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 = 0,
  18         TWA_RESUME,
  19         TWA_SIGNAL,
  20         TWA_SIGNAL_NO_IPI,
  21         TWA_NMI_CURRENT,
  22
  23         TWA_FLAGS = 0xff00,
  24         TWAF_NO_ALLOC = 0x0100,
  25 };
  26
  27 static inline bool task_work_pending(struct task_struct *task)
  28 {
  29         return READ_ONCE(task->task_works);
  30 }
  31
  32 int task_work_add(struct task_struct *task, struct callback_head *twork,
  33                         enum task_work_notify_mode mode);
  34
  35 struct callback_head *task_work_cancel_match(struct task_struct *task,
  36         bool (*match)(struct callback_head *, void *data), void *data);
  37 struct callback_head *task_work_cancel_func(struct task_struct *, task_work_func_t);
  38 bool task_work_cancel(struct task_struct *task, struct callback_head *cb);
  39 void task_work_run(void);
  40
  41 static inline void exit_task_work(struct task_struct *task)
  42 {
  43         task_work_run();
  44 }
  45
  46 #endif  /* _LINUX_TASK_WORK_H */