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Old 02-08-2012, 03:39 PM
 
Default Patch "lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging" has been added to the 3.2-stable tree

This is a note to let you know that I've just added the patch titled

lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging

to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
lockdep-bug-exclude-taint_oot_module-from-disabling-lock-debugging.patch
and it can be found in the queue-3.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9ec84acee1e221d99dc33237bff5e82839d10cc0 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Wed, 7 Dec 2011 14:30:58 +0000
Subject: lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging

From: Ben Hutchings <ben@decadent.org.uk>

commit 9ec84acee1e221d99dc33237bff5e82839d10cc0 upstream.

We do want to allow lock debugging for GPL-compatible modules
that are not (yet) built in-tree. This was disabled as a
side-effect of commit 2449b8ba0745327c5fa49a8d9acffe03b2eded69
('module,bug: Add TAINT_OOT_MODULE flag for modules not built
in-tree'). Lock debug warnings now include taint flags, so
kernel developers should still be able to deflect warnings
caused by out-of-tree modules.

The TAINT_PROPRIETARY_MODULE flag for non-GPL-compatible modules
will still disable lock debugging.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Nick Bowler <nbowler@elliptictech.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Debian kernel maintainers <debian-kernel@lists.debian.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/1323268258.18450.11.camel@deadeye
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
kernel/panic.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -237,11 +237,12 @@ void add_taint(unsigned flag)
* Can't trust the integrity of the kernel anymore.
* We don't call directly debug_locks_off() because the issue
* is not necessarily serious enough to set oops_in_progress to 1
- * Also we want to keep up lockdep for staging development and
- * post-warning case.
+ * Also we want to keep up lockdep for staging/out-of-tree
+ * development and post-warning case.
*/
switch (flag) {
case TAINT_CRAP:
+ case TAINT_OOT_MODULE:
case TAINT_WARN:
case TAINT_FIRMWARE_WORKAROUND:
break;


Patches currently in stable-queue which might be from ben@decadent.org.uk are

queue-3.2/lockdep-bug-exclude-taint_firmware_workaround-from-disabling-lockdep.patch
queue-3.2/lockdep-bug-exclude-taint_oot_module-from-disabling-lock-debugging.patch


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