vfs_rootmountalloc
error = vfs_rootmountalloc(vfsname,
if ((error = vfs_rootmountalloc("devfs", "dummy", &synth_mp))) {
int vfs_rootmountalloc (char *, char *, struct mount **);
if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {