saves a few lines of code by inlining them into their sole
callers.

While in the area, a useless call of rcu_print_detail_task_stall_rnp()
on the root rcu_node structure was eliminated.  If there is only one
rcu_node structure, its tasks get printed twice, but if there are more,
the root rcu_node structure is guaranteed to have an empty list of blocked
tasks, hence the uselessness.  (Long ago, root rcu_node structures with
non-empty ->blkd_tasks lists could happen, but no longer.)

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 3c4e26fff806..c6df9a13dd06 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -445,7 +445,6 @@ static void rcu_dynticks_task_enter(void);
 static void rcu_dynticks_task_exit(void);
 
 /* Forward declarations for tree_stall.h */
-static void rcu_print_detail_task_stall(void);
 static int rcu_print_task_stall(struct rcu_node *rnp);
 static void record_gp_stall_check_time(void);
 static void check_cpu_stall(struct rcu_data *rdp);