 @@ -1,320 +1,330 @@
-/*	$NetBSD: kern_stub.c,v 1.47 2019/01/27 02:55:26 christos Exp $	*/
+/*	$NetBSD: kern_stub.c,v 1.48 2019/10/08 07:33:15 mrg Exp $	*/
 /*-
  * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*
  * Copyright (c) 1982, 1986, 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
  *	@(#)subr_xxx.c	8.3 (Berkeley) 3/29/95
  */
 /*
  * Stubs for system calls and facilities not included in the system.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.47 2019/01/27 02:55:26 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.48 2019/10/08 07:33:15 mrg Exp $");
 #ifdef _KERNEL_OPT
 #include "opt_ktrace.h"
 #include "opt_sysv.h"
 #include "opt_modular.h"
 #endif
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/proc.h>
 #include <sys/fstypes.h>
 #include <sys/signalvar.h>
 #include <sys/syscall.h>
 #include <sys/ktrace.h>
 #include <sys/intr.h>
 #include <sys/cpu.h>
 #include <sys/module.h>
 #include <sys/bus.h>
 #include <sys/userconf.h>
 bool default_bus_space_is_equal(bus_space_tag_t, bus_space_tag_t);
 bool default_bus_space_handle_is_equal(bus_space_tag_t, bus_space_handle_t,
     bus_space_handle_t);
 /*
  * SYSV Semaphores, Shared Memory, Message Queues
  */
 #ifndef MODULAR
 #ifndef SYSVMSG
 __strong_alias(msgctl1,enosys);
 #endif
 #ifndef SYSVSHM
 __strong_alias(shmctl1,enosys);
 #endif
 #ifndef SYSVSEM
  __strong_alias(semctl1,enosys);
 #endif
 #endif
 /*
  * ktrace stubs.  ktruser() goes to enosys as we want to fail the syscall,
  * but not kill the process: utrace() is a debugging feature.
  */
 #ifndef KTRACE
 __strong_alias(ktr_csw,nullop);		/* Probes */
 __strong_alias(ktr_emul,nullop);
 __strong_alias(ktr_geniov,nullop);
 __strong_alias(ktr_genio,nullop);
 __strong_alias(ktr_mibio,nullop);
 __strong_alias(ktr_namei,nullop);
 __strong_alias(ktr_namei2,nullop);
 __strong_alias(ktr_psig,nullop);
 __strong_alias(ktr_syscall,nullop);
 __strong_alias(ktr_sysret,nullop);
 __strong_alias(ktr_kuser,nullop);
 __strong_alias(ktr_mib,nullop);
 __strong_alias(ktr_execarg,nullop);
 __strong_alias(ktr_execenv,nullop);
 __strong_alias(ktr_execfd,nullop);
 __strong_alias(sys_fktrace,sys_nosys);	/* Syscalls */
 __strong_alias(sys_ktrace,sys_nosys);
 __strong_alias(sys_utrace,sys_nosys);
 int	ktrace_on;			/* Misc */
 __strong_alias(ktruser,enosys);
 __strong_alias(ktr_point,nullop);
 #endif	/* KTRACE */
 __weak_alias(device_register, voidop);
 __weak_alias(device_register_post_config, voidop);
 __weak_alias(spldebug_start, voidop);
 __weak_alias(spldebug_stop, voidop);
 __weak_alias(machdep_init,nullop);
 __weak_alias(pci_chipset_tag_create, eopnotsupp);
 __weak_alias(pci_chipset_tag_destroy, voidop);
 __weak_alias(bus_space_reserve, eopnotsupp);
 __weak_alias(bus_space_reserve_subregion, eopnotsupp);
 __weak_alias(bus_space_release, voidop);
 __weak_alias(bus_space_reservation_map, eopnotsupp);
 __weak_alias(bus_space_reservation_unmap, voidop);
 __weak_alias(bus_dma_tag_create, eopnotsupp);
 __weak_alias(bus_dma_tag_destroy, voidop);
 __weak_alias(bus_space_tag_create, eopnotsupp);
 __weak_alias(bus_space_tag_destroy, voidop);
 __strict_weak_alias(bus_space_is_equal, default_bus_space_is_equal);
 __strict_weak_alias(bus_space_handle_is_equal,
     default_bus_space_handle_is_equal);
 __weak_alias(userconf_bootinfo, voidop);
 __weak_alias(userconf_init, voidop);
 __weak_alias(userconf_prompt, voidop);
 __weak_alias(kobj_renamespace, nullop);
 __weak_alias(interrupt_get_count, nullop);
 __weak_alias(interrupt_get_assigned, voidop);
 __weak_alias(interrupt_get_available, voidop);
 __weak_alias(interrupt_get_devname, voidop);
 __weak_alias(interrupt_construct_intrids, nullret);
 __weak_alias(interrupt_destruct_intrids, voidop);
 __weak_alias(interrupt_distribute, eopnotsupp);
 __weak_alias(interrupt_distribute_handler, eopnotsupp);
 /*
  * Scheduler activations system calls.  These need to remain until libc's
  * major version is bumped.
