Merge branch 'v2.6.24-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep

* 'v2.6.24-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep:
  lockdep: annotate dir vs file i_mutex
  lockdep: per filesystem inode lock class
  lockdep: annotate kprobes irq fiddling
  lockdep: annotate rcu_read_{,un}lock{,_bh}
  lockdep: annotate journal_start()
  lockdep: s390: connect the sysexit hook
  lockdep: x86_64: connect the sysexit hook
  lockdep: i386: connect the sysexit hook
  lockdep: syscall exit check
  lockdep: fixup mutex annotations
  lockdep: fix mismatched lockdep_depth/curr_chain_hash
  lockdep: Avoid /proc/lockdep & lock_stat infinite output
  lockdep: maintainers

7 files changed, 67 insertions, 3 deletions

diff --git a/include/asm-x86/irqflags_32.h b/include/asm-x86/irqflags_32.h
index eff8585cb741..d058b04e0083 100644
--- a/include/asm-x86/irqflags_32.h
+++ b/include/asm-x86/irqflags_32.h
@@ -160,4 +160,17 @@ static inline int raw_irqs_disabled(void)
 # define TRACE_IRQS_OFF
 #endif
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define LOCKDEP_SYS_EXIT                       \
+        pushl %eax;                             \
+        pushl %ecx;                             \
+        pushl %edx;                             \
+        call lockdep_sys_exit;                  \
+        popl %edx;                              \
+        popl %ecx;                              \
+        popl %eax;
+#else
+# define LOCKDEP_SYS_EXIT
+#endif
+
 #endif
diff --git a/include/asm-x86/irqflags_64.h b/include/asm-x86/irqflags_64.h
index 86e70fe23659..5341ea1f815a 100644
--- a/include/asm-x86/irqflags_64.h
+++ b/include/asm-x86/irqflags_64.h
@@ -137,6 +137,20 @@ static inline void halt(void)
 #  define TRACE_IRQS_ON
 #  define TRACE_IRQS_OFF
 # endif
+# ifdef CONFIG_DEBUG_LOCK_ALLOC
+#  define LOCKDEP_SYS_EXIT      call lockdep_sys_exit_thunk
+#  define LOCKDEP_SYS_EXIT_IRQ  \
+        TRACE_IRQS_ON; \
+        sti; \
+        SAVE_REST; \
+        LOCKDEP_SYS_EXIT; \
+        RESTORE_REST; \
+        cli; \
+        TRACE_IRQS_OFF;
+# else
+#  define LOCKDEP_SYS_EXIT
+#  define LOCKDEP_SYS_EXIT_IRQ
+# endif
 #endif
 
 #endif
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 16421f662a7a..6d760f1ad875 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1302,8 +1302,14 @@ struct file_system_type {
         struct module *owner;
         struct file_system_type * next;
         struct list_head fs_supers;
+
         struct lock_class_key s_lock_key;
         struct lock_class_key s_umount_key;
+
+        struct lock_class_key i_lock_key;
+        struct lock_class_key i_mutex_key;
+        struct lock_class_key i_mutex_dir_key;
+        struct lock_class_key i_alloc_sem_key;
 };
 
 extern int get_sb_bdev(struct file_system_type *fs_type,
diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index 452737551260..700a93b79189 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -30,6 +30,7 @@
 #include <linux/bit_spinlock.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
+#include <linux/lockdep.h>
 
 #include <asm/semaphore.h>
 #endif
@@ -396,6 +397,10 @@ struct handle_s
         unsigned int    h_sync:         1;      /* sync-on-close */
         unsigned int    h_jdata:        1;      /* force data journaling */
         unsigned int    h_aborted:      1;      /* fatal error on handle */
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+        struct lockdep_map      h_lockdep_map;
+#endif
 };
 
