System panicing on boot since recent uvm changes

[Andreas Gustafsson <gson%gson.org@localhost>]

Hi chs,

At least i386, amd64, and sparc are all panicing on boot since this commit:

  2020.08.14.09.06.14 chs src/sys/miscfs/genfs/genfs_io.c 1.100
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_extern.h 1.231
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_object.c 1.24
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_object.h 1.39
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_page.c 1.245
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_page_status.c 1.6
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_pager.c 1.129
  2020.08.14.09.06.15 chs src/sys/uvm/uvm_vnode.c 1.116

Logs:

  http://releng.netbsd.org/b5reports/i386/commits-2020.08.html#2020.08.14.09.06.15

Please revert the commit.
-- 
Andreas Gustafsson, gson%gson.org@localhost