if ((error = procfs_checkioperm(curp, p)) != 0) return (error);
procfs_domem(curp, p, pfs, uio)	struct proc *curp;	struct proc *p;	struct pfsnode *pfs;	struct uio *uio;{	if (uio->uio_resid == 0)		return (0);	return (procfs_rwmem(p, uio));}