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    SubjectRE: 2.6.22-rc1-mm1 - s390 vs. md
    On Tue, 2007-05-22 at 17:25 -0700, Williams, Dan J wrote:
    > The approach I have taken is to add the missing definitions to
    > include/asm-s390/dma-mapping.h [ a non-outlook-mangled version of the
    > patch is pushed out in my rebased git tree ]. I was not able to fully
    > compile-test this change as the three s390-cross-toolchains I tried
    > each

    We are trying to get rid of dma-mapping.h, see the last change to the
    file with commit 411f0f3edc141a582190d3605cadd1d993abb6df. I don't think
    we should reintroduce dma related definition but split the async_tx in a
    way that allows to compile it on an architecture with CONFIG_NO_DMA=y
    (yes I know that is harder that to just add the dma stubs).
    You've said that there is a software implementation if there is no dma
    engine present. This software implementation should be independent of
    dma-mapping.h. Without having looked at the code, isn't it possible to
    isolate that software implementation into its own C file? That would be
    the only one that gets compiled for s390.

    blue skies,

    "Reality continues to ruin my life." - Calvin.

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