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Date:   Wed, 4 Sep 2019 14:24:57 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@sifive.com>
To:     Mao Han <han_mao@c-sky.com>
cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-csky@vger.kernel.org, Greentime Hu <green.hu@gmail.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        Christoph Hellwig <hch@lst.de>, Guo Ren <guoren@kernel.org>
Subject: Re: [PATCH V6 3/3] riscv: Add support for libdw
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References: <cover.1567060834.git.han_mao@c-sky.com> <4cba2dfb6b1ef0df01185c6bce78a0a2867d0a7d.1567060834.git.han_mao@c-sky.com>
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Hello Mao Han,

On Thu, 29 Aug 2019, Mao Han wrote:

> This patch add support for DWARF register mappings and libdw registers
> initialization, which is used by perf callchain analyzing when
> --call-graph=dwarf is given.

> diff --git a/tools/arch/riscv/include/uapi/asm/perf_regs.h b/tools/arch/riscv/include/uapi/asm/perf_regs.h
> new file mode 100644
> index 0000000..df1a581
> --- /dev/null
> +++ b/tools/arch/riscv/include/uapi/asm/perf_regs.h
> @@ -0,0 +1,42 @@
> +/* SPDX-License-Identifier: GPL-2.0 */

As with 

https://lore.kernel.org/linux-riscv/CAJF2gTRXH_bx0rwsTZMTnX+umZfVTL_iVnewPtVM50sLaqJPTg@mail.gmail.com/T/#t

is it possible to change this license string to "GPL-2.0 WITH 
Linux-syscall-note" to match the other Linux architectures? 


- Paul