Re: cleanup the walk_page_range interface

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On Thu, Aug 15, 2019 at 11:27:51PM -0700, Christoph Hellwig wrote:
> On Thu, Aug 08, 2019 at 10:50:37AM -0700, Linus Torvalds wrote:
> > On Thu, Aug 8, 2019 at 8:42 AM Christoph Hellwig <hch@xxxxxx> wrote:
> > >
> > > this series is based on a patch from Linus to split the callbacks
> > > passed to walk_page_range and walk_page_vma into a separate structure
> > > that can be marked const, with various cleanups from me on top.
> > 
> > The whole series looks good to me. Ack.
> > 
> > > Note that both Thomas and Steven have series touching this area pending,
> > > and there are a couple consumer in flux too - the hmm tree already
> > > conflicts with this series, and I have potential dma changes on top of
> > > the consumers in Thomas and Steven's series, so we'll probably need a
> > > git tree similar to the hmm one to synchronize these updates.
> > 
> > I'd be willing to just merge this now, if that helps. The conversion
> > is mechanical, and my only slight worry would be that at least for my
> > original patch I didn't build-test the (few) non-x86
> > architecture-specific cases. But I did end up looking at them fairly
> > closely  (basically using some grep/sed scripts to see that the
> > conversions I did matched the same patterns). And your changes look
> > like obvious improvements too where any mistake would have been caught
> > by the compiler.
> > 
> > So I'm not all that worried from a functionality standpoint, and if
> > this will help the next merge window, I'll happily pull now.
> 
> So what is the plan forward?  Probably a little late for 5.3,
> so queue it up in -mm for 5.4 and deal with the conflicts in at least
> hmm?  Queue it up in the hmm tree even if it doesn't 100% fit?

Did we make a decision on this? Due to travel & LPC I'd like to
finalize the hmm tree next week.

Thanks,
Jason





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