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    SubjectRe: spin_unlock optimization(i386)

    On Fri, 26 Nov 1999, Helge Hafting wrote:

    > Don't be confused when this too eventually breaks when tested.
    > The counters will wrap, i slightly before j, and that may trigger the
    > BUG().

    yep, right.

    > For a safe test, change the first loop to:
    >
    > if (i == 0x7FFFFFFF) {
    > j = 0;
    > i = 0;
    > }

    yep, subtle, and the order of those two stores is not irrelevant either.

    Ingo


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