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SubjectRe: [PATCH -mmotm] fbmem: fix fb_info->lock and mm->mmap_sem circular locking dependency
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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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