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Date:   Mon, 8 Jul 2019 15:47:35 +1000
From:   Aleksa Sarai <cyphar@cyphar.com>
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     Al Viro <viro@zeniv.linux.org.uk>,
        Jeff Layton <jlayton@kernel.org>,
        "J. Bruce Fields" <bfields@fieldses.org>,
        Arnd Bergmann <arnd@arndb.de>,
        David Howells <dhowells@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        Eric Biederman <ebiederm@xmission.com>,
        Andy Lutomirski <luto@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Jann Horn <jannh@google.com>,
        Christian Brauner <christian@brauner.io>,
        Tycho Andersen <tycho@tycho.ws>,
        David Drysdale <drysdale@google.com>,
        Chanho Min <chanho.min@lge.com>,
        Oleg Nesterov <oleg@redhat.com>, Aleksa Sarai <asarai@suse.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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Subject: Re: [PATCH v9 10/10] selftests: add openat2(2) selftests
Message-ID: <20190708054735.3fepxxtolqaqwmrp@yavin>
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 <878st9iax4.fsf@concordia.ellerman.id.au>
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On 2019-07-08, Michael Ellerman <mpe@ellerman.id.au> wrote:
> Aleksa Sarai <cyphar@cyphar.com> writes:
> > diff --git a/tools/testing/selftests/openat2/Makefile b/tools/testing/s=
elftests/openat2/Makefile
> > new file mode 100644
> > index 000000000000..8235a49928f6
> > --- /dev/null
> > +++ b/tools/testing/selftests/openat2/Makefile
> > @@ -0,0 +1,12 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +CFLAGS +=3D -Wall -O2 -g
> > +TEST_GEN_PROGS :=3D linkmode_test resolve_test rename_attack_test
> > +
> > +include ../lib.mk
> > +
> > +$(OUTPUT)/linkmode_test: linkmode_test.c helpers.o
> > +$(OUTPUT)/rename_attack_test: rename_attack_test.c helpers.o
> > +$(OUTPUT)/resolve_test: resolve_test.c helpers.o
>=20
> You don't need to tell make that foo depends on foo.c.
>=20
> Also if you make the dependency be on helpers.c then you won't get an
> intermediate helpers.o, and then you don't need to clean it.
>=20
> So the above three lines could just be:
>=20
> $(TEST_GEN_PROGS): helpers.c

I had some trouble getting this to work (hence why I went with the
version in the patch), but it looks like this works. I'll include it in
the next set.

> > +EXTRA_CLEAN =3D helpers.o $(wildcard /tmp/ksft-openat2-*)
>=20
> If you follow my advice above you don't need helpers.o in there.
>=20
> Deleting things from /tmp is also a bit fishy on shared machines, ie. it
> will error if those files happen to be owned by another user.

Good point. I'll drop that hunk in the next set.

Thanks!

--=20
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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