From: Ulf Magnusson <ulfalizer@gmail.com>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
Randy Dunlap <rdunlap@infradead.org>,
Sam Ravnborg <sam@ravnborg.org>,
Michal Marek <michal.lkml@markovi.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 04/23] kconfig: set SYMBOL_AUTO to the symbol marked with defconfig_list
Date: Thu, 1 Mar 2018 18:11:47 +0100 [thread overview]
Message-ID: <CAFkk2KQaOF3UijN5164G9wyJnym6QHoGSPKMtB8jsS9FRtRdAQ@mail.gmail.com> (raw)
In-Reply-To: <CAK7LNARjgqCbTO7x_8kzzfCdU6HWNyFLNZzwfU2hYRZmWHT_kw@mail.gmail.com>
On Thu, Mar 1, 2018 at 4:05 PM, Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
> 2018-02-17 3:38 GMT+09:00 Masahiro Yamada <yamada.masahiro@socionext.com>:
>> The 'defconfig_list' is a weird attribute. If the '.config' is
>> missing, conf_read_simple() iterates over all visible defaults,
>> then it uses the first one for which fopen() succeeds.
>>
>> config DEFCONFIG_LIST
>> string
>> depends on !UML
>> option defconfig_list
>> default "/lib/modules/$UNAME_RELEASE/.config"
>> default "/etc/kernel-config"
>> default "/boot/config-$UNAME_RELEASE"
>> default "$ARCH_DEFCONFIG"
>> default "arch/$ARCH/defconfig"
>>
>> However, like other symbols, the first visible default is always
>> written out to the .config file. This might be different from what
>> has been actually used.
>>
>> For example, on my machine, the third one "/boot/config-$UNAME_RELEASE"
>> is opened, like follows:
>>
>> $ rm .config
>> $ make oldconfig 2>/dev/null
>> scripts/kconfig/conf --oldconfig Kconfig
>> #
>> # using defaults found in /boot/config-4.4.0-112-generic
>> #
>> *
>> * Restart config...
>> *
>> *
>> * IRQ subsystem
>> *
>> Expose irq internals in debugfs (GENERIC_IRQ_DEBUGFS) [N/y/?] (NEW)
>>
>> However, the resulted .config file contains the first one since it is
>> visible:
>>
>> $ grep CONFIG_DEFCONFIG_LIST .config
>> CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
>>
>> In order to stop confusing people, prevent this CONFIG option from
>> being written to the .config file.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
>> ---
>
>
> This one is almost trivial, so I will pick it up now.
>
> Ulf, do you have any comment about this one?
>
>
>
>
>> I'd like to fix the root case of this weirdness later.
>> (and other 'option' attributes as well)
>>
>> But, this series is focusing a more important work in a bigger picture.
>>
>> For now, I decided to just hide CONFIG_DEFCONFIG_LIST
>> from the .config file.
>>
>>
>> scripts/kconfig/menu.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
>> index 9922285..36cd3e1 100644
>> --- a/scripts/kconfig/menu.c
>> +++ b/scripts/kconfig/menu.c
>> @@ -212,6 +212,7 @@ void menu_add_option(int token, char *arg)
>> sym_defconfig_list = current_entry->sym;
>> else if (sym_defconfig_list != current_entry->sym)
>> zconf_error("trying to redefine defconfig symbol");
>> + sym_defconfig_list->flags |= SYMBOL_AUTO;
>> break;
>> case T_OPT_ENV:
>> prop_add_env(arg);
>> --
>> 2.7.4
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
>
> --
> Best Regards
> Masahiro Yamada
Seems reasonable to me.
