linux-kernel - Re: cleanup the walk_page

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Message-ID: <20190817064301.GA18544@lst.de>
Date:   Sat, 17 Aug 2019 08:43:01 +0200
From:   Christoph Hellwig <hch@....de>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Hellström <thomas@...pmail.org>,
        Jerome Glisse <jglisse@...hat.com>,
        Steven Price <steven.price@....com>,
        Linux-MM <linux-mm@...ck.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: cleanup the walk_page_range interface

On Sat, Aug 17, 2019 at 04:41:24PM +1000, Stephen Rothwell wrote:
> I certainly prefer that method of API change :-)
> (see the current "keys: Replace uid/gid/perm permissions checking with
> an ACL" in linux-next and the (currently) three merge fixup patches I
> am carrying.  Its not bad when people provide the fixes, but I am no
> expert in most areas of the kernel ...)

It would mean pretty much duplicating all the code.  And then never
finish the migration because new users of the old interfaces keep
popping up.  Compared to that I'd much much prefer either Linus
taking it now or a branch.