armsys2410 nfs 方式 mount主机

用两种方法都没有成功，下面是错误提示信息，希望高手提点
（1）
[root@lyt /]# mount -t nfs -onolock 192.168.253.1:/home/nfs /usr/nfs
nfs warning: mount version newer than kernel
NFS: mount program didn't pass remote address!
mount: Mounting 192.168.253.1:/home/nfs on /usr/nfs failed: Invalid argument
（2）
Looking up port of RPC 100003/2 on 192.168.253.1
Looking up port of RPC 100005/1 on 192.168.253.1
Root-NFS: Server returned error -13 while mounting /armsys2410/root
VFS: Unable to mount root fs via NFS, trying floppy.
request_module[block-major-2]: Root fs not mounted
VFS: Cannot open root device "nfs" or 02:00
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 02:00

busybox编译时对应的kernel版本可能不对。