  */
 __strong_alias(sys_sa_register,sys_nosys);
 __strong_alias(sys_sa_stacks,sys_nosys);
 __strong_alias(sys_sa_enable,sys_nosys);
 __strong_alias(sys_sa_setconcurrency,sys_nosys);
 __strong_alias(sys_sa_yield,sys_nosys);
 __strong_alias(sys_sa_preempt,sys_nosys);
 __strong_alias(sys_sa_unblockyield,sys_nosys);
 /*
  * Stubs for compat_netbsd32.
  */
 __strong_alias(dosa_register,sys_nosys);
 __strong_alias(sa_stacks1,sys_nosys);
 /*
  * Stubs for drivers.  See sys/conf.h.
  */
 __strong_alias(devenodev,enodev);
 __strong_alias(deveopnotsupp,eopnotsupp);
 __strong_alias(devnullop,nullop);
 __strong_alias(ttyenodev,enodev);
 __strong_alias(ttyvenodev,voidop);
 __strong_alias(ttyvnullop,nullop);
 /*
  * Stubs for architectures that do not support kernel preemption.
  */
 #ifndef __HAVE_PREEMPTION
 bool
 cpu_kpreempt_enter(uintptr_t where, int s)
+{
 	return false;
+}
 void
 cpu_kpreempt_exit(uintptr_t where)
+{
+}
 bool
 cpu_kpreempt_disabled(void)
+{
 	return true;
+}
 #else
 # ifndef MULTIPROCESSOR
 #   error __HAVE_PREEMPTION requires MULTIPROCESSOR
 # endif
 #endif	/* !__HAVE_PREEMPTION */
 int
 sys_nosys(struct lwp *l, const void *v, register_t *retval)
+{
 	mutex_enter(proc_lock);
 	psignal(l->l_proc, SIGSYS);
 	mutex_exit(proc_lock);
 	return ENOSYS;
+}
 /*
  * Unsupported device function (e.g. writing to read-only device).
  */
 int
 enodev(void)
+{
 	return (ENODEV);
+}
 /*
  * Unconfigured device function; driver not configured.
  */
 int
 enxio(void)
+{
 	return (ENXIO);
+}
 /*
  * Unsupported ioctl function.
  */
 int
 enoioctl(void)
+{
 	return (ENOTTY);
+}
 /*
  * Unsupported system function.
  * This is used for an otherwise-reasonable operation
  * that is not supported by the current system binary.
  */
 int
 enosys(void)
+{
 	return (ENOSYS);
+}
 /*
  * Return error for operation not supported
  * on a specific object or file type.
  */
 int
 eopnotsupp(void)
+{
 	return (EOPNOTSUPP);
+}
 /*
  * Generic null operation, void return value.
  */
 void
 voidop(void)
+{
+}
 /*
  * Generic null operation, always returns success.
  */
 int
 nullop(void *v)
+{
 	return (0);
+}
 /*
  * Generic null operation, always returns null.
