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    SubjectRe: [PATCH 00/16] mm: prepare for converting vm->vm_flags to 64-bit
    On Wed, 21 Mar 2012 17:16:06 +0400
    Konstantin Khlebnikov <khlebnikov@openvz.org> wrote:

    > Minchan Kim wrote:
    > > Hi Konstantin,
    > >
    > > It seems to be nice clean up to me and you are a volunteer we have been wanted
    > > for a long time. Thanks!
    > > I am one of people who really want to expand vm_flags to 64 bit but when KOSAKI
    > > tried it, Linus said his concerning, I guess you already saw that.
    > >
    > > He want to tidy vm_flags's usage up rather than expanding it.
    > > Without the discussion about that, just expanding vm_flags would make us use
    > > it up easily so that we might need more space.
    >
    > Strictly speaking, my pachset does not expands vm_flags, it just prepares to this.
    > Anyway vm_flags_t looks better than hard-coded "unsigned long" and messy type-casts around it.

    It would be nice to find some way of triggering compiler warnings or
    sparse warnings if someone mixes a 32-bit type with a vm_flags_t. Any
    thoughts on this?

    (Maybe that's what __nocast does, but Documentation/sparse.txt doesn't
    describe it)


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