SRU request for LP Bug#220493

[Stefan Bader]

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/220493

SRU Justification:

Impact: Regression for users of dmraid.

This is a regression in Hardy which is very simple to fix and otherwise
prevents the use of fakeraid disks (limited hardware controllers on
motherboards) with RAID level 4 and 5.

Fix description: Device-mapper targets normally follow a certain naming
scheme, which enables loading missing target types. The fix will change
the Makefile in LUM to build dm-raid45.ko instead of dm-raid4-5.ko.

Patch: attached

Testcase: Activation of dmraid for RAID4 or RAID5 arrays fails with
error message "dm-raid45 is not in kernel". Verification of fix has been
documentet in the bug report.
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