Compile linux-2.6.30.3 problem

In ubuntu13 compiled linux problems

 CHK     include/linux/version.h
   CHK     include/linux/utsrelease.h
   SYMLINK include/asm -> include/asm-x86
   CALL    scripts/checksyscalls.sh
   CHK     include/linux/compile.h
   AS      arch/x86/kernel/entry_64.o
 /tmp/cc3AKMAB.s: Assembler messages:
 /tmp/cc3AKMAB.s: Error: .size expression for do_hypervisor_callback does not evaluate to a constant
 make[1]: *** [arch/x86/kernel/entry_64.o] Error 1
 make: *** [arch/x86/kernel] Error 2
 

just getting started with linux, solve ah. . .
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follow the tutorial above should be no problem out , I am also a novice, Bangding
http://hi.baidu.com/690609237/item/381db1d600fe4fe055347f3a
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next newest 3.10 or 3.9 to compile the kernel to try to see if there are any problems , I see you're using u13
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32位loom installed 64-bit system , right ?
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not ah now cpu support 64 a
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is compiled so what ,
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get modified do_hypervisor_callback, do not know what reason , do not source which has an error. . .
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how to modify the do_hypervisor_callback, encountered the same problem.
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open entry_64.s file, find do_hypervisor_callback entrance. The entrance xen_do_hypervisor_callback to do_hypervisor_callback to compile.
I do not know why the source added xen_ head .