Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

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

diff --git a/include/linux/timer.h b/include/linux/timer.h
index e2d662e3416e38026bbc7385f744481de1b7d0a0..6cdb6f3331f11b6a80d7cd2c85a45706937b16d3 100644 (file)
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -5,6 +5,7 @@
 #include <linux/ktime.h>
 #include <linux/stddef.h>
 #include <linux/debugobjects.h>
+#include <linux/stringify.h>
 
 struct tvec_base;
 
@@ -21,52 +22,126 @@ struct timer_list {
        char start_comm[16];
        int start_pid;
 #endif
+#ifdef CONFIG_LOCKDEP
+       struct lockdep_map lockdep_map;
+#endif
 };
 
 extern struct tvec_base boot_tvec_bases;
 
+#ifdef CONFIG_LOCKDEP
+/*
+ * NB: because we have to copy the lockdep_map, setting the lockdep_map key
+ * (second argument) here is required, otherwise it could be initialised to
+ * the copy of the lockdep_map later! We use the pointer to and the string
+ * "<file>:<line>" as the key resp. the name of the lockdep_map.
+ */
+#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)                           \
+       .lockdep_map = STATIC_LOCKDEP_MAP_INIT(_kn, &_kn),
+#else
+#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
+#endif
+
 #define TIMER_INITIALIZER(_function, _expires, _data) {                \
                .entry = { .prev = TIMER_ENTRY_STATIC },        \
                .function = (_function),                        \
                .expires = (_expires),                          \
                .data = (_data),                                \
                .base = &boot_tvec_bases,                       \
+               __TIMER_LOCKDEP_MAP_INITIALIZER(                \
+                       __FILE__ ":" __stringify(__LINE__))     \
        }
 
 #define DEFINE_TIMER(_name, _function, _expires, _data)                \
        struct timer_list _name =                               \
                TIMER_INITIALIZER(_function, _expires, _data)
 
-void init_timer(struct timer_list *timer);
-void init_timer_deferrable(struct timer_list *timer);
+void init_timer_key(struct timer_list *timer,
+                   const char *name,
+                   struct lock_class_key *key);
+void init_timer_deferrable_key(struct timer_list *timer,
+                              const char *name,
+                              struct lock_class_key *key);
+
+#ifdef CONFIG_LOCKDEP
+#define init_timer(timer)                                              \
+       do {                                                            \
+               static struct lock_class_key __key;                     \
+               init_timer_key((timer), #timer, &__key);                \
+       } while (0)
+
+#define init_timer_deferrable(timer)                                   \
+       do {                                                            \
+               static struct lock_class_key __key;                     \
+               init_timer_deferrable_key((timer), #timer, &__key);     \
+       } while (0)
+
+#define init_timer_on_stack(timer)                                     \
+       do {                                                            \
+               static struct lock_class_key __key;                     \
+               init_timer_on_stack_key((timer), #timer, &__key);       \
+       } while (0)
+
+#define setup_timer(timer, fn, data)                                   \
+       do {                                                            \
+               static struct lock_class_key __key;                     \
+               setup_timer_key((timer), #timer, &__key, (fn), (data));\
+       } while (0)
+
+#define setup_timer_on_stack(timer, fn, data)                          \
+       do {                                                            \
+               static struct lock_class_key __key;                     \
+               setup_timer_on_stack_key((timer), #timer, &__key,       \
+                                        (fn), (data));                 \
+       } while (0)
+#else
+#define init_timer(timer)\
+       init_timer_key((timer), NULL, NULL)
+#define init_timer_deferrable(timer)\
+       init_timer_deferrable_key((timer), NULL, NULL)
+#define init_timer_on_stack(timer)\
+       init_timer_on_stack_key((timer), NULL, NULL)
+#define setup_timer(timer, fn, data)\
+       setup_timer_key((timer), NULL, NULL, (fn), (data))
+#define setup_timer_on_stack(timer, fn, data)\
+       setup_timer_on_stack_key((timer), NULL, NULL, (fn), (data))
+#endif
 
 #ifdef CONFIG_DEBUG_OBJECTS_TIMERS
-extern void init_timer_on_stack(struct timer_list *timer);
+extern void init_timer_on_stack_key(struct timer_list *timer,
+                                   const char *name,
+                                   struct lock_class_key *key);
 extern void destroy_timer_on_stack(struct timer_list *timer);
 #else
 static inline void destroy_timer_on_stack(struct timer_list *timer) { }
-static inline void init_timer_on_stack(struct timer_list *timer)
+static inline void init_timer_on_stack_key(struct timer_list *timer,
+                                          const char *name,
+                                          struct lock_class_key *key)
 {
-       init_timer(timer);
+       init_timer_key(timer, name, key);
 }
 #endif
 
-static inline void setup_timer(struct timer_list * timer,
+static inline void setup_timer_key(struct timer_list * timer,
+                               const char *name,
+                               struct lock_class_key *key,
                                void (*function)(unsigned long),
                                unsigned long data)
 {
        timer->function = function;
        timer->data = data;
-       init_timer(timer);
+       init_timer_key(timer, name, key);
 }
 
-static inline void setup_timer_on_stack(struct timer_list *timer,
+static inline void setup_timer_on_stack_key(struct timer_list *timer,
+                                       const char *name,
+                                       struct lock_class_key *key,
                                        void (*function)(unsigned long),
                                        unsigned long data)
 {
        timer->function = function;
        timer->data = data;
-       init_timer_on_stack(timer);
+       init_timer_on_stack_key(timer, name, key);
 }
 
 /**