linux-kernel - Re: [PATCH] kbuild: use KBUILD_DEFCONFIG as the fallback for DEFCONFIG

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Message-ID: <20200221092242.GA11448@willie-the-truck>
Date:   Fri, 21 Feb 2020 09:22:43 +0000
From:   Will Deacon <will@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        X86 ML <x86@...nel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        linux-um@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Borislav Petkov <bp@...en8.de>,
        "David S. Miller" <davem@...emloft.net>,
        Greentime Hu <green.hu@...il.com>, Guo Ren <guoren@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jeff Dike <jdike@...toit.com>, Nick Hu <nickhu@...estech.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rich Felker <dalias@...c.org>,
        Richard Weinberger <richard@....at>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincent Chen <deanbo422@...il.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        "open list:SIFIVE DRIVERS" <linux-riscv@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH] kbuild: use KBUILD_DEFCONFIG as the fallback for
 DEFCONFIG_LIST

On Fri, Feb 21, 2020 at 06:18:50PM +0900, Masahiro Yamada wrote:
> On Fri, Feb 21, 2020 at 5:50 PM Marek Szyprowski
> <m.szyprowski@...sung.com> wrote:
> > This patch landed in today's linux-next (next-20200221) and broke arm64
> > builds:
> >
> > --->8---
> >
> > $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
> > *** Default configuration is based on 'defconfig'
> > #
> > # configuration written to .config
> > #
> > $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image.gz
> > scripts/kconfig/conf  --syncconfig Kconfig
> > scripts/kconfig/conf  --syncconfig Kconfig
> > scripts/kconfig/conf  --syncconfig Kconfig
> > scripts/kconfig/conf  --syncconfig Kconfig
> > scripts/kconfig/conf  --syncconfig Kconfig
> > ...
> >
> > (endless loop)
> >
> > --->8---
> >
> > Reverting it fixes the issue:
> 
> 
> 
> My bad.
> 
> This is because arch/arm64/Makefile does not define
> KBUILD_DEFCONFIG.
> 
> 
> 
> I will drop it.
> 
> Sorry about that.

Thanks, Masahiro.

Will