Divorce "dev_t" from the "major|minor" bitmap, which is now called

udev_t in the kernel but still called dev_t in userland.

Provide functions to manipulate both types:
        major()         umajor()
        minor()         uminor()
        makedev()       umakedev()
        dev2udev()      udev2dev()

For now they're functions, they will become in-line functions
after one of the next two steps in this process.

Return major/minor/makedev to macro-hood for userland.

Register a name in cdevsw[] for the "filedescriptor" driver.

In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.

In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits.  This will essentially
replace the current "alias" check code (same buck, bigger bang).

A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference.  If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.

Without DEVT_FASCIST I belive this patch is a no-op.

Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.

Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/msdosfs/msdosfs_denode.c b/sys/msdosfs/msdosfs_denode.c
index 74be5c4..3c6f9d9 100644
--- a/sys/msdosfs/msdosfs_denode.c
+++ b/sys/msdosfs/msdosfs_denode.c
@@ -1,4 +1,4 @@
-/*	$Id: msdosfs_denode.c,v 1.43 1998/12/07 21:58:34 archie Exp $ */
+/*	$Id: msdosfs_denode.c,v 1.44 1999/01/02 11:34:56 bde Exp $ */
 /*	$NetBSD: msdosfs_denode.c,v 1.28 1998/02/10 14:10:00 mrg Exp $	*/
 
 /*-
@@ -70,7 +70,7 @@ static MALLOC_DEFINE(M_MSDOSFSNODE, "MSDOSFS node", "MSDOSFS vnode private part"
 
 static struct denode **dehashtbl;
 static u_long dehash;			/* size of hash table - 1 */
-#define	DEHASH(dev, dcl, doff)	(dehashtbl[((dev) + (dcl) + (doff) / 	\
+#define	DEHASH(dev, dcl, doff)	(dehashtbl[(minor(dev) + (dcl) + (doff) / 	\
 				sizeof(struct direntry)) & dehash])
 #ifndef NULL_SIMPLELOCKS
 static struct simplelock dehash_slock;