linux-kernel - Re: [PATCH] riscv: mm: init: Consolidate vars, functions

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Date:   Sat, 29 May 2021 14:09:25 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     jszhang3@...l.ustc.edu.cn
CC:     alex@...ti.fr, Paul Walmsley <paul.walmsley@...ive.com>,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject:     Re: [PATCH] riscv: mm: init: Consolidate vars, functions

On Mon, 17 May 2021 07:40:01 PDT (-0700), jszhang3@...l.ustc.edu.cn wrote:
> On Sun, 16 May 2021 21:10:48 +0200
> Alex Ghiti <alex@...ti.fr> wrote:
>
>> Hi Jisheng,
>>
>> On 16/05/2021 15:19, Jisheng Zhang wrote:
>> > On Sun, 16 May 2021 21:15:56 +0800 Jisheng Zhang  wrote:
>> >
>> >> From: Jisheng Zhang <jszhang@...nel.org>
>> >>
>> >> Consolidate the following items in init.c
>> >>
>> >> Staticize global vars as much as possible;
>> >> Add __initdata mark if the global var isn't needed after init
>> >> Add __init mark if the func isn't needed after init
>> >> Add __ro_after_init if the global var is read only after init
>> >
>> > Hi Alexandre,
>> >
>> > I think kernel_virt_addr can be removed, users can directly use
>> > the KERNEL_LINK_ADDR MACRO. Maybe I miss the reason of intrducing
>> > it in commit 2bfc6cd81bd17e43 ("riscv: Move kernel mapping outside of
>> > linear mapping"), could you please comment?
>> >
>> > Thanks in advance
>>
>> kernel_virt_addr will be used when I push my relocatable series since
>> then, the kernel virtual address will be different from
>> KERNEL_LINK_ADDR. I agree this was not needed in 2bfc6cd81bd17e43
>> ("riscv: Move kernel mapping outside of linear mapping"), I'm a bit late
>> in pushing the relocatable series.
>>
>
> Thanks for your information. I think kernel_virt_addr could be __ro_after_init
> But I will keep it unchanged until your relocatable series.

Thanks, this is on for-next.