ALUA_PG_RUN_STPG
pg->flags |= ALUA_PG_RUN_STPG;
WARN_ON(pg->flags & ALUA_PG_RUN_STPG);
pg->flags &= ~ALUA_PG_RUN_STPG;
if (pg->flags & ALUA_PG_RUN_STPG) {
pg->flags &= ~ALUA_PG_RUN_STPG;