RELENG_8 kernel as of Apr 14 does not boot

[John Baldwin]

On Monday, April 16, 2012 3:59:09 am Eugene Grosbein wrote:
> >>> Just update my 8.x kernel sources last weekend, and newly built kernel did
> >>> not boot for me:
> >>>
> >>> link_elf: symbol mem_range_softc undefined
> >>> KLD file acpi.ko - could not finalize loading
> >>> kernel trap 12 with interrupts disabled
> >>
> >> Try to add 'device mem' to your kernel configuration.
> > 
> > :-)
> > 
> > I explicitly have "nodevice mem" and "nodevice io" in my config.  They are
> > being loaded from /boot/loader.conf.  This worked fine for quite a while.
> > 
> > I will try to have it compiled-in, but would still prefer it fixed, or in
> > case it cannot be fixed and mem.ko cannot be loaded separately from now on,
> > appropriate entry in UPDATING.
> 
> It seems John Baldwin brought dependency of acpi.ko on device mem
> 4 days ago to RELENG_8 with MFC:
> 
> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/i386/acpica/acpi_wakeup.c#rev1.50.2.3

I believe the patch at www.freebsd.org/~jhb/patches/device_mem.patch should fix this.
It reverts part of 217515 and 217539 to move the mem_range_softc back into the base
kernel so it is always present.

-- 
John Baldwin