Something has been missed out of your kernel compile. This kind of error is usually caused by not running
before configuring the kernel; it thinks something's been compiled from before when in fact some options have changed so the version that was built is no longer valid. This is a linker problem, so there's probably nothing wrong with your kernel source.
The safest way to proceed is to copy your .config file to take a backup, run
and then copy your .config file back and run
. This will give you a configured kernel from that needs to be compiled.