linux-kernel - Re: [Suggestion] ARM64: kernel: compiling issue, need implement cmpxchg64 with assembler language.

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Message-ID: <5174C5C6.5010206@asianux.com>
Date:	Mon, 22 Apr 2013 13:08:22 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Tony Lindgren <tony@...mide.com>,
	"olof@...om.net" <olof@...om.net>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Suggestion] ARM64: kernel: compiling issue, need implement cmpxchg64
 with assembler language.

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.

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