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Date:   Fri, 6 Oct 2017 05:04:30 +0900
From:   Masahiro Yamada <>
To:     Arnd Bergmann <>
Cc:     Ulf Magnusson <>,
        Linux Kernel Mailing List <>,
        Linux Kbuild mailing list <>,
        "Paul E. McKenney" <>,
        Nicolas Pitre <>,
        Andrew Morton <>,
        Tejun Heo <>,
        Thomas Gleixner <>,
        Kees Cook <>,
        Daniel Mack <>
Subject: Re: [PATCH] kbuild: Fix optimization level choice default

2017-10-04 16:27 GMT+09:00 Arnd Bergmann <>:
> On Wed, Oct 4, 2017 at 1:53 AM, Ulf Magnusson <> wrote:
>> The choice containing the CC_OPTIMIZE_FOR_PERFORMANCE symbol
>> accidentally added a "CONFIG_" prefix when trying to make it the
>> default, selecting an undefined symbol as the default.
>> The mistake is harmless here: Since the default symbol is not visible,
>> the choice falls back on using the visible symbol as the default
>> instead, which is CC_OPTIMIZE_FOR_PERFORMANCE, as intended.
>> A patch that makes Kconfig print a warning in this case has been
>> submitted separately:
>> Signed-off-by: Ulf Magnusson <>
> Acked-by: Arnd Bergmann <>
> --

Applied to linux-kbuild/fixes.  Thanks.

Best Regards
Masahiro Yamada

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