154 	struct unwind_work *work;  in process_unwind_deferred()  local
179 	list_for_each_entry_srcu(work, &callbacks, list,  in process_unwind_deferred()
181 		if (test_bit(work->bit, &bits)) {  in process_unwind_deferred()
182 			work->func(work, &trace, cookie);  in process_unwind_deferred()
184 				info->cache->unwind_completed |= BIT(work->bit);  in process_unwind_deferred()
203 	task_work_cancel(task, &info->work);  in unwind_deferred_task_exit()
208  * @work: Unwind descriptor requesting the trace
211  * Schedule a user space unwind to be done in task work before exiting the
220  * It's valid to call this function multiple times for the same @work within
231 int unwind_deferred_request(struct unwind_work *work, u64 *cookie)  in unwind_deferred_request()  argument
253 	bit = READ_ONCE(work->bit);  in unwind_deferred_request()
271 	 * This work's bit hasn't been set yet. Now set it with the PENDING  in unwind_deferred_request()
273 	 * work's bit or PENDING was already set, then this is already queued  in unwind_deferred_request()
280 		 * If the work's bit was set, whatever set it had better  in unwind_deferred_request()
287 	/* The work has been claimed, now schedule it. */  in unwind_deferred_request()
288 	ret = task_work_add(current, &info->work, TWA_RESUME);  in unwind_deferred_request()
296 void unwind_deferred_cancel(struct unwind_work *work)  in unwind_deferred_cancel()  argument
301 	if (!work)  in unwind_deferred_cancel()
304 	bit = work->bit;  in unwind_deferred_cancel()
306 	/* No work should be using a reserved bit */  in unwind_deferred_cancel()
311 	list_del_rcu(&work->list);  in unwind_deferred_cancel()
314 	work->bit = -1;  in unwind_deferred_cancel()
329 int unwind_deferred_init(struct unwind_work *work, unwind_callback_t func)  in unwind_deferred_init()  argument
331 	memset(work, 0, sizeof(*work));  in unwind_deferred_init()
339 	work->bit = ffz(unwind_mask);  in unwind_deferred_init()
340 	__set_bit(work->bit, &unwind_mask);  in unwind_deferred_init()
342 	list_add_rcu(&work->list, &callbacks);  in unwind_deferred_init()
343 	work->func = func;  in unwind_deferred_init()
352 	init_task_work(&info->work, unwind_deferred_task_work);  in unwind_task_init()
361 	task_work_cancel(task, &info->work);  in unwind_task_free()