[Xen-devel] Compile pvops kernel xen/stable-2.6.32.x error

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

Hi,

I pulled from git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
and do the following:

git checkout -b xen/stable-2.6.32.x --track origin/xen/stable-2.6.32.x
git pull

git log showing the latest commit as below:

commit d0054d672ff0ebf6116cee27bae3fc2591c726af
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Date:   Mon Oct 25 16:53:46 2010 -0700

    x86/pvclock: zero last_value on resume

    If the guest domain has been suspend/resumed or migrated, then the
    system clock backing the pvclock clocksource may revert to a smaller
    value (ie, can be non-monotonic across the migration/save-restore).
    Make sure we zero last_value in that case so that the domain
    continues to see clock updates.

    Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
    (cherry picked from commit 29acbb4e1d93e719250648db1ce8c7a24144fd86)


I am using gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-48) in CentOS5.

Anyone encountered the below warnings & errors?

-----SNAP-----
arch/x86/kernel/smpboot.c:99: warning: function declaration isn’t a prototype
arch/x86/kernel/smpboot.c:104: warning: function declaration isn’t a prototype
-----SNAP-----
arch/x86/xen/enlighten.c: In function ‘xen_init_cpuid_mask’:
arch/x86/xen/enlighten.c:242: warning: unused variable ‘dx’
arch/x86/xen/enlighten.c:242: warning: unused variable ‘cx’
arch/x86/xen/enlighten.c:242: warning: unused variable ‘bx’
arch/x86/xen/enlighten.c:242: warning: unused variable ‘ax’
  CC      arch/x86/xen/setup.o - due to target missing
  CC      arch/x86/xen/multicalls.o - due to target missing
  CC      arch/x86/xen/mmu.o - due to target missing
arch/x86/xen/mmu.c:163: error: __pcpu_scope_xen_cr3 causes a section
type conflict
arch/x86/xen/mmu.c:164: error: __pcpu_scope_xen_current_cr3 causes a
section type conflict
arch/x86/xen/mmu.c:163: error: __pcpu_unique_xen_cr3 causes a section
type conflict
arch/x86/xen/mmu.c:164: error: __pcpu_unique_xen_current_cr3 causes a
section type conflict
make[2]: *** [arch/x86/xen/mmu.o] Error 1
make[1]: *** [arch/x86/xen] Error 2
make: *** [arch/x86] Error 2
-----SNAP-----

The errors in arch/x86/xen/mmu.c line 163 and 164 are:

/*
 * Note about cr3 (pagetable base) values:
 *
 * xen_cr3 contains the current logical cr3 value; it contains the
 * last set cr3.  This may not be the current effective cr3, because
 * its update may be being lazily deferred.  However, a vcpu looking
 * at its own cr3 can use this value knowing that it everything will
 * be self-consistent.
 *
 * xen_current_cr3 contains the actual vcpu cr3; it is set once the
 * hypercall to set the vcpu cr3 is complete (so it may be a little
 * out of date, but it will never be set early).  If one vcpu is
 * looking at another vcpu's cr3 value, it should use this variable.
 */
DEFINE_PER_CPU(unsigned long, xen_cr3);  /* cr3 stored as physaddr */
DEFINE_PER_CPU(unsigned long, xen_current_cr3);  /* actual vcpu cr3 */

Any idea to rectify?  If my .config is required, I can post it.

Thanks.

Kindest regards,
Giam Teck Choon

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