R4COMMIT
while (rp->r_flags & R4COMMIT) {
rp->r_flags |= R4COMMIT;
rp->r_flags &= ~R4COMMIT;
ASSERT(rp->r_flags & R4COMMIT);
ASSERT(rp->r_flags & R4COMMIT);
while (rp->r_flags & R4COMMIT) {
rp->r_flags |= R4COMMIT;
rp->r_flags &= ~R4COMMIT;