On Fri, 16 Aug 2002, dmk wrote:
> On Thu, 15 Aug 2002, dmk wrote:
> > 
> > Is anybody successfully using the port emulators/rtc with vmware2 on
> > -current?
> [...]
> On Thu, Aug 15, 2002 at 01:36:46PM -0400 Robert Watson wrote:
> > My recollection is that the problem relates to calling make_dev() from the
> > attach routine, and attach from the open call, and of course you can't
> > open before you make_dev with devfs.  Someone needs to restructure the
> > driver to match some our other pseudo-device drivers where the device is
> > properly created as part of module initialization.  
> [...]
> > Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
> > [EMAIL PROTECTED]      Network Associates Laboratories
> The attached diff effectively restructures the rtc device driver to
> perform the make_dev() at module load. The driver may have problems, but
> it does work, and, unlike the first diff, doesn't segfault on unload. ;-)
> (I don't claim to write C or hack kernels, so this presented as-is in

Generally it's more appropriate to do cdevsw_add() in module init and then
make_dev() in each open.  That's the ONLY way to do it if you have
multiple instances of a device (e.g. BPF).


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