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Description of problem:

Add a padding field to request_list structure. I am expecting there will
be more development in IO controller in RHEL6 life cycle and this structure
should get modified for per group request descriptors and that will break
kABI.

So adding padding can help backporting new functionality at the same time
preserve kabi.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
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Actual results:


Expected results:


Additional info:

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Patch(es) available on kernel-2.6.32-32.el6

Confirmed we have redhat_reserved padding in the request_list structure (include/linux/blkdev.h)

Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.