Messages in this thread | | | Date | Thu, 5 Jul 2007 10:45:38 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] debug work struct cancel deadlocks with lockdep |
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* Johannes Berg <johannes@sipsolutions.net> wrote:
> +#ifdef CONFIG_LOCKDEP > + /* > + * It is permissible to free the struct work_struct > + * from inside the function that is called from it, > + * this we need to take into account for lockdep too. > + * To avoid bogus "held lock freed" warnings as well > + * as problems when looking into work->lockdep_map, > + * make a copy and use that here. > + */ > + struct lockdep_map lockdep_map = work->lockdep_map; > +#endif
> + lock_acquire(&lockdep_map, 0, 0, 0, 2, _THIS_IP_); > f(work); > + lock_release(&lockdep_map, 1, _THIS_IP_);
neat trick :)
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