2.6.32-rc6 - 2.6.32-rc6-git3 misinterpreting fstype on boot

[Sid Boyce <g3vbv@blueyonder.co.uk>]

2.6.32-rc5-git4 kernel boots normally, but 2.6.32-rc6 and later exhibit
strangeness - misinterpreting the xfs partition as reiserfs.
The .config is the same.
Under 2.6.32-rc5-git4
======================
# mount
/dev/sda2 on / type xfs (rw) <<======
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
debugfs on /sys/kernel/debug type debugfs (rw)
udev on /dev type tmpfs (rw)
devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
/dev/sda1 on /boot type reiserfs (rw,acl,user_xattr) <<====
/dev/sdb1 on /home/lancelot/ftp type reiserfs (rw)
none on /tmp type tmpfs (rw)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
/proc on /var/lib/ntp/proc type none (ro,bind)
gvfs-fuse-daemon on /home/lancelot/.gvfs type fuse.gvfs-fuse-daemon
(rw,nosuid,nodev,user=lancelot)

 system.firmware.version = 'ASUS CROSSHAIR II FORMULA ACPI BIOS Revision
1802'
  system.firmware.release_date = '05/06/2009'
  system.hardware.vendor = 'System manufacturer'
  system.hardware.product = 'System Product Name'
  system.hardware.version = 'System Version'
  system.chassis.manufacturer = 'Chassis Manufacture'
  system.board.product = 'CROSSHAIR II FORMULA'
  system.board.version = '1.XX'
  system.board.vendor = 'ASUSTeK Computer INC.'
  system.chassis.type = 'Desktop'
  system.formfactor = 'desktop'
CPU is AMD quad core.


When I try to boot 2.6.32-rc6 and 2.6.32-rc6-git, it thinks /dev/sda2
is a reiserfs partition it needs to mount as "/root"????.
Boot up messages
==================
fsck from util-linux-ng 2.16
[/sbin/fsck.reiserfs (1) -- /] fsck.reiserfs -a /dev/sda2
reiserfs_open: the reiserfs superblock cannot be found on /dev/sda2.
REISERFS: warning (device sda2): sh-2021 reiserfs_fill_super: can not
find reiserfs on sda2.
Failed to open the filesystem
  If the partition table has not been changed, the partition is valid
  and really contains a reiserfs  partition, then the superblock is
  corrupted and you need to run this utility with --rebuild-sb.
fsck failed. Mounting root device read-only.
Mounting root /dev/disk/by-id/scsi-SATA_SAMSUNG_HD103UJS13PJDWS258743-part2
mount -o ro -t reiserfs
/dev/disk/by-id/scsi-SATA_SAMSUNG_HD103UJS13PJDWS258743-part2 /root
mount: wrong fstype, bad option, bad superblock on /dev/sda2
could not mount root filesystem - exiting to /bin/sh


No problem on this other box with AMD dual-core and 2.6.32-rc6-git3 running.
system.firmware.vendor = 'Phoenix Technologies, LTD'
  system.firmware.version = 'ASUS M2N32-SLI DELUXE ACPI BIOS Revision 1802'
  system.firmware.release_date = '01/31/2008'
  system.hardware.vendor = 'System manufacturer'
  system.hardware.product = 'System Product Name'
  system.hardware.version = 'System Version'
  system.chassis.manufacturer = 'Chassis Manufacture'
  system.board.product = 'M2N32-SLI DELUXE'
  system.board.version = '1.XX'
  system.board.vendor = 'ASUSTeK Computer INC.'
  system.chassis.type = 'Desktop'
/dev/sda1 on / type xfs (rw)
/dev/sdb1 on /data1 type btrfs (rw)
Regards
Sid.
-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks