workqueue: Add debugobjects support
Add debugobject support to track the life time of work_structs.
While at it, remove duplicate definition of
INIT_DELAYED_WORK_ON_STACK().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index cf24c20..9466e86 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -25,6 +25,7 @@
struct work_struct {
atomic_long_t data;
#define WORK_STRUCT_PENDING 0 /* T if work item pending execution */
+#define WORK_STRUCT_STATIC 1 /* static initializer (debugobjects) */
#define WORK_STRUCT_FLAG_MASK (3UL)
#define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK)
struct list_head entry;
@@ -35,6 +36,7 @@
};
#define WORK_DATA_INIT() ATOMIC_LONG_INIT(0)
+#define WORK_DATA_STATIC_INIT() ATOMIC_LONG_INIT(2)
struct delayed_work {
struct work_struct work;
@@ -63,7 +65,7 @@
#endif
#define __WORK_INITIALIZER(n, f) { \
- .data = WORK_DATA_INIT(), \
+ .data = WORK_DATA_STATIC_INIT(), \
.entry = { &(n).entry, &(n).entry }, \
.func = (f), \
__WORK_INIT_LOCKDEP_MAP(#n, &(n)) \
@@ -91,6 +93,14 @@
#define PREPARE_DELAYED_WORK(_work, _func) \
PREPARE_WORK(&(_work)->work, (_func))
+#ifdef CONFIG_DEBUG_OBJECTS_WORK
+extern void __init_work(struct work_struct *work, int onstack);
+extern void destroy_work_on_stack(struct work_struct *work);
+#else
+static inline void __init_work(struct work_struct *work, int onstack) { }
+static inline void destroy_work_on_stack(struct work_struct *work) { }
+#endif
+
/*
* initialize all of a work item in one go
*
@@ -99,24 +109,36 @@
* to generate better code.
*/
#ifdef CONFIG_LOCKDEP
-#define INIT_WORK(_work, _func) \
+#define __INIT_WORK(_work, _func, _onstack) \
do { \
static struct lock_class_key __key; \
\
+ __init_work((_work), _onstack); \
(_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\
INIT_LIST_HEAD(&(_work)->entry); \
PREPARE_WORK((_work), (_func)); \
} while (0)
#else
-#define INIT_WORK(_work, _func) \
+#define __INIT_WORK(_work, _func, _onstack) \
do { \
+ __init_work((_work), _onstack); \
(_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
INIT_LIST_HEAD(&(_work)->entry); \
PREPARE_WORK((_work), (_func)); \
} while (0)
#endif
+#define INIT_WORK(_work, _func) \
+ do { \
+ __INIT_WORK((_work), (_func), 0); \
+ } while (0)
+
+#define INIT_WORK_ON_STACK(_work, _func) \
+ do { \
+ __INIT_WORK((_work), (_func), 1); \
+ } while (0)
+
#define INIT_DELAYED_WORK(_work, _func) \
do { \
INIT_WORK(&(_work)->work, (_func)); \
@@ -125,22 +147,16 @@
#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \
do { \
- INIT_WORK(&(_work)->work, (_func)); \
+ INIT_WORK_ON_STACK(&(_work)->work, (_func)); \
init_timer_on_stack(&(_work)->timer); \
} while (0)
-#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \
+#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \
do { \
INIT_WORK(&(_work)->work, (_func)); \
init_timer_deferrable(&(_work)->timer); \
} while (0)
-#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \
- do { \
- INIT_WORK(&(_work)->work, (_func)); \
- init_timer_on_stack(&(_work)->timer); \
- } while (0)
-
/**
* work_pending - Find out whether a work item is currently pending
* @work: The work item in question