linux-kernel - Re: [PATCH v2 0/2] Validating UAPI backwards compatibility

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Message-ID: <8cedfaea-b8b5-30a4-969c-205af5193ce6@quicinc.com>
Date:   Wed, 1 Mar 2023 15:35:53 -0800
From:   Trilok Soni <quic_tsoni@...cinc.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>,
        John Moon <quic_johmoo@...cinc.com>
CC:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nicolas Schier <nicolas@...sle.eu>,
        <linux-kbuild@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-arm-msm@...r.kernel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Bjorn Andersson <andersson@...nel.org>,
        Todd Kjos <tkjos@...gle.com>,
        Matthias Maennich <maennich@...gle.com>,
        Giuliano Procida <gprocida@...gle.com>,
        <kernel-team@...roid.com>, <libabigail@...rceware.org>,
        Jordan Crouse <jorcrous@...zon.com>,
        Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>
Subject: Re: [PATCH v2 0/2] Validating UAPI backwards compatibility

On 3/1/2023 3:33 PM, Nick Desaulniers wrote:
> On Wed, Mar 1, 2023 at 2:33 PM John Moon <quic_johmoo@...cinc.com> wrote:
>>
>> With some additional help from Nick offline, we determined that the
>> issue isn't with clang, but with libdw (from elfutils). You need at
>> least libdw version 0.171 for the abidiff tool to work correctly with
>> clang (in this particular case). Ubuntu 18.04 ships with version 0.170.
>>
>> If there's any interest, it'd be fairly easy to add a check for this
>> condition under the check_deps() function in the script.
> 
> Good job John; mind sending a v3 with that addition, and the commit
> message updated?

I would prefer to wait to get more reviews on v2 from Greg/Masahiro and 
then combine above checks in the v3. If there are no comments by next 
Monday then we can send v3, sounds good?

---Trilok Soni