linux-kernel - Re: [PATCH] kconfig: Add findconf script and helper program

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Message-ID: <YqFtHfC59akYP9jB@hatter.bewilderbeest.net>
Date:   Wed, 8 Jun 2022 20:46:37 -0700
From:   Zev Weiss <zev@...ilderbeest.net>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: Add findconf script and helper program

On Wed, Jun 08, 2022 at 07:48:44PM PDT, Randy Dunlap wrote:
>Hi--
>
>On 6/8/22 02:54, Zev Weiss wrote:
>> scripts/findconf provides menuconfig's search functionality as a
>> standalone, non-interactive command, somewhat in the spirit of
>> scripts/config.  It is meant to be useful for tasks like getting a
>> quick overview of symbol dependencies or determining which Kconfig
>> file to edit for a given symbol, without having to fire up one of the
>> interactive config programs.
>>
>> It accepts a single command-line flag, '-v', which causes it to also
>> print the help text of each matching result.
>>
>> Signed-off-by: Zev Weiss <zev@...ilderbeest.net>
>> ---
>
>I can see how this could be useful.
>It's a little easier to use than what I currently do:
>
>$ findconfig  DRM_HISI_HIBMC
>./drivers/gpu/drm/hisilicon/hibmc/Kconfig:2:config DRM_HISI_HIBMC

I'm guessing 'findconfig' here is some personal shell 
alias/function/script?  (I can't see any references to it in the kernel 
source tree.)

>
>then $EDITOR that_Kconfig_file
>
>
>In testing, I am seeing this:
>
>#
># using defaults found in /boot/config-5.3.18-150300.59.63-default
>#
>.config:421:warning: symbol value 'm' invalid for I8K
>.config:2335:warning: symbol value 'm' invalid for MTD_NAND_ECC_SW_HAMMING
>.config:2484:warning: symbol value 'm' invalid for PVPANIC
>.config:8671:warning: symbol value 'm' invalid for INTERCONNECT
>.config:9369:warning: symbol value 'm' invalid for CRYPTO_ARCH_HAVE_LIB_BLAKE2S
>.config:9370:warning: symbol value 'm' invalid for CRYPTO_LIB_BLAKE2S_GENERIC
>.config:9653:warning: symbol value '1' invalid for KASAN_STACK
>

This I assume is just due to the contents of your .config file relative 
to the current Kconfig definitions and not a problem with anything in 
this patch?

>How do I specify/choose a .config file to be used?
>
>Oh, use KCONFIG_CONFIG=filename
>

Ah, I guess that'd be a nice thing to add a flag for to the wrapper 
script -- I'll include that in v2.

>
>Please update (add) usage/help text in scripts/kconfig/Makefile.
>

Ack, will do.


Thanks for the review!


Zev