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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-11-14 13:13:49 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-13 11:06:10 -0800
commitd378b2d044139f88384d278bd5830669c44c789b (patch)
tree4798988a3ac3182f38dfa8b3b6459833a6f40596
parente02c339f506e10fadf8a5f00f1c932035596ed8e (diff)
lockdep, bug: Exclude TAINT_FIRMWARE_WORKAROUND from disabling lockdep
commit df754e6af2f237a6c020c0daff55a1a609338e31 upstream. It's unlikely that TAINT_FIRMWARE_WORKAROUND causes false lockdep messages, so do not disable lockdep in that case. We still want to keep lockdep disabled in the TAINT_OOT_MODULE case: - bin-only modules can cause various instabilities in their and in unrelated kernel code - they are impossible to debug for kernel developers - they also typically do not have the copyright license permission to link to the GPL-ed lockdep code. Suggested-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-xopopjjens57r0i13qnyh2yo@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--kernel/panic.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 69231670eb95..8e48cf6ab56d 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -236,8 +236,16 @@ void add_taint(unsigned flag)
* Also we want to keep up lockdep for staging development and
* post-warning case.
*/
- if (flag != TAINT_CRAP && flag != TAINT_WARN && __debug_locks_off())
- printk(KERN_WARNING "Disabling lock debugging due to kernel taint\n");
+ switch (flag) {
+ case TAINT_CRAP:
+ case TAINT_WARN:
+ case TAINT_FIRMWARE_WORKAROUND:
+ break;
+
+ default:
+ if (__debug_locks_off())
+ printk(KERN_WARNING "Disabling lock debugging due to kernel taint\n");
+ }
set_bit(flag, &tainted_mask);
}