Messages in this thread | | | Date | Thu, 22 Mar 2012 14:26:47 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 00/16] mm: prepare for converting vm->vm_flags to 64-bit |
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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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