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    SubjectRe: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock()
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    On Mon, 2008-08-04 at 12:31 -0700, Linus Torvalds wrote:
    >
    > On Mon, 4 Aug 2008, Jeremy Fitzhardinge wrote:
    > >
    > > OK. I don't actually need to do this, but I was asking for completeness. But
    > > to clarify, you only need to do the reverse unlock if you do it after
    > > unlocking the outer lock? If you're still holding the outer lock, you can
    > > unlock in any order?
    >
    > Release order should always be totally irrelevant, whether you hold outer
    > locks or not. Only the order of _getting_ locks matter.
    >
    > And yes, if there is an outer lock, even the order of getting locks is
    > irrelevant, as long as anybody who gets more than one inner lock always
    > holds the outer one.

    I agree, its just non-trivial to convince lockdep of this. I can give it
    a go though.



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