DEFINE_XEN_MMU_PGD_EVENT  356 include/trace/events/xen.h DEFINE_XEN_MMU_PGD_EVENT(xen_mmu_pgd_pin);
DEFINE_XEN_MMU_PGD_EVENT  357 include/trace/events/xen.h DEFINE_XEN_MMU_PGD_EVENT(xen_mmu_pgd_unpin);