Messages in this thread | | | Subject | Re: [PATCH] lockdep: lockdep_depth vs. debug_locks Re: [2.6.20] BUG: workqueue leaked lock | From | Peter Zijlstra <> | Date | Thu, 22 Mar 2007 08:22:37 +0100 |
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On Thu, 2007-03-22 at 07:11 +0100, Jarek Poplawski wrote: > Here is some joke: > > [PATCH] lockdep: lockdep_depth vs. debug_locks > > lockdep really shouldn't be used when debug_locks == 0!
This happens then lockdep reports a fatal error, at which point it will stop tracking locks and leave whatever state was there.
> Reported-by: Folkert van Heusden <folkert@vanheusden.com> > Inspired-by: Oleg Nesterov <oleg@tv-sign.ru> > Signed-off-by: Jarek Poplawski <jarkao2@o2.pl>
This looks sane, thanks for figuring this out.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> --- > > diff -Nurp 2.6.21-rc4-git4-/include/linux/lockdep.h 2.6.21-rc4-git4/include/linux/lockdep.h > --- 2.6.21-rc4-git4-/include/linux/lockdep.h 2007-03-20 20:24:17.000000000 +0100 > +++ 2.6.21-rc4-git4/include/linux/lockdep.h 2007-03-21 22:32:41.000000000 +0100 > @@ -245,7 +245,7 @@ extern void lock_release(struct lockdep_ > > # define INIT_LOCKDEP .lockdep_recursion = 0, > > -#define lockdep_depth(tsk) ((tsk)->lockdep_depth) > +#define lockdep_depth(tsk) (debug_locks ? (tsk)->lockdep_depth : 0) > > #else /* !LOCKDEP */ >
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