include/linux/task_work.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_TASK_WORK_H
   3 #define _LINUX_TASK_WORK_H
   4
   5 #include <linux/list.h>
   6 #include <linux/sched.h>
   7
   8 typedef void (*task_work_func_t)(struct callback_head *);
   9
  10 static inline void
  11 init_task_work(struct callback_head *twork, task_work_func_t func)
  12 {
  13         twork->func = func;
  14 }
  15
  16 enum task_work_notify_mode {
  17         TWA_NONE,
  18         TWA_RESUME,
  19         TWA_SIGNAL,
  20         TWA_SIGNAL_NO_IPI,
  21 };
  22
  23 static inline bool task_work_pending(struct task_struct *task)
  24 {
  25         return READ_ONCE(task->task_works);
  26 }
  27
  28 int task_work_add(struct task_struct *task, struct callback_head *twork,
  29                         enum task_work_notify_mode mode);
  30
  31 struct callback_head *task_work_cancel_match(struct task_struct *task,
  32         bool (*match)(struct callback_head *, void *data), void *data);
  33 struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
  34 void task_work_run(void);
  35
  36 static inline void exit_task_work(struct task_struct *task)
  37 {
  38         task_work_run();
  39 }
  40
  41 #endif  /* _LINUX_TASK_WORK_H */