linux-kernel - Re: [PATCH v4 1/3] kbuild: allow symbol whitelisting with TRIM_UNUSED

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Message-ID: <20200217163540.GD48466@google.com>
Date:   Mon, 17 Feb 2020 16:35:40 +0000
From:   Matthias Maennich <maennich@...gle.com>
To:     Nicolas Pitre <nico@...xnic.net>
Cc:     Quentin Perret <qperret@...gle.com>, masahiroy@...nel.org,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        kernel-team@...roid.com, jeyu@...nel.org, hch@...radead.org
Subject: Re: [PATCH v4 1/3] kbuild: allow symbol whitelisting with
 TRIM_UNUSED_KSYMS

On Mon, Feb 17, 2020 at 11:00:39AM -0500, Nicolas Pitre wrote:
>On Mon, 17 Feb 2020, Quentin Perret wrote:
>
>> On Monday 17 Feb 2020 at 15:22:01 (+0000), Matthias Maennich wrote:
>> > In case the whitelist file can't be found, the error message is
>> >
>> >  cat: path/to/file: file not found
>> >
>> > I wonder whether we can make this error message a bit more specific by
>> > telling the user that the KSYMS_WHITELIST is missing.
>>
>> +1, that'd be really useful. I'll check the file existence in v5 (in a
>> POSIX-compliant way, I promise).
>
>In fact, if you explicitly provide a file that is not there, then this
>is arguably a good reason to even fail the build.

I agree, I would expect the build to fail in that case.

Cheers,
Matthias

>
>
>Nicolas