linux-kernel - Re: [PATCH 02/13] riscv: Fixup difference with defconfig

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Date:   Wed, 22 Dec 2021 12:44:13 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Guo Ren <guoren@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Palmer Dabbelt <palmer@...belt.com>,
        Anup Patel <anup.patel@....com>,
        gregkh <gregkh@...uxfoundation.org>,
        liush <liush@...winnertech.com>, Wei Fu <wefu@...hat.com>,
        Drew Fustini <drew@...gleboard.org>,
        Wang Junqiang <wangjunqiang@...as.ac.cn>,
        Wei Wu (吴伟) <lazyparser@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        linux-csky@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH 02/13] riscv: Fixup difference with defconfig

On Wed, Dec 22, 2021 at 12:34 PM Guo Ren <guoren@...nel.org> wrote:
> On Wed, Dec 22, 2021 at 1:09 AM Arnd Bergmann <arnd@...db.de> wrote:
> > On Tue, Dec 21, 2021 at 5:35 PM <guoren@...nel.org> wrote:
> > If the intention is to keep them in sync, maybe use a fragment for 32-bit
> > mode, like powerpc or mips do.
>
> Some people are familiar with "make rv32_defconfig". There has a
> 32-bit.config fragment config in arch/riscv/configs/.
>
> I've tested with:
>
> make ARCH=riscv CROSS_COMPILE=riscv32-buildroot-linux-gnu-
> EXTRA_CFLAGS+=-g O=../build-rv32/ defconfig 32-bit.config
>
> The above is tested Okay, do you mean we should delete rv32_defconfig?
> I think it's another topic, I just want them the same in "compat"
> patchset.

I think what you can do is to add rv32_defconfig as a target in
arch/riscv/Makefile the same way as rv32_randconfig, and then
delete the other file, that will keep the existing process working
for any existing users.

Given that there are no specific rv32 SoC implementations supported
by the kernel today (other than SOC_VIRT), the number of users
would be close to zero anyway.

       Arnd