324 	struct tstamp_data *pelem;  in get_tstamp_elem()  local
330 		pelem = bpf_map_lookup_elem(&tstamp_cpu, &idx);  in get_tstamp_elem()
332 		if (pelem && pelem->lock)  in get_tstamp_elem()
333 			pelem = NULL;  in get_tstamp_elem()
334 		return pelem;  in get_tstamp_elem()
338 	pelem = bpf_map_lookup_elem(&tstamp, &pid);  in get_tstamp_elem()
340 	if (pelem && pelem->lock)  in get_tstamp_elem()
343 	if (pelem == NULL) {  in get_tstamp_elem()
351 		pelem = bpf_map_lookup_elem(&tstamp, &pid);  in get_tstamp_elem()
352 		if (pelem == NULL) {  in get_tstamp_elem()
357 	return pelem;  in get_tstamp_elem()
363 	struct tstamp_data *pelem;  in contention_begin()  local
368 	pelem = get_tstamp_elem(ctx[1]);  in contention_begin()
369 	if (pelem == NULL)  in contention_begin()
372 	pelem->timestamp = bpf_ktime_get_ns();  in contention_begin()
373 	pelem->lock = (__u64)ctx[0];  in contention_begin()
374 	pelem->flags = (__u32)ctx[1];  in contention_begin()
377 		pelem->stack_id = bpf_get_stackid(ctx, &stacks,  in contention_begin()
379 		if (pelem->stack_id < 0)  in contention_begin()
385 			task = get_lock_owner(pelem->lock, pelem->flags);  in contention_begin()
389 				pelem->flags = BPF_CORE_READ(task, pid);  in contention_begin()
391 				pelem->flags = -1U;  in contention_begin()
399 				pelem->flags = -1U;  in contention_begin()
410 	struct tstamp_data *pelem;  in contention_end()  local
428 	pelem = bpf_map_lookup_elem(&tstamp_cpu, &idx);  in contention_end()
429 	if (pelem && pelem->lock) {  in contention_end()
430 		if (pelem->lock != ctx[0])  in contention_end()
434 		pelem = bpf_map_lookup_elem(&tstamp, &pid);  in contention_end()
435 		if (!pelem || pelem->lock != ctx[0])  in contention_end()
440 	duration = bpf_ktime_get_ns() - pelem->timestamp;  in contention_end()
448 		key.stack_id = pelem->stack_id;  in contention_end()
452 			key.pid = pelem->flags;  in contention_end()
459 			key.stack_id = pelem->stack_id;  in contention_end()
462 		key.lock_addr_or_cgroup = pelem->lock;  in contention_end()
464 			key.stack_id = pelem->stack_id;  in contention_end()
486 			.flags = pelem->flags,  in contention_end()
491 			first.flags |= check_lock_type(pelem->lock, pelem->flags);  in contention_end()
519 	pelem->lock = 0;  in contention_end()