linux-kernel - Re: [PATCH] LoongArch: Provide kernel fpu functions

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Message-ID: <CAAhV-H7vv+AE-7kDf7YpU6_f_dTNxKKoRSHC6vA4aBHOVyMRAQ@mail.gmail.com>
Date:   Mon, 6 Mar 2023 09:55:27 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Xi Ruoyao <xry111@...111.site>
Cc:     WANG Xuerui <kernel@...0n.name>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>, loongarch@...ts.linux.dev,
        linux-arch@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-kernel@...r.kernel.org, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH] LoongArch: Provide kernel fpu functions

On Sun, Mar 5, 2023 at 9:28 PM Xi Ruoyao <xry111@...111.site> wrote:
>
> On Sun, 2023-03-05 at 20:18 +0800, Huacai Chen wrote:
> > > Might be good to provide some explanation in the commit message as to
> > > why the pair of helpers should be GPL-only. Do they touch state buried
> > > deep enough to make any downstream user a "derivative work"? Or are the
> > > annotation inspired by arch/x86?
> > Yes, just inspired by arch/x86, and I don't think these symbols should
> > be used by non-GPL modules.
>
> Hmm, what if one of your partners wish to provide a proprietary GPU
> driver using the FPU like this way?  As a FLOSS developer I'd say "don't
> do that, make your driver GPL".  But for Loongson there may be a
> commercial issue.
So use EXPORT_SYMBOL can make life easier?

Huacai
> --
> Xi Ruoyao <xry111@...111.site>
> School of Aerospace Science and Technology, Xidian University