FR_WAITING
__set_bit(FR_WAITING, &req->flags);
if (test_bit(FR_WAITING, &req->flags)) {
__clear_bit(FR_WAITING, &req->flags);
__set_bit(FR_WAITING, &req->flags);
if (!test_bit(FR_WAITING, &req->flags)) {
__set_bit(FR_WAITING, &req->flags);