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    SubjectRe: [PATCH][RFC] asm-generic:remove calling flush_write_buffers() in dma_sync_*_for_cpu
    > Of course that raises the question of whether smp_wmb() is too weak in case of
    > !SMP or X86_PPRO_FENCE, but with the described scenario, I don't think
    > it does.

    I'm pretty sure it is for the Winchip -but we don't care as there are no
    SMP ones. OTOH with DMA we do care



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