task_work_func_t    8 include/linux/task_work.h typedef void (*task_work_func_t)(struct callback_head *);
task_work_func_t   11 include/linux/task_work.h init_task_work(struct callback_head *twork, task_work_func_t func)
task_work_func_t   17 include/linux/task_work.h struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
task_work_func_t   56 kernel/task_work.c task_work_cancel(struct task_struct *task, task_work_func_t func)