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This bug has been copied from bug #641408 and has been proposed
to be backported to 6.0 z-stream (EUS).

in 2.6.32-71.6.1.el6

SanityOnly. We don't have an s390 tape drive.

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0842.html

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    New Contents:
Previously, calling the elevator_change function immediately after the blk_init_queue function resulted in a null pointer dereference. With this update, the null pointer dereference no longer occurs.