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authorFrederic Weisbecker <fweisbec@gmail.com>2009-04-11 03:17:18 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-12 16:10:52 +0200
commit574bbe782057fdf0490dc7dec906a2dc26363e20 (patch)
treeb322a752f4feb603fe2b2669fad682a79e7479c3 /kernel/panic.c
parent9eeba6138cefc0435695463ddadb0d95e0a6bcd2 (diff)
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lockdep: continue lock debugging despite some taints
Impact: broaden lockdep checks Lockdep is disabled after any kernel taints. This might be convenient to ignore bad locking issues which sources come from outside the kernel tree. Nevertheless, it might be a frustrating experience for the staging developers or those who experience a warning but are focused on another things that require lockdep. The v2 of this patch simply don't disable anymore lockdep in case of TAINT_CRAP and TAINT_WARN events. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: LTP <ltp-list@lists.sourceforge.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Greg KH <gregkh@suse.de> LKML-Reference: <1239412638-6739-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/panic.c')
-rw-r--r--kernel/panic.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 940ca14f6db..934fb377f4b 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -217,8 +217,10 @@ 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.
*/
- if (__debug_locks_off())
+ if (flag != TAINT_CRAP && flag != TAINT_WARN && __debug_locks_off())
printk(KERN_WARNING "Disabling lockdep due to kernel taint\n");
set_bit(flag, &tainted_mask);