procfs_domem
error = procfs_domem(curp, lp, NULL, &uio);
error = procfs_domem(curp, lp, NULL, &uio);
int procfs_domem (struct proc *, struct lwp *, struct pfsnode *pfsp, struct uio *uio);
rtval = procfs_domem(curp, lp, pfs, uio);