[Precise][SRU][PATCH 0/1] Revert upstream stable commit 73d63d03

leann.ogasawara at canonical.com leann.ogasawara at canonical.com
Tue Apr 10 13:35:44 UTC 2012

From: Leann Ogasawara <leann.ogasawara at canonical.com>

=== Precise SRU Justification ===
The latest Precise Kernel (linux-headers-3.2.0-22-generic 3.2.0-22.35)
does not boot in pvops mode due to a kernel NULL pointer dereference
oops generated in xen_irq_init.

=== Fix ===
Revert commit 73d63d03 which was included in upstream stable v3.2.14.
Based on discusson upstream regarding this commit, it appears it should
not have been applied to upstream stable v3.2.y:


commit 73d63d038ee9f769f5e5b46792d227fe20e442c5
Author: Suresh Siddha <suresh.b.siddha at intel.com>
Date: Mon Mar 12 11:36:33 2012 -0700

    x86/ioapic: Add register level checks to detect bogus io-apic

Leann Ogasawara (1):
  Revert "x86/ioapic: Add register level checks to detect bogus io-apic

 arch/x86/kernel/apic/io_apic.c |   40 ++++++++--------------------------------
 1 files changed, 8 insertions(+), 32 deletions(-)

=== Testing ===
The bug reporter has tested a kernel with the above commit reverted.
They confirm the machine boots properly.

Note, the same patch also went into upstream stable v3.0.y and hit
Oneiric, commit f9021c45.  I do not have test confirmation for Oneiric,
but I believe the evidence to be sufficient enough to support reverting
in Oneiric as well.

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