linux-kernel - Re: [PATCH 05/22] mm: export alloc_pages

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Message-ID: <CAPcyv4jLK2F2UHqbwp4bCEiB7tL8sVsr775egKMmJvfZG+W+NQ@mail.gmail.com>
Date:   Wed, 26 Jun 2019 09:14:32 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Christoph Hellwig <hch@....de>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>, Linux MM <linux-mm@...ck.org>,
        nouveau@...ts.freedesktop.org,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        linux-pci@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/22] mm: export alloc_pages_vma

On Tue, Jun 25, 2019 at 10:46 PM Michal Hocko <mhocko@...nel.org> wrote:
>
> On Tue 25-06-19 12:52:18, Dan Williams wrote:
> [...]
> > > Documentation/process/stable-api-nonsense.rst
> >
> > That document has failed to preclude symbol export fights in the past
> > and there is a reasonable argument to try not to retract functionality
> > that had been previously exported regardless of that document.
>
> Can you point me to any specific example where this would be the case
> for the core kernel symbols please?

The most recent example that comes to mind was the thrash around
__kernel_fpu_{begin,end} [1]. I referenced that when debating _GPL
symbol policy with Jérôme [2].

[1]: https://lore.kernel.org/lkml/20190522100959.GA15390@kroah.com/
[2]: https://lore.kernel.org/lkml/CAPcyv4gb+r==riKFXkVZ7gGdnKe62yBmZ7xOa4uBBByhnK9Tzg@mail.gmail.com/