  */
 void *
 nullret(void)
+{
 	return (NULL);
+}
 bool
 default_bus_space_handle_is_equal(bus_space_tag_t t,
     bus_space_handle_t h1, bus_space_handle_t h2)
+{
 	return memcmp(&h1, &h2, sizeof(h1)) == 0;
+}
 bool
 default_bus_space_is_equal(bus_space_tag_t t1, bus_space_tag_t t2)
+{
 	return memcmp(&t1, &t2, sizeof(t1)) == 0;
+}

 @@ -1,282 +1,289 @@
-/*	$NetBSD: conf.h,v 1.152 2019/10/08 07:16:25 mrg Exp $	*/
+/*	$NetBSD: conf.h,v 1.153 2019/10/08 07:33:14 mrg Exp $	*/
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  * (c) UNIX System Laboratories, Inc.
  * All or some portions of this file are derived from material licensed
  * to the University of California by American Telephone and Telegraph
  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  * the permission of UNIX System Laboratories, Inc.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
+ *
  *	@(#)conf.h	8.5 (Berkeley) 1/9/95
  */
 #ifndef _SYS_CONF_H_
 #define _SYS_CONF_H_
 /*
  * Definitions of device driver entry switches
  */
 #include <sys/queue.h>
 #include <sys/device_if.h>
 struct buf;
 struct knote;
 struct lwp;
 struct tty;
 struct uio;
 struct vnode;
 /*
  * Types for d_flag
  */
 #define D_OTHER		0x0000
 #define	D_TAPE		0x0001
 #define	D_DISK		0x0002
 #define	D_TTY		0x0003
 #define	D_TYPEMASK	0x00ff
 #define	D_MPSAFE	0x0100
 #define	D_NEGOFFSAFE	0x0200
 #define	D_MCLOSE	0x0400
 /*
  * Block device switch table
  */
 struct bdevsw {
 	int		(*d_open)(dev_t, int, int, struct lwp *);
 	int		(*d_close)(dev_t, int, int, struct lwp *);
 	void		(*d_strategy)(struct buf *);
 	int		(*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
 	int		(*d_dump)(dev_t, daddr_t, void *, size_t);
 	int		(*d_psize)(dev_t);
 	int		(*d_discard)(dev_t, off_t, off_t);
 	int		d_flag;
 };
 /*
  * Character device switch table
  */
 struct cdevsw {
 	int		(*d_open)(dev_t, int, int, struct lwp *);
 	int		(*d_close)(dev_t, int, int, struct lwp *);
 	int		(*d_read)(dev_t, struct uio *, int);
 	int		(*d_write)(dev_t, struct uio *, int);
 	int		(*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
 	void		(*d_stop)(struct tty *, int);
 	struct tty *	(*d_tty)(dev_t);
 	int		(*d_poll)(dev_t, int, struct lwp *);
 	paddr_t		(*d_mmap)(dev_t, off_t, int);
 	int		(*d_kqfilter)(dev_t, struct knote *);
 	int		(*d_discard)(dev_t, off_t, off_t);
 	int		d_flag;
 };
 #ifdef _KERNEL
 #include <sys/mutex.h>
 extern kmutex_t device_lock;
 int devsw_attach(const char *, const struct bdevsw *, devmajor_t *,
 		 const struct cdevsw *, devmajor_t *);
 int devsw_detach(const struct bdevsw *, const struct cdevsw *);
 const struct bdevsw *bdevsw_lookup(dev_t);
 const struct cdevsw *cdevsw_lookup(dev_t);
 devmajor_t bdevsw_lookup_major(const struct bdevsw *);
 devmajor_t cdevsw_lookup_major(const struct cdevsw *);
 #define	dev_type_open(n)	int n (dev_t, int, int, struct lwp *)
 #define	dev_type_close(n)	int n (dev_t, int, int, struct lwp *)
 #define	dev_type_read(n)	int n (dev_t, struct uio *, int)
 #define	dev_type_write(n)	int n (dev_t, struct uio *, int)
 #define	dev_type_ioctl(n) \
 		int n (dev_t, u_long, void *, int, struct lwp *)
 #define	dev_type_stop(n)	void n (struct tty *, int)
