Merge git://git.infradead.org/~dwmw2/dwmw2-2.6.27

[pandora-kernel.git] / include / linux / lockdep.h

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 2486eb4..331e5f1 100644 (file)
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -89,6 +89,7 @@ struct lock_class {
 
        struct lockdep_subclass_key     *key;
        unsigned int                    subclass;
+       unsigned int                    dep_gen_id;
 
        /*
         * IRQ/softirq usage tracking bits:
@@ -189,6 +190,14 @@ struct lock_chain {
        u64                             chain_key;
 };
 
+#define MAX_LOCKDEP_KEYS_BITS          13
+/*
+ * Subtract one because we offset hlock->class_idx by 1 in order
+ * to make 0 mean no class. This avoids overflowing the class_idx
+ * bitfield and hitting the BUG in hlock_class().
+ */
+#define MAX_LOCKDEP_KEYS               ((1UL << MAX_LOCKDEP_KEYS_BITS) - 1)
+
 struct held_lock {
        /*
         * One-way hash of the dependency chain up to this point. We
@@ -205,14 +214,14 @@ struct held_lock {
         * with zero), here we store the previous hash value:
         */
        u64                             prev_chain_key;
-       struct lock_class               *class;
        unsigned long                   acquire_ip;
        struct lockdep_map              *instance;
-
+       struct lockdep_map              *nest_lock;
 #ifdef CONFIG_LOCK_STAT
        u64                             waittime_stamp;
        u64                             holdtime_stamp;
 #endif
+       unsigned int                    class_idx:MAX_LOCKDEP_KEYS_BITS;
        /*
         * The lock-stack is unified in that the lock chains of interrupt
         * contexts nest ontop of process context chains, but we 'separate'
@@ -226,11 +235,11 @@ struct held_lock {
         * The following field is used to detect when we cross into an
         * interrupt context:
         */
-       int                             irq_context;
-       int                             trylock;
-       int                             read;
-       int                             check;
-       int                             hardirqs_off;
+       unsigned int irq_context:2; /* bit 0 - soft, bit 1 - hard */
+       unsigned int trylock:1;
+       unsigned int read:2;        /* see lock_acquire() comment */
+       unsigned int check:2;       /* see lock_acquire() comment */
+       unsigned int hardirqs_off:1;
 };
 
 /*
@@ -294,11 +303,15 @@ extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
  *   2: full validation
  */
 extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
-                        int trylock, int read, int check, unsigned long ip);
+                        int trylock, int read, int check,
+                        struct lockdep_map *nest_lock, unsigned long ip);
 
 extern void lock_release(struct lockdep_map *lock, int nested,
                         unsigned long ip);
 
+extern void lock_set_subclass(struct lockdep_map *lock, unsigned int subclass,
+                             unsigned long ip);
+
 # define INIT_LOCKDEP                          .lockdep_recursion = 0,
 
 #define lockdep_depth(tsk)     (debug_locks ? (tsk)->lockdep_depth : 0)
@@ -313,8 +326,9 @@ static inline void lockdep_on(void)
 {
 }
 
-# define lock_acquire(l, s, t, r, c, i)                do { } while (0)
+# define lock_acquire(l, s, t, r, c, n, i)     do { } while (0)
 # define lock_release(l, n, i)                 do { } while (0)
+# define lock_set_subclass(l, s, i)            do { } while (0)
 # define lockdep_init()                                do { } while (0)
 # define lockdep_info()                                do { } while (0)
 # define lockdep_init_map(lock, name, key, sub)        do { (void)(key); } while (0)
@@ -400,9 +414,11 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
-#  define spin_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 2, i)
+#  define spin_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 2, NULL, i)
+#  define spin_acquire_nest(l, s, t, n, i)     lock_acquire(l, s, t, 0, 2, n, i)
 # else
-#  define spin_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 1, i)
+#  define spin_acquire(l, s, t, i)             lock_acquire(l, s, t, 0, 1, NULL, i)
+#  define spin_acquire_nest(l, s, t, n, i)     lock_acquire(l, s, t, 0, 1, NULL, i)
 # endif
 # define spin_release(l, n, i)                 lock_release(l, n, i)
 #else
@@ -412,11 +428,11 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
-#  define rwlock_acquire(l, s, t, i)           lock_acquire(l, s, t, 0, 2, i)
-#  define rwlock_acquire_read(l, s, t, i)      lock_acquire(l, s, t, 2, 2, i)
+#  define rwlock_acquire(l, s, t, i)           lock_acquire(l, s, t, 0, 2, NULL, i)
+#  define rwlock_acquire_read(l, s, t, i)      lock_acquire(l, s, t, 2, 2, NULL, i)
 # else
-#  define rwlock_acquire(l, s, t, i)           lock_acquire(l, s, t, 0, 1, i)
-#  define rwlock_acquire_read(l, s, t, i)      lock_acquire(l, s, t, 2, 1, i)
+#  define rwlock_acquire(l, s, t, i)           lock_acquire(l, s, t, 0, 1, NULL, i)
+#  define rwlock_acquire_read(l, s, t, i)      lock_acquire(l, s, t, 2, 1, NULL, i)
 # endif
 # define rwlock_release(l, n, i)               lock_release(l, n, i)
 #else
@@ -427,9 +443,9 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
-#  define mutex_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 2, i)
+#  define mutex_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 2, NULL, i)
 # else
-#  define mutex_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 1, i)
+#  define mutex_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 1, NULL, i)
 # endif
 # define mutex_release(l, n, i)                        lock_release(l, n, i)
 #else
@@ -439,11 +455,11 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # ifdef CONFIG_PROVE_LOCKING
-#  define rwsem_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 2, i)
-#  define rwsem_acquire_read(l, s, t, i)       lock_acquire(l, s, t, 1, 2, i)
+#  define rwsem_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 2, NULL, i)
+#  define rwsem_acquire_read(l, s, t, i)       lock_acquire(l, s, t, 1, 2, NULL, i)
 # else
-#  define rwsem_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 1, i)
-#  define rwsem_acquire_read(l, s, t, i)       lock_acquire(l, s, t, 1, 1, i)
+#  define rwsem_acquire(l, s, t, i)            lock_acquire(l, s, t, 0, 1, NULL, i)
+#  define rwsem_acquire_read(l, s, t, i)       lock_acquire(l, s, t, 1, 1, NULL, i)
 # endif
 # define rwsem_release(l, n, i)                        lock_release(l, n, i)
 #else
@@ -452,4 +468,16 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 # define rwsem_release(l, n, i)                        do { } while (0)
 #endif
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# ifdef CONFIG_PROVE_LOCKING
+#  define lock_map_acquire(l)          lock_acquire(l, 0, 0, 0, 2, NULL, _THIS_IP_)
+# else
+#  define lock_map_acquire(l)          lock_acquire(l, 0, 0, 0, 1, NULL, _THIS_IP_)
+# endif
+# define lock_map_release(l)                   lock_release(l, 1, _THIS_IP_)
+#else
+# define lock_map_acquire(l)                   do { } while (0)
+# define lock_map_release(l)                   do { } while (0)
+#endif
+
 #endif /* __LINUX_LOCKDEP_H */