linux-kernel - Re: [PATCH] kbuild: allow symbol whitelisting with TRIM_UNUSED

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Date:   Wed, 29 Jan 2020 12:42:20 -0500 (EST)
From:   Nicolas Pitre <nico@...xnic.net>
To:     Quentin Perret <qperret@...gle.com>
cc:     masahiroy@...nel.org, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org, maennich@...gle.com,
        kernel-team@...roid.com
Subject: Re: [PATCH] kbuild: allow symbol whitelisting with
 TRIM_UNUSED_KSYMS

On Wed, 29 Jan 2020, Quentin Perret wrote:

> On Wednesday 29 Jan 2020 at 12:11:12 (-0500), Nicolas Pitre wrote:
> > This way, if $CONFIG_UNUSED_KSYMS_WHITELIST is non empty, it'll get 
> > quoted.
> 
> A shorter alternative would be something a little like so perhaps ?
> 
> diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
> index 1a6f7f377230..8e1b7f70e800 100755
> --- a/scripts/adjust_autoksyms.sh
> +++ b/scripts/adjust_autoksyms.sh
> @@ -48,7 +48,7 @@ cat > "$new_ksyms_file" << EOT
>  EOT
>  sed 's/ko$/mod/' modules.order |
>  xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
> -cat - $CONFIG_UNUSED_KSYMS_WHITELIST |
> +cat - "${CONFIG_UNUSED_KSYMS_WHITELIST:-/dev/null}" |

That's even better.


Nicolas