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Bug 154435 - kernel dm-emc: Fix spinlock reset
Summary: kernel dm-emc: Fix spinlock reset
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.2
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Alasdair Kergon
QA Contact:
Depends On:
Blocks: 156322
TreeView+ depends on / blocked
Reported: 2005-04-11 17:47 UTC by Alasdair Kergon
Modified: 2007-11-30 22:07 UTC (History)
6 users (show)

Fixed In Version: RHSA-2005-514
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-10-05 12:58:14 UTC
Target Upstream Version:

Attachments (Terms of Use)
spinlock fix (deleted)
2005-04-11 17:47 UTC, Alasdair Kergon
no flags Details | Diff

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:514 qe-ready SHIPPED_LIVE Important: Updated kernel packages available for Red Hat Enterprise Linux 4 Update 2 2005-10-05 04:00:00 UTC

Description Alasdair Kergon 2005-04-11 17:47:00 UTC
Here's a trivial fix to the emc hardware
handler module. The old code memset the hardware handler
structure to zero AFTER it had initialized the structure's
spinlock field to SPIN_LOCK_UNLOCKED.  The new patch moves the
memset into the hardware handler allocator.
The old code would probably only have a problem if someone
ran with spinlock debugging enabled, in which case SPIN_LOCK_UNLOCKED
contains the value SPINLOCK_MAGIC.
[Dave Olien, OSDL]

Comment 1 Alasdair Kergon 2005-04-11 17:47:01 UTC
Created attachment 112966 [details]
spinlock fix

Comment 2 Lars Marowsky-Bree 2005-04-20 19:54:57 UTC
Confirmed locally and applied.

Comment 3 Alasdair Kergon 2005-04-21 17:51:13 UTC
Added to 2.6.12-rc2-udm1

Comment 8 Red Hat Bugzilla 2005-10-05 12:58:14 UTC
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 the 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.

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