DEFINE_XEN_MMU_PGD_EVENT  377 include/trace/events/xen.h DEFINE_XEN_MMU_PGD_EVENT(xen_mmu_pgd_pin);
DEFINE_XEN_MMU_PGD_EVENT  378 include/trace/events/xen.h DEFINE_XEN_MMU_PGD_EVENT(xen_mmu_pgd_unpin);