 
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 0e843bf65877..f6279f68a827 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -238,6 +238,7 @@ extern void lockdep_info(void);
 extern void lockdep_reset(void);
 extern void lockdep_reset_lock(struct lockdep_map *lock);
 extern void lockdep_free_key_range(void *start, unsigned long size);
+extern void lockdep_sys_exit(void);
 
 extern void lockdep_off(void);
 extern void lockdep_on(void);
@@ -252,6 +253,13 @@ extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
                              struct lock_class_key *key, int subclass);
 
 /*
+ * To initialize a lockdep_map statically use this macro.
+ * Note that _name must not be NULL.
+ */
+#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
+        { .name = (_name), .key = (void *)(_key), }
+
+/*
  * Reinitialize a lock key - for cases where there is special locking or
  * special initialization of locks so that the validator gets the scope
  * of dependencies wrong: they are either too broad (they need a class-split)
@@ -317,6 +325,7 @@ static inline void lockdep_on(void)
 # define INIT_LOCKDEP
 # define lockdep_reset()                do { debug_locks = 1; } while (0)
 # define lockdep_free_key_range(start, size)    do { } while (0)
+# define lockdep_sys_exit()                     do { } while (0)
 /*
  * The class key takes no space if lockdep is disabled:
  */
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 0d50ea3df689..6a735c72f23f 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -120,14 +120,17 @@ static inline int fastcall mutex_is_locked(struct mutex *lock)
  * See kernel/mutex.c for detailed documentation of these APIs.
  * Also see Documentation/mutex-design.txt.
  */
-extern void fastcall mutex_lock(struct mutex *lock);
-extern int __must_check fastcall mutex_lock_interruptible(struct mutex *lock);
-
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
 extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock,
                                         unsigned int subclass);
+
+#define mutex_lock(lock) mutex_lock_nested(lock, 0)
+#define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0)
 #else
+extern void fastcall mutex_lock(struct mutex *lock);
+extern int __must_check fastcall mutex_lock_interruptible(struct mutex *lock);
+
 # define mutex_lock_nested(lock, subclass) mutex_lock(lock)
 # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
 #endif
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index fe17d7d750c2..76c1a530edc5 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -41,6 +41,7 @@
 #include <linux/percpu.h>
 #include <linux/cpumask.h>
 #include <linux/seqlock.h>
+#include <linux/lockdep.h>
 
 /**
  * struct rcu_head - callback structure for use with RCU
@@ -133,6 +134,15 @@ static inline void rcu_bh_qsctr_inc(int cpu)
 extern int rcu_pending(int cpu);
 extern int rcu_needs_cpu(int cpu);
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+extern struct lockdep_map rcu_lock_map;
+# define rcu_read_acquire()     lock_acquire(&rcu_lock_map, 0, 0, 2, 1, _THIS_IP_)
+# define rcu_read_release()     lock_release(&rcu_lock_map, 1, _THIS_IP_)
+#else
+# define rcu_read_acquire()     do { } while (0)
+# define rcu_read_release()     do { } while (0)
+#endif
+
 /**
  * rcu_read_lock - mark the beginning of an RCU read-side critical section.
  *
@@ -166,6 +176,7 @@ extern int rcu_needs_cpu(int cpu);
         do { \
                 preempt_disable(); \
                 __acquire(RCU); \
+                rcu_read_acquire(); \
         } while(0)
 
 /**
@@ -175,6 +186,7 @@ extern int rcu_needs_cpu(int cpu);
  */
 #define rcu_read_unlock() \
         do { \
+                rcu_read_release(); \
                 __release(RCU); \
                 preempt_enable(); \
         } while(0)
@@ -204,6 +216,7 @@ extern int rcu_needs_cpu(int cpu);
         do { \
                 local_bh_disable(); \
                 __acquire(RCU_BH); \
+                rcu_read_acquire(); \
         } while(0)
 
 /*
@@ -213,6 +226,7 @@ extern int rcu_needs_cpu(int cpu);
  */
 #define rcu_read_unlock_bh() \
         do { \
+                rcu_read_release(); \
                 __release(RCU_BH); \
                 local_bh_enable(); \
         } while(0)