rcutorture: Fix a sparse warning by marking boost_mutex static

This commit fixes the following sparse warning by marking boost_mutex
static:

kernel/rcu/rcutorture.c:185:1: warning: symbol 'boost_mutex' was not declared. Should it be static?

Signed-off-by: Pranith Kumar <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Reviewed-by: Josh Triplett <[email protected]>

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 948a7693748ed3d0be04fb022d5ac6a195903e3c..7e67711cbae81c460fd16c70c4324d34c80dc556 100644 (file)
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -182,7 +182,7 @@ static u64 notrace rcu_trace_clock_local(void)
 #endif /* #else #ifdef CONFIG_RCU_TRACE */
 
 static unsigned long boost_starttime;  /* jiffies of next boost test start. */
-DEFINE_MUTEX(boost_mutex);             /* protect setting boost_starttime */
+static DEFINE_MUTEX(boost_mutex);      /* protect setting boost_starttime */
                                        /*  and boost task create/destroy. */
 static atomic_t barrier_cbs_count;     /* Barrier callbacks registered. */
 static bool barrier_phase;             /* Test phase. */