linux-kernel - Re: [PATCH v3 0/7] Trim unused exported kernel symbols

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Date:	Wed, 24 Feb 2016 10:19:44 -0500 (EST)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org
cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/7] Trim unused exported kernel symbols


Gentle ping.


On Thu, 18 Feb 2016, Nicolas Pitre wrote:

> This patch series provides the option to omit exported symbols from
> the kernel and modules that are never referenced by any of the selected
> modules in the current kernel configuration.
> 
> The original cover letter with lots of test results can be found here:
> 
>         https://lkml.org/lkml/2016/2/8/813
> 
> A git branch with those patches is also available here:
> 
>         http://git.linaro.org/people/nicolas.pitre/linux.git autoksyms
> 
> Please consider for merging.
> 
> Changes from v2:
> 
> - Generating the build dependencies by parsing the source with fixdep
>   turned out to be unreliable due to all the EXPORT_SYMBOL() variants,
>   and especially their use within macros where the actual symbol name
>   is known only after running the preprocessor. This list of symbol names
>   is now obtained from the preprocessor directly, fixing allmodconfig
>   builds.
> 
> Changes from v1:
> 
> - Replaced "exp" that doesn't convey the right meaning as noted by
>   Sam Ravnborg. The "ksym" identifier is actually what the kernel
>   already uses for this. Therefore:
>   - CONFIG_TRIM_UNUSED_EXPSYMS --> CONFIG_TRIM_UNUSED_KSYMS
>   - include/generated/expsyms.h --> include/generated/autoksyms.h
>   - #define __EXPSYM_* --> #define __KSYM_*
> 
> - Some sed regexp improvements as suggested by Al Viro.
> 
> - Renamed vmlinux_recursive target to autoksyms_recursive.
> 
> - Accept EXPORT_SYMBOL variants with a prefix, e.g. ACPI_EXPORT_SYMBOL.
> 
> - Minor commit log clarifications.
> 
> - Added Rusty's ACK.
> 
>