linux-kernel - Re: [PATCH 2/8] selftests/vm: use a common gup

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Date:   Tue, 29 Sep 2020 16:08:16 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     John Hubbard <jhubbard@...dia.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>,
        Jérôme Glisse <jglisse@...hat.com>,
        Ralph Campbell <rcampbell@...dia.com>,
        Shuah Khan <shuah@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH 2/8] selftests/vm: use a common gup_test.h

On Tue, Sep 29, 2020 at 11:59:55AM -0700, John Hubbard wrote:
> On 9/29/20 10:55 AM, Jason Gunthorpe wrote:
> > On Tue, Sep 29, 2020 at 10:44:31AM -0700, John Hubbard wrote:
> > > On 9/29/20 9:35 AM, Jason Gunthorpe wrote:
> > > > On Mon, Sep 28, 2020 at 01:10:24PM -0700, John Hubbard wrote:
> > > > > On 9/28/20 5:57 AM, Jason Gunthorpe wrote:
> > > > > > On Sun, Sep 27, 2020 at 11:21:53PM -0700, John Hubbard wrote:
> ...
> > > I don't see any "gcc -m" type of dependency generation pass happening
> > > in this relatively simple Make system.
> > 
> > It happens with -MD, all the deps are stored in files like mm/.init-mm.o.cmd
> > and sucked into the build.
> 
> You are thinking of kbuild. This is not kbuild. There are no such artifacts
> being generated.

Oh. Really? That's horrible.

Jason