GC_USER_RB_BACKEND_DISABLE__BACKEND_DISABLE__SHIFT
data >>= GC_USER_RB_BACKEND_DISABLE__BACKEND_DISABLE__SHIFT;
data >>= GC_USER_RB_BACKEND_DISABLE__BACKEND_DISABLE__SHIFT;
data >>= GC_USER_RB_BACKEND_DISABLE__BACKEND_DISABLE__SHIFT;