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From: brawley@communica.com.au (Ivan Brawley)
Message-Id: <9612300742.AA05225@communica.com.au>
Subject: LKMs and character special devices
To: freebsd-bugs@freebsd.org
Date: Mon, 30 Dec 1996 18:12:28 +1030 (CST)
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After spending quite some time (too much time) on trying to port
a package to FreeBSD 2.2, I noticed something.

In the file /usr/src/sys/kern/kern_lkm.c where it does some of the
initializing of the LKMs,  noticed that there is code to add a block
special device through a LKM, but not a character special device.
Case statement begins at line 688 (or there abouts) in function
_lkm_dev().

Theres just a break in the case statment for the case of LM_DT_CHAR.

Meaning, for someone to write a LKM that adds a character special
device to the system, must add the entery into the cdevsw list themselves.

The next querk I found was in /usr/include/sys/lkm.h.

The MOD_DEV macro seems to be wrong in defining _module (rather, it
tryes to define name ## _module, then when you try to use the
DISPATCH macro, the compiler errs with "_module symbol not found".

The problem I have noticed is in versions 960501-SNAP, 960801-SNAP and
the October snap, and the 2.2 BETA release.

Thanks.
Ivan Brawley.