lockdep: BFS cleanup
Some cleanups of the lockdep code after the BFS series:
- Remove the last traces of the generation id
- Fixup comment style
- Move the bfs routines into lockdep.c
- Cleanup the bfs routines
[ tom.leiming@gmail.com: Fix crash ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1246201486-7308-11-git-send-email-tom.leiming@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index 6baa880..a2ee95a 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -91,6 +91,8 @@
extern unsigned int max_lockdep_depth;
extern unsigned int max_recursion_depth;
+extern unsigned int max_bfs_queue_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 *);
@@ -136,98 +138,3 @@
# define debug_atomic_dec(ptr) do { } while (0)
# define debug_atomic_read(ptr) 0
#endif
-
-
-extern unsigned int max_bfs_queue_depth;
-extern unsigned long nr_list_entries;
-extern struct lock_list list_entries[MAX_LOCKDEP_ENTRIES];
-extern unsigned long bfs_accessed[];
-
-/*For good efficiency of modular, we use power of 2*/
-#define MAX_CIRCULAR_QUE_SIZE 4096UL
-
-/* The circular_queue and helpers is used to implement the
- * breadth-first search(BFS)algorithem, by which we can build
- * the shortest path from the next lock to be acquired to the
- * previous held lock if there is a circular between them.
- * */
-struct circular_queue{
- unsigned long element[MAX_CIRCULAR_QUE_SIZE];
- unsigned int front, rear;
-};
-
-static inline void __cq_init(struct circular_queue *cq)
-{
- cq->front = cq->rear = 0;
- bitmap_zero(bfs_accessed, MAX_LOCKDEP_ENTRIES);
-}
-
-static inline int __cq_empty(struct circular_queue *cq)
-{
- return (cq->front == cq->rear);
-}
-
-static inline int __cq_full(struct circular_queue *cq)
-{
- return ((cq->rear + 1)&(MAX_CIRCULAR_QUE_SIZE-1)) == cq->front;
-}
-
-static inline int __cq_enqueue(struct circular_queue *cq, unsigned long elem)
-{
- if (__cq_full(cq))
- return -1;
-
- cq->element[cq->rear] = elem;
- cq->rear = (cq->rear + 1)&(MAX_CIRCULAR_QUE_SIZE-1);
- return 0;
-}
-
-static inline int __cq_dequeue(struct circular_queue *cq, unsigned long *elem)
-{
- if (__cq_empty(cq))
- return -1;
-
- *elem = cq->element[cq->front];
- cq->front = (cq->front + 1)&(MAX_CIRCULAR_QUE_SIZE-1);
- return 0;
-}
-
-static inline unsigned int __cq_get_elem_count(struct circular_queue *cq)
-{
- return (cq->rear - cq->front)&(MAX_CIRCULAR_QUE_SIZE-1);
-}
-
-static inline void mark_lock_accessed(struct lock_list *lock,
- struct lock_list *parent)
-{
- unsigned long nr;
- nr = lock - list_entries;
- WARN_ON(nr >= nr_list_entries);
- lock->parent = parent;
- set_bit(nr, bfs_accessed);
-}
-
-static inline unsigned long lock_accessed(struct lock_list *lock)
-{
- unsigned long nr;
- nr = lock - list_entries;
- WARN_ON(nr >= nr_list_entries);
- return test_bit(nr, bfs_accessed);
-}
-
-static inline struct lock_list *get_lock_parent(struct lock_list *child)
-{
- return child->parent;
-}
-
-static inline int get_lock_depth(struct lock_list *child)
-{
- int depth = 0;
- struct lock_list *parent;
-
- while ((parent = get_lock_parent(child))) {
- child = parent;
- depth++;
- }
- return depth;
-}