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    SubjectRe: [PATCH] remove duplicate asm/mman.h files
    On Mon, 21 Sep 2009, Hugh Dickins wrote:

    > Is it perhaps the case that some UNIX on ia64 does implement MAP_GROWSUP,
    > and these numbers in the Linux ia64 mman.h have been chosen to match that
    > reference implementation? Tony will know. But I wonder if you'd do
    > better at least to leave a MAP_GROWSUP comment on that line, so that
    > somebody doesn't go and reuse the empty slot later on.
    >

    Reserving the bit from future use by adding a comment may be helpful, but
    then let's do it for MAP_GROWSDOWN too.


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