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    SubjectRe: [RFC PATCH 5/6] implement per-cpu&per-domain state machine call_srcu()
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    On Thu, 2012-03-08 at 11:49 -0800, Paul E. McKenney wrote:
    >
    > I too have used (long)(a - b) for a long time, but I saw with my own eyes
    > the glee in the compiler-writers' eyes when they discussed signed overflow
    > being undefined in the C standard. I believe that the reasons for signed
    > overflow being undefined are long obsolete, but better safe than sorry.

    Thing is, if they break that the whole kernel comes falling down, I
    really wouldn't worry about RCU at that point. But to each their
    pet-paranoia I guess ;-)


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