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Cheers,
Ulf
next prev parent reply other threads:[~2018-03-01 17:11 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-16 18:38 [PATCH 00/23] kconfig: move compiler capability tests to Kconfig Masahiro Yamada
2018-02-16 18:38 ` [PATCH 01/23] kbuild: remove kbuild cache Masahiro Yamada
2018-02-16 18:38 ` [PATCH 02/23] kbuild: remove CONFIG_CROSS_COMPILE support Masahiro Yamada
2018-02-16 18:38 ` [PATCH 03/23] kconfig: add xstrdup() helper Masahiro Yamada
2018-03-01 15:02 ` Masahiro Yamada
2018-02-16 18:38 ` [PATCH 04/23] kconfig: set SYMBOL_AUTO to the symbol marked with defconfig_list Masahiro Yamada
2018-03-01 15:05 ` Masahiro Yamada
2018-03-01 17:11 ` Ulf Magnusson [this message]
2018-02-16 18:38 ` [PATCH 05/23] kconfig: move and rename sym_expand_string_value() Masahiro Yamada
2018-02-16 18:38 ` [PATCH 06/23] kconfig: reference environments directly and remove 'option env=' syntax Masahiro Yamada
2018-02-18 11:15 ` Ulf Magnusson
2018-02-16 18:38 ` [PATCH 07/23] kconfig: add function support and implement 'shell' function Masahiro Yamada
2018-02-17 16:16 ` Ulf Magnusson
2018-02-19 15:57 ` Masahiro Yamada
2018-02-19 17:50 ` Ulf Magnusson
2018-02-19 20:06 ` Ulf Magnusson
2018-02-19 22:06 ` Ulf Magnusson
2018-02-16 18:38 ` [PATCH 08/23] kconfig: add 'macro' keyword to support user-defined function Masahiro Yamada
2018-02-16 19:49 ` Nicolas Pitre
2018-02-16 23:51 ` Ulf Magnusson
2018-02-17 2:30 ` Nicolas Pitre
2018-02-17 4:29 ` Ulf Magnusson
2018-02-17 4:44 ` Nicolas Pitre
2018-02-17 6:06 ` Ulf Magnusson
2018-02-16 18:38 ` [PATCH 09/23] kconfig: add 'cc-option' macro Masahiro Yamada
2018-02-16 18:38 ` [PATCH 10/23] stack-protector: test compiler capability in Kconfig and drop AUTO mode Masahiro Yamada
2018-02-21 4:39 ` Masahiro Yamada
2018-02-16 18:38 ` [PATCH 11/23] kconfig: add 'shell-stdout' function Masahiro Yamada
2018-02-16 19:17 ` Linus Torvalds
2018-02-19 4:48 ` Ulf Magnusson
2018-02-19 17:44 ` Linus Torvalds
2018-02-19 18:01 ` Linus Torvalds
2018-02-19 18:54 ` Ulf Magnusson
2018-02-21 4:59 ` Masahiro Yamada
2018-02-21 16:41 ` Ulf Magnusson
2018-02-21 17:01 ` Linus Torvalds
2018-02-16 18:38 ` [PATCH 12/23] kconfig: replace $UNAME_RELEASE with function call Masahiro Yamada
2018-02-16 18:38 ` [PATCH 13/23] kconfig: expand environments/functions in (main)menu, comment, prompt Masahiro Yamada
2018-02-16 18:38 ` [PATCH 14/23] kconfig: show compiler version text in the top comment Masahiro Yamada
2018-02-16 18:38 ` [PATCH 15/23] kconfig: add CC_IS_GCC and GCC_VERSION Masahiro Yamada
2018-02-16 18:38 ` [PATCH 16/23] kbuild: add clang-version.sh Masahiro Yamada
2018-02-16 18:38 ` [PATCH 17/23] kconfig: add CC_IS_CLANG and CLANG_VERSION Masahiro Yamada
2018-02-16 18:38 ` [PATCH 18/23] gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT Masahiro Yamada
2018-02-16 18:38 ` [PATCH 19/23] kcov: imply GCC_PLUGINS and GCC_PLUGIN_SANCOV instead of select'ing them Masahiro Yamada
2018-02-16 18:38 ` [PATCH 20/23] gcc-plugins: always build plugins with C++ Masahiro Yamada
2018-02-22 18:45 ` Emese Revfy
2018-02-23 12:37 ` Masahiro Yamada
2018-02-16 18:38 ` [PATCH 21/23] gcc-plugins: move GCC version check for PowerPC to Kconfig Masahiro Yamada
2018-02-22 5:04 ` Andrew Donnellan
2018-02-16 18:38 ` [PATCH 22/23] gcc-plugins: test GCC plugin support in Kconfig Masahiro Yamada
2018-02-16 18:38 ` [PATCH 23/23] gcc-plugins: enable GCC_PLUGINS for COMPILE_TEST Masahiro Yamada
2018-02-18 22:13 ` [PATCH 00/23] kconfig: move compiler capability tests to Kconfig Sam Ravnborg
2018-02-19 15:18 ` Ulf Magnusson
2018-02-21 7:38 ` Masahiro Yamada
2018-02-21 9:56 ` Arnd Bergmann
2018-02-21 10:20 ` Masahiro Yamada
2018-02-21 10:52 ` Arnd Bergmann
2018-02-21 12:57 ` Masahiro Yamada
2018-02-21 16:03 ` Arnd Bergmann
2018-02-21 21:39 ` Ulf Magnusson
2018-03-02 5:50 ` Masahiro Yamada
2018-03-02 9:03 ` Ulf Magnusson
2018-03-02 9:12 ` Ulf Magnusson
2018-02-22 3:22 ` Michael Ellerman
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