kern/51444: ext2fs tests fail on sparc

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         51444
>Category:       kern
>Synopsis:       ext2fs tests fail on sparc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Aug 26 08:35:00 +0000 2016
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2016.08.21.08.27.57
>Organization:
>Environment:
System: NetBSD
Architecture: sparc
Machine: sparc
>Description:

The number of failing test cases on sparc jumped from 17 to 73
recently.  Here is the log output from one of the failing tests:

   Test case: fs/vfs/t_full/ext2fs_fillfs

   Duration: 0.720000 seconds

   Termination reason

   FAILED: newfs failed: Undefined error: 0

   Standard error stream

   newfs_ext2fs: rdfs: read error for sector 167772162: Operation not supported

The problem appeared during a period of build breakage when the following
commits were made:

  2016.08.20.19.47.44 jdolecek src/sys/ufs/ext2fs/ext2fs.h 1.48
  2016.08.20.19.47.44 jdolecek src/sys/ufs/ext2fs/ext2fs_alloc.c 1.49
  2016.08.20.19.47.44 jdolecek src/sys/ufs/ext2fs/ext2fs_bswap.c 1.24
  2016.08.20.19.47.44 jdolecek src/sys/ufs/ext2fs/ext2fs_extern.h 1.55
  2016.08.20.19.47.44 jdolecek src/sys/ufs/ext2fs/ext2fs_vfsops.c 1.200
  2016.08.20.19.51.50 jdolecek src/sys/ufs/ext2fs/ext2fs_alloc.c 1.50
  2016.08.20.19.53.43 jdolecek src/sys/ufs/ext2fs/ext2fs_alloc.c 1.51
  2016.08.20.20.05.28 jdolecek src/sys/ufs/ext2fs/ext2fs_vfsops.c 1.201
  2016.08.20.20.09.47 mrg src/sys/uvm/pmap/pmap.c 1.21
  2016.08.20.20.19.08 joerg src/external/mit/xorg/lib/libdrm/Makefile 1.14
  2016.08.20.20.22.53 mrg src/external/mit/xorg/server/drivers/xf86-video-nouveau/Makefile 1.3
  2016.08.20.20.22.53 mrg src/external/mit/xorg/server/drivers/xf86-video-openchrome/Makefile 1.9
  2016.08.20.20.22.53 mrg src/external/mit/xorg/server/drivers/xf86-video-siliconmotion/Makefile 1.9
  2016.08.20.20.22.54 mrg src/external/mit/xorg/server/drivers/xf86-video-sis/Makefile 1.13
  2016.08.20.20.22.54 mrg src/external/mit/xorg/server/drivers/xf86-video-suncg6/Makefile 1.7
  2016.08.20.20.22.54 mrg src/external/mit/xorg/server/drivers/xf86-video-sunffb/Makefile 1.9
  2016.08.20.21.22.25 jdolecek src/sys/ufs/ext2fs/ext2fs_vfsops.c 1.202
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xdebug/md.amd64 1.34
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xdebug/md.i386 1.30
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xdebug/md.macppc 1.9
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xdebug/md.ofppc 1.9
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xdebug/md.shark 1.10
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xserver/md.amd64 1.96
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xserver/md.i386 1.113
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xserver/md.macppc 1.72
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xserver/md.ofppc 1.25
  2016.08.20.23.56.19 mrg src/distrib/sets/lists/xserver/md.shark 1.48
  2016.08.20.23.56.20 mrg src/external/mit/xorg/server/drivers/Makefile 1.86
  2016.08.21.08.27.57 christos src/sys/lib/libsa/ext2fs.c 1.25

>How-To-Repeat:

Run the ATF tests on sparc, or inspect the log output from the testbed at

  http://releng.netbsd.org/b5reports/sparc/commits-2016.08.html#2016.08.21.08.27.57

>Fix: