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    SubjectRe: [PATCH 2/2] lockdep: Don't only check recursive read locks once in a sequence
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    On Thu, 2009-11-19 at 16:55 +0100, Frederic Weisbecker wrote:
    > And btw I
    > don't understand why rwsem read locks are not considered as
    > recursive in lockdep.

    Because they're not.

    rwsems are FIFO fair, so a double read can deadlock when there's a
    pending writer inbetween.



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