linux-kernel - Re: [PATCH v3 resend 11/15] powerpc: convert to setup_initial_init

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Message-ID: <215985fd-67d5-731f-743c-ea446b55bb8d@csgroup.eu>
Date:   Tue, 8 Jun 2021 16:54:09 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Souptick Joarder <jrdr.linux@...il.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     linux-kernel@...r.kernel.org, Linux-MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3 resend 11/15] powerpc: convert to
 setup_initial_init_mm()



Le 08/06/2021 à 16:36, Souptick Joarder a écrit :
> On Tue, Jun 8, 2021 at 1:56 PM Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>>
>> Use setup_initial_init_mm() helper to simplify code.
>>
>> Note klimit is (unsigned long) _end, with new helper,
>> will use _end directly.
> 
> With this change klimit left with no user in this file and can be
> moved to some appropriate header.
> But in a separate series.

I have a patch to remove klimit, see 
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/9fa9ba6807c17f93f35a582c199c646c4a8bfd9c.1622800638.git.christophe.leroy@csgroup.eu/

Christophe


> 
>>
>> Cc: Michael Ellerman <mpe@...erman.id.au>
>> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
>> Cc: linuxppc-dev@...ts.ozlabs.org
>> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
>> ---
>>   arch/powerpc/kernel/setup-common.c | 5 +----
>>   1 file changed, 1 insertion(+), 4 deletions(-)
>>
>> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
>> index 74a98fff2c2f..96697c6e1e16 100644
>> --- a/arch/powerpc/kernel/setup-common.c
>> +++ b/arch/powerpc/kernel/setup-common.c
>> @@ -927,10 +927,7 @@ void __init setup_arch(char **cmdline_p)
>>
>>          klp_init_thread_info(&init_task);
>>
>> -       init_mm.start_code = (unsigned long)_stext;
>> -       init_mm.end_code = (unsigned long) _etext;
>> -       init_mm.end_data = (unsigned long) _edata;
>> -       init_mm.brk = klimit;
>> +       setup_initial_init_mm(_stext, _etext, _edata, _end);
>>
>>          mm_iommu_init(&init_mm);
>>          irqstack_early_init();
>> --
>> 2.26.2
>>
>>