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    SubjectRe: [PATCH 21/22] mm: remove the HMM config option
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    On Thu, Jun 13, 2019 at 11:43:24AM +0200, Christoph Hellwig wrote:
    > All the mm/hmm.c code is better keyed off HMM_MIRROR. Also let nouveau
    > depend on it instead of the mix of a dummy dependency symbol plus the
    > actually selected one. Drop various odd dependencies, as the code is
    > pretty portable.

    I don't really know, but I thought this needed the arch restriction
    for the same reason get_user_pages has various unique arch specific
    implementations (it does seem to have some open coded GUP like thing)?

    I was hoping we could do this after your common gup series? But sooner
    is better too.

    Jason

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