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Commit f581ab3642b7e4cd4505a294fd15fef685d1523e is a modified patch from upstream
685fd0b4ea3f0f1d5385610b0d5b57775a8d5842. It was modified to preserve kabi. However commit 7d01b332f82a03d4d3f27d2f85394cc887c2dff2 is a cherry-pick that assumes the original (non-kabi-preserving) change to __disable_irq() is in place. That cherry-pick also needs to be modified to handle the other case we kept (IRQF_TIMER).

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Patch(es) available on kernel-2.6.32-117.el6

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-2011-0542.html