Re: KVM userspace build fails with 2.6.28-rc7 kernel installed

[Avi Kivity <avi@redhat.com>]

Todd Deshane wrote:
> On Fri, Dec 5, 2008 at 11:14 AM, Beth Kon <eak@us.ibm.com> wrote:
>   
>> I pulled the latest:
>>  kvm (commit 3c260758b41000986c3c064b17a9771286e98d1e)
>>  kvm-userspace (commit 6892f63c18a526c7b54bbde2f59287787eabe1f8)
>> mtrr_var_range'
>> arch/x86/include/asm/mtrr.h:69: error: redefinition of typedef
>> 'mtrr_type'
>> /home/beth/git/test/kvm-userspace/kernel/x86/external-module-compat.h:349: error: previous declaration of 'mtrr_type' was here
>>     
> I am seeing this exact same error on 2.6.28-rc8
>
>   

In general, the kvm external module won't build on -rc kernels.  This is 
because the external module checks the kernel version to determine what 
features are available, and 2.6.n-rcX will have features from 2.6.n and 
2.6.n-1.

>> When I moved the machine back to 2.6.27.7 the build succeeded.
>>
>>     
>
> I ran across this (or a similar) error recently and just compiling on
> a different kernel seemed to fix it.
>
> Is there something about compiling on a specific kernel that can cause
> a problem?
> I did do re-do a ./configure and also checked with make clean with a
> couple attempts, but keep
> coming back to this error.
>
> Is is something fundamental? compiler problem? user error?
>
> Any suggestions much appreciated.
>   

If you run kvm.git as your kernel, use ./configure --with-patched-kernel 
(or, simply don't build the external module).


-- 
error compiling committee.c: too many arguments to function