rcu: Avoid sparse warnings in rcu_nocb_wake trace event

The event-tracing macros do not like bool tracing arguments, so this
commit makes them be of type char.  This change has the knock-on effect
of making it illegal to pass a pointer into one of these arguments, so
also change rcutiny's first call to trace_rcu_batch_end() to convert
from pointer to boolean, prefixing with "!!".

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 9ed6075dc562..80b6e273f1c5 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -273,7 +273,7 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
         if (&rcp->rcucblist == rcp->donetail) {
                 RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, 0, -1));
                 RCU_TRACE(trace_rcu_batch_end(rcp->name, 0,
-                                              ACCESS_ONCE(rcp->rcucblist),
+                                              !!ACCESS_ONCE(rcp->rcucblist),
                                               need_resched(),
                                               is_idle_task(current),
                                               false));