struct stack_trace trace;
int distance;
- /*The parent field is used to implement breadth-first search,and
- *the bit 0 is reused to indicate if the lock has been accessed
- *in BFS.
+ /*
+ * The parent field is used to implement breadth-first search, and the
+ * bit 0 is reused to indicate if the lock has been accessed in BFS.
*/
struct lock_list *parent;
};
* interrupt context:
*/
unsigned int irq_context:2; /* bit 0 - soft, bit 1 - hard */
- unsigned int trylock:1;
+ unsigned int trylock:1; /* 16 bits */
+
unsigned int read:2; /* see lock_acquire() comment */
unsigned int check:2; /* see lock_acquire() comment */
unsigned int hardirqs_off:1;
+ unsigned int references:11; /* 32 bits */
};
/*
extern void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip);
+#define lockdep_is_held(lock) lock_is_held(&(lock)->dep_map)
+
+extern int lock_is_held(struct lockdep_map *lock);
+
extern void lock_set_class(struct lockdep_map *lock, const char *name,
struct lock_class_key *key, unsigned int subclass,
unsigned long ip);
#define lockdep_depth(tsk) (debug_locks ? (tsk)->lockdep_depth : 0)
+#define lockdep_assert_held(l) WARN_ON(debug_locks && !lockdep_is_held(l))
+
#else /* !LOCKDEP */
static inline void lockdep_off(void)
#define lockdep_depth(tsk) (0)
+#define lockdep_assert_held(l) do { } while (0)
+
#endif /* !LOCKDEP */
#ifdef CONFIG_LOCK_STAT
# define might_lock_read(lock) do { } while (0)
#endif
+#ifdef CONFIG_PROVE_RCU
+extern void lockdep_rcu_dereference(const char *file, const int line);
+#endif
+
#endif /* __LINUX_LOCKDEP_H */