X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=include%2Flinux%2Flockdep.h;h=3d3386b88b6aeb043f3bca3f49a75eb3f62e5c43;hb=4b32d0a4e9ec07808a5c406a416c6576c986b047;hp=498bfbd3b4e1acfdd0ba200e21e6a91c3eab2e3f;hpb=ea14fad0d416354a4e9bb1a04f32acba706f9548;p=deliverable%2Flinux.git

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 498bfbd3b4e1..3d3386b88b6a 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -1,13 +1,17 @@
 /*
  * Runtime locking correctness validator
  *
- *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
+ *  Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
+ *  Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
  *
  * see Documentation/lockdep-design.txt for more details.
  */
 #ifndef __LINUX_LOCKDEP_H
 #define __LINUX_LOCKDEP_H
 
+struct task_struct;
+struct lockdep_map;
+
 #ifdef CONFIG_LOCKDEP
 
 #include <linux/linkage.h>
@@ -112,8 +116,32 @@ struct lock_class {
 
 	const char			*name;
 	int				name_version;
+
+#ifdef CONFIG_LOCK_STAT
+	unsigned long			contention_point[4];
+#endif
+};
+
+#ifdef CONFIG_LOCK_STAT
+struct lock_time {
+	s64				min;
+	s64				max;
+	s64				total;
+	unsigned long			nr;
+};
+
+struct lock_class_stats {
+	unsigned long			contention_point[4];
+	struct lock_time		read_waittime;
+	struct lock_time		write_waittime;
+	struct lock_time		read_holdtime;
+	struct lock_time		write_holdtime;
 };
 
+struct lock_class_stats lock_stats(struct lock_class *class);
+void clear_lock_stats(struct lock_class *class);
+#endif
+
 /*
  * Map the lock object (the lock instance) to the lock-class object.
  * This is embedded into specific lock instances:
@@ -132,6 +160,7 @@ struct lock_list {
 	struct list_head		entry;
 	struct lock_class		*class;
 	struct stack_trace		trace;
+	int				distance;
 };
 
 /*
@@ -162,6 +191,10 @@ struct held_lock {
 	unsigned long			acquire_ip;
 	struct lockdep_map		*instance;
 
+#ifdef CONFIG_LOCK_STAT
+	u64 				waittime_stamp;
+	u64				holdtime_stamp;
+#endif
 	/*
 	 * The lock-stack is unified in that the lock chains of interrupt
 	 * contexts nest ontop of process context chains, but we 'separate'
@@ -242,7 +275,7 @@ extern void lock_release(struct lockdep_map *lock, int nested,
 
 # define INIT_LOCKDEP				.lockdep_recursion = 0,
 
-#define lockdep_depth(tsk)	((tsk)->lockdep_depth)
+#define lockdep_depth(tsk)	(debug_locks ? (tsk)->lockdep_depth : 0)
 
 #else /* !LOCKDEP */
 
@@ -278,18 +311,52 @@ struct lock_class_key { };
 
 #endif /* !LOCKDEP */
 
+#ifdef CONFIG_LOCK_STAT
+
+extern void lock_contended(struct lockdep_map *lock, unsigned long ip);
+extern void lock_acquired(struct lockdep_map *lock);
+
+#define LOCK_CONTENDED(_lock, try, lock)			\
+do {								\
+	if (!try(_lock)) {					\
+		lock_contended(&(_lock)->dep_map, _RET_IP_);	\
+		lock(_lock);					\
+		lock_acquired(&(_lock)->dep_map);		\
+	}							\
+} while (0)
+
+#else /* CONFIG_LOCK_STAT */
+
+#define lock_contended(lockdep_map, ip) do {} while (0)
+#define lock_acquired(lockdep_map) do {} while (0)
+
+#define LOCK_CONTENDED(_lock, try, lock) \
+	lock(_lock)
+
+#endif /* CONFIG_LOCK_STAT */
+
 #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
 
 /*