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    SubjectRe: [RFC] unify semaphore implementations
    Benjamin LaHaise writes:

    > There are at least two users who need asynchronous semaphore/mutex
    > operations: aio_write (which needs to acquire i_sem), and nfs.

    What do you mean by asynchronous semaphore/mutex operations? Are you
    talking about a down operation that will acquire the semaphore if it
    is free, but if not, arrange for a callback and return immediately, or
    something?

    Paul.
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