kvm-29 and linux 2.6.22.1-cfs-v19

[Chris Clayton <chris2553-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>]

Hi,

I'm building kvm-29 on a system that is running linux-2.6.22.1-cfs-v19. When 
the modules are built I get warnings about set_64bit:

  CC [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/vmx-debug.o
  CC [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm_main.o
  CC [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/mmu.o
/home/users/chris/rpm/BUILD/kvm-29/kernel/mmu.c: In function 'set_shadow_pte':
/home/users/chris/rpm/BUILD/kvm-29/kernel/mmu.c:202: warning: implicit 
declaration of function 'set_64bit'
  CC [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/x86_emulate.o
  CC [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/anon_inodes.o
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm.o
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-intel.o
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-amd.o
  Building modules, stage 2.
  MODPOST 3 modules
WARNING: "set_64bit" [/home/users/chris/rpm/BUILD/kvm-29/kernel/kvm.ko] 
undefined!
  CC      /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-amd.mod.o
  CC      /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-intel.mod.o
  CC      /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm.mod.o
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-amd.ko
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm-intel.ko
  LD [M]  /home/users/chris/rpm/BUILD/kvm-29/kernel/kvm.ko
m
Because set_64bit is undefined, kvm.ko (and kvm-intel.ko) can't be loaded.

I've found the set_64bit in the kernel sources - it's a macro in 
asm-i386/cmpxchg.h. The problem is that the macro(and some realted macros and 
definitions are guarded by "#ifdef  CONFIG_X86_CMPXCHG64". Since that isn't 
defined for my kernel, set_64bit is not defined either.

If I comment the guarding #ifdef (and its partner #endif) kvm builds fine and 
everything seems to work OK.- the modules load and Damn Small Linux and 
FreeBSD run fine.

Any advice would be much appreciated and more than happy to test patches.

I'm not subscribed, so please cc me.

Thanks

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