target/linux/generic/patches-3.2/031-lockdep-bug-Exclude-TAINT_OOT_MODULE-from-disabling-.patch

   1 From 9ec84acee1e221d99dc33237bff5e82839d10cc0 Mon Sep 17 00:00:00 2001
   2 From: Ben Hutchings <ben@decadent.org.uk>
   3 Date: Wed, 7 Dec 2011 14:30:58 +0000
   4 Subject: [PATCH 2/2] lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging
   5
   6 We do want to allow lock debugging for GPL-compatible modules
   7 that are not (yet) built in-tree.  This was disabled as a
   8 side-effect of commit 2449b8ba0745327c5fa49a8d9acffe03b2eded69
   9 ('module,bug: Add TAINT_OOT_MODULE flag for modules not built
  10 in-tree').  Lock debug warnings now include taint flags, so
  11 kernel developers should still be able to deflect warnings
  12 caused by out-of-tree modules.
  13
  14 The TAINT_PROPRIETARY_MODULE flag for non-GPL-compatible modules
  15 will still disable lock debugging.
  16
  17 Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
  18 Cc: Nick Bowler <nbowler@elliptictech.com>
  19 Cc: Greg KH <greg@kroah.com>
  20 Cc: Dave Jones <davej@redhat.com>
  21 Cc: Rusty Russell <rusty@rustcorp.com.au>
  22 Cc: Randy Dunlap <rdunlap@xenotime.net>
  23 Cc: Debian kernel maintainers <debian-kernel@lists.debian.org>
  24 Cc: Peter Zijlstra <peterz@infradead.org>
  25 Cc: Alan Cox <alan@linux.intel.com>
  26 Link: http://lkml.kernel.org/r/1323268258.18450.11.camel@deadeye
  27 Signed-off-by: Ingo Molnar <mingo@elte.hu>
  28 ---
  29  kernel/panic.c |    5 +++--
  30  1 files changed, 3 insertions(+), 2 deletions(-)
  31
  32 --- a/kernel/panic.c
  33 +++ b/kernel/panic.c
  34 @@ -237,11 +237,12 @@ void add_taint(unsigned flag)
  35          * Can't trust the integrity of the kernel anymore.
  36          * We don't call directly debug_locks_off() because the issue
  37          * is not necessarily serious enough to set oops_in_progress to 1
  38 -        * Also we want to keep up lockdep for staging development and
  39 -        * post-warning case.
  40 +        * Also we want to keep up lockdep for staging/out-of-tree
  41 +        * development and post-warning case.
  42          */
  43         switch (flag) {
  44         case TAINT_CRAP:
  45 +       case TAINT_OOT_MODULE:
  46         case TAINT_WARN:
  47         case TAINT_FIRMWARE_WORKAROUND:
  48                 break;