Re: miscfs/specfs/spec_vnops.c panic (triggered by filemon(4))

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

   Date: Tue, 5 Jan 2016 09:39:15 +0800 (PHT)
   From: Paul Goyette <paul%whooppee.com@localhost>

   On Tue, 5 Jan 2016, Taylor R Campbell wrote:

   > So I think DIAGNOSTIC condition is wrong.  I think the right condition
   > is probably uio->uio_vmspace == vmspace_kernel().

   Yes, this make a lot of sense.  I will fix it in both spec_write() and 
   in spec_read().

I glanced at some other callers, and it looks like the usual idiom is
VMSPACE_IS_KERNEL_P(uio->uio_vmspace).  (This actually checks whether
the vmspace's vm_map's pmap is pmap_kernel(), although I'm not sure
there are going to be any other vmspaces than vmspace_kernel() for
which that is true.)