linux-kernel - Re: [PATCH] scripts: Add intended executable mode and SPDX license

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Message-ID: <alpine.DEB.2.21.2008310714560.8556@felia>
Date:   Mon, 31 Aug 2020 07:45:25 +0200 (CEST)
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>, keescook@...omium.org
cc:     Mrinal Pandey <mrinalmni@...il.com>, skhan@...uxfoundation.org,
        Linux-kernel-mentees@...ts.linuxfoundation.org,
        lukas.bulwahn@...il.com, re.emese@...il.com, maennich@...gle.com,
        tglx@...utronix.de, gregkh@...uxfoundation.org,
        kernel-hardening@...ts.openwall.com, linux-kernel@...r.kernel.org,
        linux-spdx@...r.kernel.org
Subject: Re: [PATCH] scripts: Add intended executable mode and SPDX license

On Sun, 30 Aug 2020, Andrew Morton wrote:

> On Thu, 27 Aug 2020 14:54:05 +0530 Mrinal Pandey <mrinalmni@...il.com> wrote:
> 
> > commit b72231eb7084 ("scripts: add spdxcheck.py self test") added the file
> > spdxcheck-test.sh to the repository without the executable flag and license
> > information.
> 
> The x bit shouldn't matter.
> 
> If someone downloads and applies patch-5.9.xz (which is a supported way
> of obtaining a kernel) then patch(1) will erase the x bit anyway.
>

Andrew, Kees,

thanks for the feedback.

As his mentor, I see two valuable tasks for Mrinal to work on:

1. Document this knowledge how scripts should be called, not relying on 
the executable bit, probably best somewhere here:
./Documentation/kbuild/makefiles.rst, a new section on using dedicated 
scripts in chapter 3 ("The  kbuild files").

https://www.kernel.org/doc/html/latest/kbuild/makefiles.html#the-kbuild-files

2. Determine if there are places in the build Makefiles that do rely on 
the executable bit and fix those script invocations. (Kees' idea of remove 
all executable bits and see...)

Lukas