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Date: Mon, 22 Apr 2013 13:08:22 +0800
From: Chen Gang <gang.chen@asianux.com>
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To: Arnd Bergmann <arnd@arndb.de>
CC: Catalin Marinas <Catalin.Marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, Tony Lindgren <tony@atomide.com>,
        "olof@lixom.net" <olof@lixom.net>,
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	<linux-arm-kernel@lists.infradead.org>,
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Subject: Re: [Suggestion] ARM64: kernel: compiling issue, need implement cmpxchg64
 with assembler language.
References: <51712E5E.2020809@asianux.com> <201304191412.54601.arnd@arndb.de> <5171FD67.2080104@asianux.com> <2182812.ymprEm6XBb@wuerfel>
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On 2013年04月20日 15:32, Arnd Bergmann wrote:
> On Saturday 20 April 2013 10:28:55 Chen Gang wrote:
>>
>> -------------------------------patch begin--------------------------------------
>>
>> diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
>> index 968b5cb..b572d2b 100644
>> --- a/arch/arm64/include/asm/cmpxchg.h
>> +++ b/arch/arm64/include/asm/cmpxchg.h
>> @@ -170,4 +170,6 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
>>                                        (unsigned long)(n),              \
>>                                        sizeof(*(ptr))))
>>  
>> +#define cmpxchg64(ptr,o,n)     cmpxchg((ptr),(o),(n))
>> +
>>  #endif /* __ASM_CMPXCHG_H */
> 
> Yes, this looks good. Please provide the same for cmpxchg64_local.
> 

  ok, thanks, I will send related patch.


gchen.