linux-kernel - Re: common KUnit Kconfig and file naming (was: Re: [PATCH] lib: kunit_test_overflow: add KUnit test of check_*

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Message-ID: <202006182016.C93BC8AB@keescook>
Date:   Thu, 18 Jun 2020 20:42:01 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Brendan Higgins <brendanhiggins@...gle.com>
Cc:     David Gow <davidgow@...gle.com>,
        Alan Maguire <alan.maguire@...cle.com>,
        Vitor Massaru Iha <vitor@...saru.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: common KUnit Kconfig and file naming (was: Re: [PATCH] lib:
 kunit_test_overflow: add KUnit test of check_*_overflow functions)

On Thu, Jun 18, 2020 at 01:27:55PM -0700, Brendan Higgins wrote:
> I am cool with changing *-test.c to *-kunit.c. The *-test.c was a hold

I am fine with basically any decision as long as there's a single naming
convention, *except* for this part. Dashes in source files creates
confusion for module naming. Separators should be underscores. This is
a standing pet-peeve of mine, and while I certainly can't fix it
universally in the kernel, we can at least avoid creating an entire
subsystem that gets this wrong for all modules. :)

To illustrate:

$ modinfo dvb-bt8xx
filename: .../kernel/drivers/media/pci/bt8xx/dvb-bt8xx.ko
...
name:           dvb_bt8xx
                   ^         does not match the .ko file, nor source.

Primarily my issue is the disconnect between "dmesg" output and finding
the source. It's not like, a huge deal, but it bugs me. :) As in:

$ strings drivers/media/pci/bt8xx/dvb-bt8xx.o | grep 'Init Error'
4dvb_bt8xx: or51211: Init Error - Can't Reset DVR (%i)

All this said, if there really is some good reason to use dashes, I will
get over it. :P

(And now that I've had to say all this "out loud", I wonder if maybe I
could actually fix this all at the root cause: KBUILD_MOD_NAME... it is
sometimes used for identifiers, which is why it does the underscore
replacement... I wonder if it could be split into "name" and
"identifier"...)

-- 
Kees Cook