lockdep: Fix BFS build

Fix:

  kernel/built-in.o: In function `lockdep_stats_show':
  lockdep_proc.c:(.text+0x48202): undefined reference to `max_bfs_queue_depth'

As max_bfs_queue_depth is only available under
CONFIG_PROVE_LOCKING=y.

Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 9a1bf34d2ff636097e4b1c3ea007d2f7e041d9ea..fba81f16e3462a99466a3fda597f29631e0e1a9f 100644 (file)
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -411,8 +411,10 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
                        max_lockdep_depth);
        seq_printf(m, " max recursion depth:           %11u\n",
                        max_recursion_depth);
+#ifdef CONFIG_PROVE_LOCKING
        seq_printf(m, " max bfs queue depth:           %11u\n",
                        max_bfs_queue_depth);
+#endif
        lockdep_stats_debug_show(m);
        seq_printf(m, " debug_locks:                   %11u\n",
                        debug_locks);