lockdep: Introduce print_shortest_lock_dependencies

Since the shortest lock dependencies' path may be obtained by BFS,
we print the shortest one by print_shortest_lock_dependencies().

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1246201486-7308-7-git-send-email-tom.leiming@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index c2f6594966f3..b115aaa0bf35 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -219,9 +219,9 @@ static inline struct lock_list *get_lock_parent(struct lock_list *child)
         return child->parent;
 }
 
-static inline unsigned long get_lock_depth(struct lock_list *child)
+static inline int get_lock_depth(struct lock_list *child)
 {
-        unsigned long depth = 0;
+        int depth = 0;
         struct lock_list *parent;
 
         while ((parent = get_lock_parent(child))) {