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    SubjectRe: [PATCH] 2.5.29: some compilation fixes for irq frenzy [OSS + i8x0 audio]
    On Tue, 2002-07-30 at 22:19, Andy Pfiffer wrote:
    > As luck would have it, I booted the kernel and played the tunes on a
    > 2-way P4 Xeon system. Nothing wedged, but then again, I didn't try to
    > break it.
    > So, what did I break?

    SMP support I think. A lot of the save_flags/cli stuff you changed looks
    like it needs to also lock out interrupts on the other processors,
    otherwise you can get a DMA pointer being updated under you.

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