R4MODINPROGRESS
ASSERT(!(rp->r_flags & R4MODINPROGRESS));
rp->r_flags |= R4MODINPROGRESS;
rp->r_flags &= ~R4MODINPROGRESS;
if (rp->r_flags & R4MODINPROGRESS) {
if ((rp->r_flags & R4MODINPROGRESS) &&