task_work_cancel   17 include/linux/task_work.h struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
task_work_cancel 1104 kernel/irq/manage.c 	task_work_cancel(current, irq_thread_dtor);
task_work_cancel 1684 security/keys/keyctl.c 	oldwork = task_work_cancel(parent, key_change_session_keyring);