[PATCH] lockdep: lockdep_depth vs. debug_locks

[sfrench/cifs-2.6.git] / include / linux / lockdep.h

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 1314ca0f29be78f637f027614d09d5a062e091a2..14c937d345cb135916fff7a44878a631b9ae3813 100644 (file)
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -8,6 +8,8 @@
 #ifndef __LINUX_LOCKDEP_H
 #define __LINUX_LOCKDEP_H
 
+struct task_struct;
+
 #ifdef CONFIG_LOCKDEP
 
 #include <linux/linkage.h>
@@ -132,6 +134,7 @@ struct lock_list {
        struct list_head                entry;
        struct lock_class               *class;
        struct stack_trace              trace;
+       int                             distance;
 };
 
 /*
@@ -193,7 +196,6 @@ extern void lockdep_free_key_range(void *start, unsigned long size);
 
 extern void lockdep_off(void);
 extern void lockdep_on(void);
-extern int lockdep_internal(void);
 
 /*
  * These methods are used by specific locking variants (spinlocks,
@@ -202,7 +204,7 @@ extern int lockdep_internal(void);
  */
 
 extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
-                            struct lock_class_key *key);
+                            struct lock_class_key *key, int subclass);
 
 /*
  * Reinitialize a lock key - for cases where there is special locking or
@@ -211,9 +213,14 @@ extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
  * or they are too narrow (they suffer from a false class-split):
  */
 #define lockdep_set_class(lock, key) \
-               lockdep_init_map(&(lock)->dep_map, #key, key)
+               lockdep_init_map(&(lock)->dep_map, #key, key, 0)
 #define lockdep_set_class_and_name(lock, key, name) \
-               lockdep_init_map(&(lock)->dep_map, name, key)
+               lockdep_init_map(&(lock)->dep_map, name, key, 0)
+#define lockdep_set_class_and_subclass(lock, key, sub) \
+               lockdep_init_map(&(lock)->dep_map, #key, key, sub)
+#define lockdep_set_subclass(lock, sub)        \
+               lockdep_init_map(&(lock)->dep_map, #lock, \
+                                (lock)->dep_map.key, sub)
 
 /*
  * Acquire a lock.
@@ -238,6 +245,8 @@ extern void lock_release(struct lockdep_map *lock, int nested,
 
 # define INIT_LOCKDEP                          .lockdep_recursion = 0,
 
+#define lockdep_depth(tsk)     (debug_locks ? (tsk)->lockdep_depth : 0)
+
 #else /* !LOCKDEP */
 
 static inline void lockdep_off(void)
@@ -248,19 +257,18 @@ static inline void lockdep_on(void)
 {
 }
 
-static inline int lockdep_internal(void)
-{
-       return 0;
-}
-
 # define lock_acquire(l, s, t, r, c, i)                do { } while (0)
 # define lock_release(l, n, i)                 do { } while (0)
 # define lockdep_init()                                do { } while (0)
 # define lockdep_info()                                do { } while (0)
-# define lockdep_init_map(lock, name, key)     do { (void)(key); } while (0)
+# define lockdep_init_map(lock, name, key, sub)        do { (void)(key); } while (0)
 # define lockdep_set_class(lock, key)          do { (void)(key); } while (0)
 # define lockdep_set_class_and_name(lock, key, name) \
                do { (void)(key); } while (0)
+#define lockdep_set_class_and_subclass(lock, key, sub) \
+               do { (void)(key); } while (0)
+#define lockdep_set_subclass(lock, sub)                do { } while (0)
+
 # define INIT_LOCKDEP
 # define lockdep_reset()               do { debug_locks = 1; } while (0)
 # define lockdep_free_key_range(start, size)   do { } while (0)
@@ -268,20 +276,33 @@ static inline int lockdep_internal(void)
  * The class key takes no space if lockdep is disabled:
  */
 struct lock_class_key { };
+
+#define lockdep_depth(tsk)     (0)
+
 #endif /* !LOCKDEP */
 
 #if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_GENERIC_HARDIRQS)
 extern void early_init_irq_lock_class(void);
 #else
-# define early_init_irq_lock_class()           do { } while (0)
+static inline void early_init_irq_lock_class(void)
+{
+}
 #endif
 
 #ifdef CONFIG_TRACE_IRQFLAGS
 extern void early_boot_irqs_off(void);
 extern void early_boot_irqs_on(void);
+extern void print_irqtrace_events(struct task_struct *curr);
 #else
-# define early_boot_irqs_off()                 do { } while (0)
-# define early_boot_irqs_on()                  do { } while (0)
+static inline void early_boot_irqs_off(void)
+{
+}
+static inline void early_boot_irqs_on(void)
+{
+}
+static inline void print_irqtrace_events(struct task_struct *curr)
+{
+}
 #endif
 
 /*