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    SubjectRe: [PATCH 1/2] tracing/function-return-tracer: Make the function return tracer lockless
    > So the answer to this is:
    > i = index++;
    > barrier();
    > write to index i (not index);

    That was my first thought when I wrote the original email,
    but the disadvantage is that barrier() is a big hammer
    that flushes everything and can make the code much worse.
    That is why I suggested local_add_return() instead.



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