linux-kernel - Re: [PATCH] kunit: Fix kunit.py run --build

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Date:   Tue, 31 Mar 2020 16:38:30 -0300
From:   Vitor Massaru Iha <vitor@...saru.org>
To:     Brendan Higgins <brendanhiggins@...gle.com>
Cc:     KUnit Development <kunit-dev@...glegroups.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] kunit: Fix kunit.py run --build_dir='<foo>' fails on
 "unclean" trees

Hi Brendan,

On Tue, Mar 31, 2020 at 3:27 PM 'Brendan Higgins' via KUnit
Development <kunit-dev@...glegroups.com> wrote:
>
> On Mon, Mar 30, 2020 at 4:03 PM Vitor Massaru Iha <vitor@...saru.org> wrote:
> >
> > Fix this bug: https://bugzilla.kernel.org/show_bug.cgi?id=205219
> >
> > For some reason, the environment variable ARCH is used instead of ARCH
> > passed as an argument, this patch uses a copy of the env, but using
> > ARCH=um and CROSS_COMPILER='' to avoid this problem.
> >
> > This patch doesn't change the user's environment variables, avoiding
> > side effects.
>
> Seems reasonable to me.

There are other problems here, I'll fix it.

>
> > Signed-off-by: Vitor Massaru Iha <vitor@...saru.org>
>
> I cannot test this as your patch doesn't apply to our for-next branch
> (kselftest/kunit). You can find it here:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/log/?h=kunit
>
> > ---
> >  tools/testing/kunit/kunit_kernel.py | 12 +++++++-----
> >  1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
> > index d99ae75ef72f..0cb1f81ac8f2 100644
> > --- a/tools/testing/kunit/kunit_kernel.py
> > +++ b/tools/testing/kunit/kunit_kernel.py
> > @@ -15,6 +15,7 @@ import kunit_config
> >
> >  KCONFIG_PATH = '.config'
> >  kunitconfig_path = '.kunitconfig'
> > +env = dict(os.environ.copy(), ARCH='um', CROSS_COMPILE='')
> >
> >  class ConfigError(Exception):
> >         """Represents an error trying to configure the Linux kernel."""
> > @@ -36,22 +37,22 @@ class LinuxSourceTreeOperations(object):
> >                         raise ConfigError(e.output)
> >
> >         def make_olddefconfig(self, build_dir):
> > -               command = ['make', 'ARCH=um', 'olddefconfig']
> > +               command = ['make', 'olddefconfig']
> >                 if build_dir:
> >                         command += ['O=' + build_dir]
> >                 try:
> > -                       subprocess.check_output(command)
> > +                       subprocess.check_output(command, env=env)
> >                 except OSError as e:
> >                         raise ConfigError('Could not call make command: ' + e)
> >                 except subprocess.CalledProcessError as e:
> >                         raise ConfigError(e.output)
> >
> >         def make(self, jobs, build_dir):
> > -               command = ['make', 'ARCH=um', '--jobs=' + str(jobs)]
> > +               command = ['make', '--jobs=' + str(jobs)]
> >                 if build_dir:
> >                         command += ['O=' + build_dir]
> >                 try:
> > -                       subprocess.check_output(command)
> > +                       subprocess.check_output(command, env=env)
> >                 except OSError as e:
> >                         raise BuildError('Could not call execute make: ' + e)
> >                 except subprocess.CalledProcessError as e:
> > @@ -66,7 +67,8 @@ class LinuxSourceTreeOperations(object):
> >                         [linux_bin] + params,
> >                         stdin=subprocess.PIPE,
> >                         stdout=subprocess.PIPE,
> > -                       stderr=subprocess.PIPE)
> > +                       stderr=subprocess.PIPE,
> > +                       env=env)
> >                 process.wait(timeout=timeout)
> >                 return process
> >
> > --
> > 2.21.1
> >
>
> --
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