klist_node_attached() -- 检测klist_node是否为空

driver_bound() --> klist_node_attached()

linux-2.6.21.5/lib/klist.c

klist_node不为空则返回真，否则返回假
/**
* klist_node_attached - Say whether a node is bound to a list or not.
* @n: Node that we're testing.
*/

int klist_node_attached(struct klist_node * n)
{
return (n->n_klist != NULL);
}