pfstype
pfstype pk_type; /* type of procfs node */
procfs_fileno(pid_t _pid, pfstype _type, int _fd)
int procfs_allocvp(struct mount *, struct vnode **, pid_t, pfstype, int);
pfstype type, int fd)
pfstype type;
pfstype parent;
static void procfs_dir(pfstype, struct lwp *, struct proc *, char **, char *,
pfstype pt_pfstype;
procfs_dir(pfstype t, struct lwp *caller, struct proc *target, char **bpp,