MDPG_ATTR_SP
(sp->md.mdpg_attrs & (ptebit | MDPG_ATTR_SP)) ==
(ptebit | MDPG_ATTR_SP)))
atomic_set_32(&m->md.mdpg_attrs, sp_refchg | MDPG_ATTR_SP);
atomic_clear_32(&m->md.mdpg_attrs, MDPG_ATTR_SP);
MDPG_ATTR_SP);
atomic_set_32(&m->md.mdpg_attrs, refchg | MDPG_ATTR_SP);