xen/pci: Fix compiler error when CONFIG_XEN_PRIVILEGED_GUEST is not set.
If we have CONFIG_XEN and the other parameters to build an Linux kernel that is non-privileged, the xen_[find|register|unregister]_ device_domain_owner functions should not be compiled. They should use the nops defined in arch/x86/include/asm/xen/pci.h instead. This fixes: arch/x86/pci/xen.c:496: error: redefinition of ‘xen_find_device_domain_owner’ arch/x86/include/asm/xen/pci.h:25: note: previous definition of ‘xen_find_device_domain_owner’ was here arch/x86/pci/xen.c:510: error: redefinition of ‘xen_register_device_domain_owner’ arch/x86/include/asm/xen/pci.h:29: note: previous definition of ‘xen_register_device_domain_owner’ was here arch/x86/pci/xen.c:532: error: redefinition of ‘xen_unregister_device_domain_owner’ arch/x86/include/asm/xen/pci.h:34: note: previous definition of ‘xen_unregister_device_domain_owner’ was here Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reported-by: NRandy Dunlap <randy.dunlap@oracle.com>
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