HAT_BUSY
if (SFMMU_FLAGS_ISSET(sfmmup, HAT_BUSY))
SFMMU_FLAGS_SET(sfmmup, HAT_BUSY);
SFMMU_FLAGS_CLEAR(sfmmup, HAT_BUSY);
SFMMU_FLAGS_CLEAR(sfmmup, HAT_BUSY);
SFMMU_FLAGS_CLEAR(sfmmup, HAT_BUSY);
if (hat->sfmmu_flags & (HAT_BUSY | HAT_SWAPPED | HAT_SWAPIN)) {