rtmutex-tester: make it build without BKL

The big kernel lock is going away, so make sure
that if it is disabled by Kconfig, we do not
try to validate it, which would result in
compile errors.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>

kernel/rtmutex-tester.c

@@ -76,7 +76,9 @@ static int handle_op(struct test_thread_data *td, int lockwakeup)
 		}
 
 		if (!lockwakeup && td->bkl == 4) {
+#ifdef CONFIG_LOCK_KERNEL
 			unlock_kernel();
+#endif
 			td->bkl = 0;
 		}
 		return 0;
@@ -133,14 +135,18 @@ static int handle_op(struct test_thread_data *td, int lockwakeup)
 		if (td->bkl)
 			return 0;
 		td->bkl = 1;
+#ifdef CONFIG_LOCK_KERNEL
 		lock_kernel();
+#endif
 		td->bkl = 4;
 		return 0;
 
 	case RTTEST_UNLOCKBKL:
 		if (td->bkl != 4)
 			break;
+#ifdef CONFIG_LOCK_KERNEL
 		unlock_kernel();
+#endif
 		td->bkl = 0;
 		return 0;