VirtIO configure and compilation problems

[Cam Macdonell <cam-edFDblaTWIyXbbII50Afww@public.gmane.org>]

Hi Dor,

I was able to grab the virtio sources.  However, the make -C kernel 
command to build the modules doesn't copy over all files.

when I run:

make -C kernel sync LINUX=/home/cam/research/KVM/dor/kvm/

the following files:
linux/virtio.h
linux/virtio_blk.h
linux/virtio_net.h
asm-x86_64/hypercall.h

don't get copied into kvm-userspace/kernel/include

after copying them manually, I get the compile to move forward until 
this happens:

   CC [M]  /home/cam/research/KVM/dor/kvm-userspace/kernel/virtio_backend.o
KVM/dor/kvm-userspace/kernel/virtio_backend.c: In function 'virtio_add_buf':
KVM/dor/kvm-userspace/kernel/virtio_backend.c:104: warning: parameter 
names (without types) in function declaration
KVM/dor/kvm-userspace/kernel/virtio_backend.c:131: error: 'prev' 
undeclared (first use in this function)
KVM/dor/kvm-userspace/kernel/virtio_backend.c:131: error: (Each 
undeclared identifier is reported only once
KVM/dor/kvm-userspace/kernel/virtio_backend.c:131: error: for each 
function it appears in.)
make[3]: *** [KVM/dor/kvm-userspace/kernel/virtio_backend.o] Error 1

Hopefully I'll get to a point when I can fix these myself, but I'm not 
there yet :)

Thanks,
Cam

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