128 /* * Each inode has a corresponding vnode. It is a bi-directional * association. Whenever vnode is allocated, its v_data field is * set to the inode it reference, and tmpfs_node_t::tn_vnode is * set to point to the said vnode. * * Further attempts to allocate a vnode for this same node will * result in returning a new reference to the value stored in * tn_vnode. It may be NULL when the node is unused (that is, * no vnode has been allocated or it has been reclaimed). */