int node,
const char namefmt[], ...);
+/**
+ * kthread_create - create a kthread on the current node
+ * @threadfn: the function to run in the thread
+ * @data: data pointer for @threadfn()
+ * @namefmt: printf-style format string for the thread name
+ * @...: arguments for @namefmt.
+ *
+ * This macro will create a kthread on the current node, leaving it in
+ * the stopped state. This is just a helper for kthread_create_on_node();
+ * see the documentation there for more details.
+ */
#define kthread_create(threadfn, data, namefmt, arg...) \
kthread_create_on_node(threadfn, data, NUMA_NO_NODE, namefmt, ##arg)
bool kthread_should_park(void);
bool kthread_freezable_should_stop(bool *was_frozen);
void *kthread_data(struct task_struct *k);
-void *probe_kthread_data(struct task_struct *k);
+void *kthread_probe_data(struct task_struct *k);
int kthread_park(struct task_struct *k);
void kthread_unpark(struct task_struct *k);
void kthread_parkme(void);
* Simple work processor based on kthread.
*
* This provides easier way to make use of kthreads. A kthread_work
- * can be queued and flushed using queue/flush_kthread_work()
+ * can be queued and flushed using queue/kthread_flush_work()
* respectively. Queued kthread_works are processed by a kthread
* running kthread_worker_fn().
*/
struct kthread_work;
typedef void (*kthread_work_func_t)(struct kthread_work *work);
+void kthread_delayed_work_timer_fn(unsigned long __data);
+
+enum {
+ KTW_FREEZABLE = 1 << 0, /* freeze during suspend */
+};
struct kthread_worker {
+ unsigned int flags;
spinlock_t lock;
struct list_head work_list;
+ struct list_head delayed_work_list;
struct task_struct *task;
struct kthread_work *current_work;
};
struct list_head node;
kthread_work_func_t func;
struct kthread_worker *worker;
+ /* Number of canceling calls that are running at the moment. */
+ int canceling;
+};
+
+struct kthread_delayed_work {
+ struct kthread_work work;
+ struct timer_list timer;
};
#define KTHREAD_WORKER_INIT(worker) { \
.lock = __SPIN_LOCK_UNLOCKED((worker).lock), \
.work_list = LIST_HEAD_INIT((worker).work_list), \
+ .delayed_work_list = LIST_HEAD_INIT((worker).delayed_work_list),\
}
#define KTHREAD_WORK_INIT(work, fn) { \
.func = (fn), \
}
+#define KTHREAD_DELAYED_WORK_INIT(dwork, fn) { \
+ .work = KTHREAD_WORK_INIT((dwork).work, (fn)), \
+ .timer = __TIMER_INITIALIZER(kthread_delayed_work_timer_fn, \
+ 0, (unsigned long)&(dwork), \
+ TIMER_IRQSAFE), \
+ }
+
#define DEFINE_KTHREAD_WORKER(worker) \
struct kthread_worker worker = KTHREAD_WORKER_INIT(worker)
#define DEFINE_KTHREAD_WORK(work, fn) \
struct kthread_work work = KTHREAD_WORK_INIT(work, fn)
+#define DEFINE_KTHREAD_DELAYED_WORK(dwork, fn) \
+ struct kthread_delayed_work dwork = \
+ KTHREAD_DELAYED_WORK_INIT(dwork, fn)
+
/*
* kthread_worker.lock needs its own lockdep class key when defined on
* stack with lockdep enabled. Use the following macros in such cases.
*/
#ifdef CONFIG_LOCKDEP
# define KTHREAD_WORKER_INIT_ONSTACK(worker) \
- ({ init_kthread_worker(&worker); worker; })
+ ({ kthread_init_worker(&worker); worker; })
# define DEFINE_KTHREAD_WORKER_ONSTACK(worker) \
struct kthread_worker worker = KTHREAD_WORKER_INIT_ONSTACK(worker)
#else
# define DEFINE_KTHREAD_WORKER_ONSTACK(worker) DEFINE_KTHREAD_WORKER(worker)
#endif
-extern void __init_kthread_worker(struct kthread_worker *worker,
+extern void __kthread_init_worker(struct kthread_worker *worker,
const char *name, struct lock_class_key *key);
-#define init_kthread_worker(worker) \
+#define kthread_init_worker(worker) \
do { \
static struct lock_class_key __key; \
- __init_kthread_worker((worker), "("#worker")->lock", &__key); \
+ __kthread_init_worker((worker), "("#worker")->lock", &__key); \
} while (0)
-#define init_kthread_work(work, fn) \
+#define kthread_init_work(work, fn) \
do { \
memset((work), 0, sizeof(struct kthread_work)); \
INIT_LIST_HEAD(&(work)->node); \
(work)->func = (fn); \
} while (0)
+#define kthread_init_delayed_work(dwork, fn) \
+ do { \
+ kthread_init_work(&(dwork)->work, (fn)); \
+ __setup_timer(&(dwork)->timer, \
+ kthread_delayed_work_timer_fn, \
+ (unsigned long)(dwork), \
+ TIMER_IRQSAFE); \
+ } while (0)
+
int kthread_worker_fn(void *worker_ptr);
-bool queue_kthread_work(struct kthread_worker *worker,
+__printf(2, 3)
+struct kthread_worker *
+kthread_create_worker(unsigned int flags, const char namefmt[], ...);
+
+struct kthread_worker *
+kthread_create_worker_on_cpu(int cpu, unsigned int flags,
+ const char namefmt[], ...);
+
+bool kthread_queue_work(struct kthread_worker *worker,
struct kthread_work *work);
-void flush_kthread_work(struct kthread_work *work);
-void flush_kthread_worker(struct kthread_worker *worker);
+
+bool kthread_queue_delayed_work(struct kthread_worker *worker,
+ struct kthread_delayed_work *dwork,
+ unsigned long delay);
+
+bool kthread_mod_delayed_work(struct kthread_worker *worker,
+ struct kthread_delayed_work *dwork,
+ unsigned long delay);
+
+void kthread_flush_work(struct kthread_work *work);
+void kthread_flush_worker(struct kthread_worker *worker);
+
+bool kthread_cancel_work_sync(struct kthread_work *work);
+bool kthread_cancel_delayed_work_sync(struct kthread_delayed_work *work);
+
+void kthread_destroy_worker(struct kthread_worker *worker);
#endif /* _LINUX_KTHREAD_H */
projects / cascardo / linux.git / blobdiff