static struct binder_transaction_log_entry *binder_transaction_log_add(
	struct binder_transaction_log *log)
{
	struct binder_transaction_log_entry *e;
	unsigned int cur = atomic_inc_return(&log->cur);

	if (cur >= ARRAY_SIZE(log->entry))
		log->full = true;
	e = &log->entry[cur % ARRAY_SIZE(log->entry)];
	WRITE_ONCE(e->debug_id_done, 0);
	/*
	 * write-barrier to synchronize access to e->debug_id_done.
	 * We make sure the initialized 0 value is seen before
	 * memset() other fields are zeroed by memset.
	 */
	smp_wmb();
	memset(e, 0, sizeof(*e));
	return e;
}
Unknown