 #define	dev_type_tty(n)		struct tty * n (dev_t)
 #define	dev_type_poll(n)	int n (dev_t, int, struct lwp *)
 #define	dev_type_mmap(n)	paddr_t n (dev_t, off_t, int)
 #define	dev_type_strategy(n)	void n (struct buf *)
 #define	dev_type_dump(n)	int n (dev_t, daddr_t, void *, size_t)
 #define	dev_type_size(n)	int n (dev_t)
 #define	dev_type_kqfilter(n)	int n (dev_t, struct knote *)
 #define dev_type_discard(n)	int n (dev_t, off_t, off_t)
-#define	noopen		((dev_type_open((*)))enodev)
+int devenodev(dev_t, ...);
-#define	noclose		((dev_type_close((*)))enodev)
+int deveopnotsupp(dev_t, ...);
-#define	noread		((dev_type_read((*)))enodev)
+int devnullop(dev_t, ...);
-#define	nowrite		((dev_type_write((*)))enodev)
+int ttyenodev(struct tty *, ...);
-#define	noioctl		((dev_type_ioctl((*)))enodev)
+void ttyvenodev(struct tty *, ...);
-#define	nostop		((dev_type_stop((*)))enodev)
+void ttyvnullop(struct tty *, ...);
 #define	noopen		((dev_type_open((*)))devenodev)
 #define	noclose		((dev_type_close((*)))devenodev)
 #define	noread		((dev_type_read((*)))devenodev)
 #define	nowrite		((dev_type_write((*)))devenodev)
 #define	noioctl		((dev_type_ioctl((*)))devenodev)
 #define	nostop		((dev_type_stop((*)))ttyvenodev)
 #define	notty		NULL
 #define	nopoll		seltrue
 paddr_t	nommap(dev_t, off_t, int);
-#define	nodump		((dev_type_dump((*)))enodev)
+#define	nodump		((dev_type_dump((*)))devenodev)
 #define	nosize		NULL
 #define	nokqfilter	seltrue_kqfilter
-#define nodiscard	((dev_type_discard((*)))enodev)
+#define	nodiscard	((dev_type_discard((*)))devenodev)
-#define	nullopen	((dev_type_open((*)))nullop)
+#define	nullopen	((dev_type_open((*)))devnullop)
-#define	nullclose	((dev_type_close((*)))nullop)
+#define	nullclose	((dev_type_close((*)))devnullop)
-#define	nullread	((dev_type_read((*)))nullop)
+#define	nullread	((dev_type_read((*)))devnullop)
-#define	nullwrite	((dev_type_write((*)))nullop)
+#define	nullwrite	((dev_type_write((*)))devnullop)
-#define	nullioctl	((dev_type_ioctl((*)))nullop)
+#define	nullioctl	((dev_type_ioctl((*)))devnullop)
-#define	nullstop	((dev_type_stop((*)))nullop)
+#define	nullstop	((dev_type_stop((*)))ttyvnullop)
-#define	nullpoll	((dev_type_poll((*)))nullop)
+#define	nullpoll	((dev_type_poll((*)))devnullop)
-#define	nulldump	((dev_type_dump((*)))nullop)
+#define	nulldump	((dev_type_dump((*)))devnullop)
-#define	nullkqfilter	((dev_type_kqfilter((*)))eopnotsupp)
+#define	nullkqfilter	((dev_type_kqfilter((*)))deveopnotsupp)
-#define nulldiscard	((dev_type_discard((*)))nullop)
+#define	nulldiscard	((dev_type_discard((*)))devnullop)
 /* device access wrappers. */
 dev_type_open(bdev_open);
 dev_type_close(bdev_close);
 dev_type_strategy(bdev_strategy);
 dev_type_ioctl(bdev_ioctl);
 dev_type_dump(bdev_dump);
 dev_type_size(bdev_size);
 dev_type_discard(bdev_discard);
 dev_type_open(cdev_open);
 dev_type_close(cdev_close);
 dev_type_read(cdev_read);
 dev_type_write(cdev_write);
 dev_type_ioctl(cdev_ioctl);
 dev_type_stop(cdev_stop);
 dev_type_tty(cdev_tty);
 dev_type_poll(cdev_poll);
 dev_type_mmap(cdev_mmap);
 dev_type_kqfilter(cdev_kqfilter);
 dev_type_discard(cdev_discard);
