linux-kernel - Re: [PATCH v10 05/16] riscv: Add has_vector/riscv

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Message-ID: <d3dc1dac-a17a-4e5d-2584-88bd7645ac1d@rivosinc.com>
Date:   Tue, 8 Nov 2022 09:25:47 -0800
From:   Vineet Gupta <vineetg@...osinc.com>
To:     Christoph Hellwig <hch@...radead.org>,
        Greentime Hu <greentime.hu@...ive.com>
Cc:     palmer@...belt.com, paul.walmsley@...ive.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        aou@...s.berkeley.edu,
        Björn Töpel <bjorn@...nel.org>,
        Guo Ren <guoren@...nel.org>,
        Conor Dooley <Conor.Dooley@...rochip.com>
Subject: Re: [PATCH v10 05/16] riscv: Add has_vector/riscv_vsize to save
 vector features.

On 5/15/22 23:47, Christoph Hellwig wrote:
> On Wed, May 11, 2022 at 08:31:15AM +0000, Greentime Hu wrote:
>> +#ifdef CONFIG_VECTOR
>> +#include <asm/vector.h>
>> +EXPORT_SYMBOL(rvv_enable);
>> +EXPORT_SYMBOL(rvv_disable);
>> +#endif
> 
> As far as I can tell these are not used by any modular code, just by
> the later added kernel mode vector enable helpers.
> 
> Even if they were used this would need to be EXPORT_SYMBOL_GPL.

In the new version, I've made them static inline given the size and 
frequency of them being called. So this becomes moot.

> 
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (C) 2012 Regents of the University of California
>> + * Copyright (C) 2017 SiFive
>> + * Copyright (C) 2019 Alibaba Group Holding Limited
>> + *
>> + *   This program is free software; you can redistribute it and/or
>> + *   modify it under the terms of the GNU General Public License
>> + *   as published by the Free Software Foundation, version 2.
>> + *
>> + *   This program is distributed in the hope that it will be useful,
>> + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + *   GNU General Public License for more details.
>> + */
> 
> No need for all the GPL boilerplate text when you have an SPDX tag.

OK.