NFS mode on TK1 with Linux 3.10.40

I used this link to build Linux/Uboot for Apalis-Tk1

With this this kernel version 3.10.40, I am not able to boot in NFS mode
We need to use this version to have jetpack support (gpu accelerator)

I have always no root /dev/nfs found error
It seems that the network is not available or pci enum not done in Linux.

This is my uboot env
‘setenv bootargs consoleblank=0 no_console_suspend=1 console=tty1 console=${console},${baudrate}n8 debug_uartport=lsport,0 ip=${ipaddr} root=/dev/nfs rw nfsroot=${serverip}:${nfsroot}root,v3,tcp rw’

I tried BSP 5 and no problem with NFS

Could you please provide a full branch name you are using for your build? Have you enabled NFC at kernel config?

I started from:
repo init -u -b 64928bb263c89f3e445b239467742444988fa49c -m default.xml
And for Linux:
devtool modify virtual/kernel

Of course NFS is enabled in Kernel.
Like I said, It works fine under BSP 5 but I need this version to have accelerated firmware.
It’s really a matter of network, if I install a rootfs in flash and set my envir on it, system boot.
But I have no network.
I checked lot of thing but I cant find the problem with ethernet.

Now I’m confused. You said "I used this link to build Linux/Uboot for Apalis-Tk1" but building just a kernel does not require a repo init. So could you please explain how exactly you built your version of kernel? And please use a verbose branch name as it listed in the mentioned article.