 int	cdev_type(dev_t);
 int	cdev_flags(dev_t);
 int	bdev_type(dev_t);
 int	bdev_flags(dev_t);
 /* symbolic sleep message strings */
 extern	const char devopn[], devio[], devwait[], devin[], devout[];
 extern	const char devioc[], devcls[];
 #endif /* _KERNEL */
 /*
  * Line discipline switch table
  */
 struct linesw {
 	const char *l_name;	/* Linesw name */
 	LIST_ENTRY(linesw) l_list;
 	u_int	l_refcnt;	/* locked by ttyldisc_list_slock */
 	int	l_no;		/* legacy discipline number (for TIOCGETD) */
 	int	(*l_open)	(dev_t, struct tty *);
 	int	(*l_close)	(struct tty *, int);
 	int	(*l_read)	(struct tty *, struct uio *, int);
 	int	(*l_write)	(struct tty *, struct uio *, int);
 	int	(*l_ioctl)	(struct tty *, u_long, void *, int,
 				    struct lwp *);
 	int	(*l_rint)	(int, struct tty *);
 	int	(*l_start)	(struct tty *);
 	int	(*l_modem)	(struct tty *, int);
 	int	(*l_poll)	(struct tty *, int, struct lwp *);
 };
 #ifdef _KERNEL
 void	       ttyldisc_init(void);
 int	       ttyldisc_attach(struct linesw *);
 int	       ttyldisc_detach(struct linesw *);
 struct linesw *ttyldisc_lookup(const char *);
 struct linesw *ttyldisc_lookup_bynum(int);
 struct linesw *ttyldisc_default(void);
 void	       ttyldisc_release(struct linesw *);
 /* For those defining their own line disciplines: */
 #define	ttynodisc ((int (*)(dev_t, struct tty *))enodev)
 #define	ttyerrclose ((int (*)(struct tty *, int))enodev)
 #define	ttyerrio ((int (*)(struct tty *, struct uio *, int))enodev)
 #define	ttyerrstart ((int (*)(struct tty *))enodev)
 int	ttyerrpoll (struct tty *, int, struct lwp *);
 int	ttynullioctl(struct tty *, u_long, void *, int, struct lwp *);
 int	iskmemdev(dev_t);
 int	seltrue_kqfilter(dev_t, struct knote *);
 #endif
 #ifdef _KERNEL
 #define	DEV_MEM		0	/* minor device 0 is physical memory */
 #define	DEV_KMEM	1	/* minor device 1 is kernel memory */
 #define	DEV_NULL	2	/* minor device 2 is EOF/rathole */
 #ifdef COMPAT_16
 #define	_DEV_ZERO_oARM	3	/* reserved: old ARM /dev/zero minor */
 #endif
 #define DEV_FULL	11	/* minor device 11 is '\0'/ENOSPC */
 #define	DEV_ZERO	12	/* minor device 12 is '\0'/rathole */
 enum devnode_class {
 	DEVNODE_DONTBOTHER,
 	DEVNODE_SINGLE,
 	DEVNODE_VECTOR,
 };
 #define DEVNODE_FLAG_LINKZERO	0x01	/* create name -> name0 link */
 #define DEVNODE_FLAG_ISMINOR0	0x02	/* vector[0] specifies minor */
 #ifdef notyet
 #define DEVNODE_FLAG_ISMINOR1	0x04	/* vector[1] specifies starting minor */
 #endif
 struct devsw_conv {
 	const char *d_name;
 	devmajor_t d_bmajor;
 	devmajor_t d_cmajor;
 	/* information about /dev nodes related to the device */
 	enum devnode_class d_class;
 	int d_flags;
 	int d_vectdim[2];
 };
 void devsw_init(void);
 const char *devsw_blk2name(devmajor_t);
 const char *cdevsw_getname(devmajor_t);
 const char *bdevsw_getname(devmajor_t);
 devmajor_t devsw_name2blk(const char *, char *, size_t);
 devmajor_t devsw_name2chr(const char *, char *, size_t);
 dev_t devsw_chr2blk(dev_t);
 dev_t devsw_blk2chr(dev_t);
 void mm_init(void);
 #endif /* _KERNEL */
 #ifdef _KERNEL
 void	setroot(device_t, int);
 void	rootconf(void);
 void	swapconf(void);
 #endif /* _KERNEL */
 #endif /* !_SYS_CONF_H_ */