[PATCH] lockdep: build fix

[Ingo Molnar]

fix:

 kernel/built-in.o: In function `lockdep_stats_show':
 lockdep_proc.c:(.text+0x3cb2f): undefined reference to `lockdep_count_forward_deps'
 kernel/built-in.o: In function `l_show':
 lockdep_proc.c:(.text+0x3d02b): undefined reference to `lockdep_count_forward_deps'
 lockdep_proc.c:(.text+0x3d047): undefined reference to `lockdep_count_backward_deps'

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 kernel/lockdep_internals.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index 68d44ec..f5c6a14 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -53,8 +53,21 @@ extern unsigned int nr_process_chains;
 extern unsigned int max_lockdep_depth;
 extern unsigned int max_recursion_depth;
 
+#ifdef CONFIG_PROVE_LOCKING
 extern unsigned long lockdep_count_forward_deps(struct lock_class *);
 extern unsigned long lockdep_count_backward_deps(struct lock_class *);
+#else
+static inline unsigned long
+lockdep_count_forward_deps(struct lock_class *class)
+{
+	return 0;
+}
+static inline unsigned long
+lockdep_count_backward_deps(struct lock_class *class)
+{
+	return 0;
+}
+#endif
 
 #ifdef CONFIG_DEBUG_LOCKDEP
 /*
--
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