Simplify cdevsw registration.

The cdevsw_add() function now finds the major number(s) in the
struct cdevsw passed to it.  cdevsw_add_generic() is no longer
needed, cdevsw_add() does the same thing.

cdevsw_add() will print an message if the d_maj field looks bogus.

Remove nblkdev and nchrdev variables.  Most places they were used
bogusly.  Instead check a dev_t for validity by seeing if devsw()
or bdevsw() returns NULL.

Move bdevsw() and devsw() functions to kern/kern_conf.c

Bump __FreeBSD_version to 400006

This commit removes:
        72 bogus makedev() calls
        26 bogus SYSINIT functions

if_xe.c bogusly accessed cdevsw[], author/maintainer please fix.

I4b and vinum not changed.  Patches emailed to authors.  LINT
probably broken until they catch up.

1 files changed, 4 insertions, 16 deletions

diff --git a/sys/isa/joy.c b/sys/isa/joy.c
index 6847f43..a2edbd5 100644
--- a/sys/isa/joy.c
+++ b/sys/isa/joy.c
@@ -120,6 +120,10 @@ static int get_tick __P((void));
 static int
 joyprobe (struct isa_device *dev)
 {
+    static int once;
+
+    if (!once++)
+	cdevsw_add(&joy_cdevsw);
 #ifdef WANT_JOYSTICK_CONNECTED
     outb (dev->id_iobase, 0xff);
     DELAY (10000); /*  10 ms delay */
@@ -251,22 +255,6 @@ get_tick ()
     return (high << 8) | low;
 }
 
-
-static int joy_devsw_installed;
-
-static void 	joy_drvinit(void *unused)
-{
-	dev_t dev;
-
-	if( ! joy_devsw_installed ) {
-		dev = makedev(CDEV_MAJOR,0);
-		cdevsw_add(&dev,&joy_cdevsw,NULL);
-		joy_devsw_installed = 1;
-    	}
-}
-
-SYSINIT(joydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,joy_drvinit,NULL)
-
 #ifdef JOY_MODULE
 
 #include <sys/exec.h>