linux-kernel - Re: [PATCH V2] LoongArch: Provide kernel fpu functions

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Date:   Mon, 20 Mar 2023 06:48:06 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     WANG Xuerui <kernel@...0n.name>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>,
        Huacai Chen <chenhuacai@...nel.org>, 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 V2] LoongArch: Provide kernel fpu functions

On Sat, Mar 11, 2023 at 04:10:44PM +0800, WANG Xuerui wrote:
> again, and making the loongarch FPU helpers GPL-only works for me. However
> there's probably another question that Ruoyao pointed out: do we want to
> mark the neon/altivec/s390x helpers GPL-only right away? IMO this particular
> feature is not inherently arch-specific (the same would have to happen for
> every arch with optionally enabled extra state and instructions, not limited
> to FPU actually) so availability of such feature should preferably be made
> symmetric over arches.

In general we should, and all new code most.  For existing code please
contact the relevant maintainers first.