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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-11-14 13:13:49 +0100
committerIngo Molnar <mingo@elte.hu>2011-12-06 08:16:47 +0100
commitdf754e6af2f237a6c020c0daff55a1a609338e31 (patch)
tree138bfed4fccbba3671473a6768c91a9c3b9b8e84 /kernel/panic.c
parent7119a341f35b0a3ddcf426818267980057c770a1 (diff)
lockdep, bug: Exclude TAINT_FIRMWARE_WORKAROUND from disabling lockdep
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>
Diffstat (limited to 'kernel/panic.c')
-rw-r--r--kernel/panic.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index b26593604214..1b83fd80b569 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -240,8 +240,16 @@ 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);
}