xen_failsafe_callback 997 arch/x86/xen/setup.c register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback)) xen_failsafe_callback 352 arch/x86/xen/smp_pv.c (unsigned long)xen_failsafe_callback; xen_failsafe_callback 12 arch/x86/xen/xen-ops.h extern const char xen_failsafe_callback[];