Can not upgrade to 6.0R from 5.4-STABLE

[Boris Kovalenko]

Hello!

	I try to do src upgrade from 5.4S to 6.0R. After the make clean; make 
into /usr/src I getting next error:
cc -O -pipe -march=pentiumpro -DLIBC_SCCS -I/usr/src/lib/libkvm  -c 
/usr/src/lib/libkvm/kvm_proc.c
/usr/src/lib/libkvm/kvm_proc.c: In function `kvm_proclist':
/usr/src/lib/libkvm/kvm_proc.c:108: error: storage size of 't_cdev' 
isn't known
/usr/src/lib/libkvm/kvm_proc.c:114: error: storage size of 'pr' isn't known
/usr/src/lib/libkvm/kvm_proc.c:176: error: structure has no member named 
`ki_jid'
/usr/src/lib/libkvm/kvm_proc.c:377: error: structure has no member named 
`p_rux'
*** Error code 1

What's wrong?

-- 
With respect,
	Boris