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    SubjectRe: [PATCH] make atomic_t volatile on all architectures


    On Thu, 9 Aug 2007, Chuck Ebbert wrote:
    >
    > You can use this forget() macro to make the compiler reread a variable:
    >
    > #define forget(var) asm volatile ("" : "=m"(var))

    No. That will also make the compiler "forget" any previous writes to it,
    so it changes behaviour.

    You'd have to use "+m".

    Linus
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