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Date: Thu, 8 Aug 2019 11:32:03 +0800
From: Jason Yan <yanaijie@...wei.com>
To: Michael Ellerman <mpe@...erman.id.au>, <linuxppc-dev@...ts.ozlabs.org>,
	<diana.craciun@....com>, <christophe.leroy@....fr>,
	<benh@...nel.crashing.org>, <paulus@...ba.org>, <npiggin@...il.com>,
	<keescook@...omium.org>, <kernel-hardening@...ts.openwall.com>
CC: <linux-kernel@...r.kernel.org>, <wangkefeng.wang@...wei.com>,
	<yebin10@...wei.com>, <thunder.leizhen@...wei.com>,
	<jingxiangfeng@...wei.com>, <fanchengyang@...wei.com>,
	<zhaohongjiang@...wei.com>
Subject: Re: [PATCH v5 02/10] powerpc: move memstart_addr and kernstart_addr
 to init-common.c



On 2019/8/7 21:02, Michael Ellerman wrote:
> Jason Yan <yanaijie@...wei.com> writes:
>> These two variables are both defined in init_32.c and init_64.c. Move
>> them to init-common.c.
>>
>> Signed-off-by: Jason Yan <yanaijie@...wei.com>
>> Cc: Diana Craciun <diana.craciun@....com>
>> Cc: Michael Ellerman <mpe@...erman.id.au>
>> Cc: Christophe Leroy <christophe.leroy@....fr>
>> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
>> Cc: Paul Mackerras <paulus@...ba.org>
>> Cc: Nicholas Piggin <npiggin@...il.com>
>> Cc: Kees Cook <keescook@...omium.org>
>> Reviewed-by: Christophe Leroy <christophe.leroy@....fr>
>> Reviewed-by: Diana Craciun <diana.craciun@....com>
>> Tested-by: Diana Craciun <diana.craciun@....com>
>> ---
>>   arch/powerpc/mm/init-common.c | 5 +++++
>>   arch/powerpc/mm/init_32.c     | 5 -----
>>   arch/powerpc/mm/init_64.c     | 5 -----
>>   3 files changed, 5 insertions(+), 10 deletions(-)
>>
>> diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
>> index a84da92920f7..152ae0d21435 100644
>> --- a/arch/powerpc/mm/init-common.c
>> +++ b/arch/powerpc/mm/init-common.c
>> @@ -21,6 +21,11 @@
>>   #include <asm/pgtable.h>
>>   #include <asm/kup.h>
>>   
>> +phys_addr_t memstart_addr = (phys_addr_t)~0ull;
>> +EXPORT_SYMBOL_GPL(memstart_addr);
>> +phys_addr_t kernstart_addr;
>> +EXPORT_SYMBOL_GPL(kernstart_addr);
> 
> Would be nice if these can be __ro_after_init ?
> 

Good idea.

> cheers
> 
> .
> 

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