xen源码安装时内核编译出错

[hloscar]

mm/built-in.o: In function `memmap_init_zone':
(.init.text+0x911): undefined reference to `early_pfn_in_nid'
make[6]: *** [.tmp_vmlinux1] 错误 1
make[5]: *** [vmlinuz] 错误 2
make[4]: *** [vmlinuz] 错误 2
make[4]: Leaving directory `/usr/local/xen/xen-3.1.3/build-linux-2.6.18.8-xen_x86_64'
make[3]: *** [build] 错误 2
make[3]: Leaving directory `/usr/local/xen/xen-3.1.3'
make[2]: *** [linux-2.6-xen-install] 错误 2
make[2]: Leaving directory `/usr/local/xen/xen-3.1.3'
make[1]: *** [install-kernels] 错误 1
make[1]: Leaving directory `/usr/local/xen/xen-3.1.3'
make: *** [world] 错误 2

想启用xen的sHype模块，需要对xen进行源码编译安装。出现了上面的错误，求高手大虾指点！

[yandong]

你这还是xen3.1的啊

[hloscar]

没有人遇到过吗？