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    SubjectRe: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    Christoph Lameter writes:

    > No it does not have any volatile semantics. atomic_dec() can be reordered
    > at will by the compiler within the current basic unit if you do not add a
    > barrier.

    Volatile doesn't mean it can't be reordered; volatile means the
    accesses can't be eliminated.

    Paul.
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