Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH -mmotm] fbmem: fix fb_info->lock and mm->mmap_sem circular locking dependency | Date | Thu, 5 Feb 2009 02:49:25 +0100 |
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On Thursday 05 February 2009, Rafael J. Wysocki wrote: > On Wednesday 04 February 2009, Andrea Righi wrote: > > Fix this circular locking dependencies in the frame buffer console > > driver pushing down the mutex fb_info->lock. > > > > Circular locking dependecies occur calling the blocking > > fb_notifier_call_chain() with fb_info->lock held. Notifier callbacks can > > try to acquire mm->mmap_sem, while fb_mmap() acquires the locks in the > > reverse order mm->mmap_sem => fb_info->lock. > > Does this fix a Bugzilla bug? If so, then which one?
Never mind, found it.
Thanks, Rafael
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