making world on 7.2 to update to 8.0-current

when running make buildworld on 7.2 to update to 8.0 current I get the 
fallowing error 

===> usr.bin/kdump (all)
cc -O2 -pipe  -I/usr/src/usr.bin/kdump/../ktrace -I/usr/src/usr.bin/kdump -
I/usr/src/usr.bin/kdump/../.. -std=gnu99 -fstack-protector  -c 
/usr/src/usr.bin/kdump/kdump.c
cc -O2 -pipe  -I/usr/src/usr.bin/kdump/../ktrace -I/usr/src/usr.bin/kdump -
I/usr/src/usr.bin/kdump/../.. -std=gnu99 -fstack-protector  -c ioctl.c
ioctl.c: In function 'ioctlname':
ioctl.c:1089: error: invalid application of 'sizeof' to incomplete type 
'struct vi_req'
ioctl.c:1405: error: invalid application of 'sizeof' to incomplete type 
'struct vi_req'
ioctl.c:2679: error: invalid application of 'sizeof' to incomplete type 
'struct vi_req'
*** Error code 1

Stop in /usr/src/usr.bin/kdump.
*** Error code 1

switch-1# uname -a
FreeBSD switch-1.daemonswitch.com 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Tue May 
12 14:35:01 EDT 2009     
root_at_switch-1.daemonswitch.com:/usr/obj/usr/src/sys/SERVER  i386

Copyright (c) 1992-2009 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 7.2-RELEASE #0: Tue May 12 14:35:01 EDT 2009
    root_at_switch-1.daemonswitch.com:/usr/obj/usr/src/sys/SERVER
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ (2099.96-MHz 686-class 
CPU)
  Origin = "AuthenticAMD"  Id = 0x60fb1  Stepping = 1
  Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
  Features2=0x2001<SSE3,CX16>
  AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>
  AMD Features2=0x11f<LAHF,CMP,SVM,ExtAPIC,CR8,Prefetch>
  Cores per package: 2
real memory  = 518979584 (494 MB)
avail memory = 498069504 (474 MB)
ACPI APIC Table: <VIAK8M AWRDACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1