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    SubjectRe: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it


    On Wed, 6 Dec 2006, David Howells wrote:
    >
    > Implement generic UP cmpxchg() where an arch doesn't otherwise support it.
    > This assuming that the arch doesn't have support SMP without providing its own
    > cmpxchg() implementation.

    This is too ugly to live. At least the kernel/workqueue.c part.

    The requirement that everybody implement a workable cmpxchg (and falling
    back to spinlocks if required as per the atomic bit operations) looks ok,
    but don't show that in generic code.

    Linus
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