R4PGFLUSH
((rp->r_flags & R4PGFLUSH) && rp->r_pgflush != curthread)) {
((rp->r_flags & R4PGFLUSH) &&
if (rp->r_flags & R4PGFLUSH) {
rp->r_flags |= R4PGFLUSH;
rp->r_flags &= ~R4PGFLUSH;
if ((rp->r_flags & R4PGFLUSH) && rp->r_pgflush != curthread) {