linux-kernel - Re: [PATCH v2] arm64: kernel: compiling issue, need delete read_current

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Message-ID: <51B2B50A.1050305@asianux.com>
Date:	Sat, 08 Jun 2013 12:37:30 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Will Deacon <will.deacon@....com>,
	Marc Zyngier <Marc.Zyngier@....com>
CC:	Catalin Marinas <Catalin.Marinas@....com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Tony Lindgren <tony@...mide.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: kernel: compiling issue, need delete read_current_timer().

Hello Maintainers:

Please help check it, when you have time.

Thanks.

On 05/27/2013 06:02 PM, Chen Gang wrote:
> Hello Maintainers:
> 
> Please help check this patch whether OK, when you have time.
> 
> Thanks.
> 
> On 05/21/2013 05:46 PM, Chen Gang wrote:
>>
>> Under arm64, we will calibrate the delay loop statically using a known
>> timer frequency, so delete read_current_timer(), or it will cause
>> compiling issue with allmodconfig.
>>
>> The related error:
>>   ERROR: "read_current_timer" [lib/rbtree_test.ko] undefined!
>>   ERROR: "read_current_timer" [lib/interval_tree_test.ko] undefined!
>>   ERROR: "read_current_timer" [fs/ext4/ext4.ko] undefined!
>>   ERROR: "read_current_timer" [crypto/tcrypt.ko] undefined!
>>
>>
>> Signed-off-by: Chen Gang <gang.chen@...anux.com>
>> ---
>>  arch/arm64/include/asm/timex.h |    6 +++---
>>  arch/arm64/kernel/time.c       |    6 ------
>>  2 files changed, 3 insertions(+), 9 deletions(-)
>>
>> diff --git a/arch/arm64/include/asm/timex.h b/arch/arm64/include/asm/timex.h
>> index b24a31a..81a076e 100644
>> --- a/arch/arm64/include/asm/timex.h
>> +++ b/arch/arm64/include/asm/timex.h
>> @@ -16,14 +16,14 @@
>>  #ifndef __ASM_TIMEX_H
>>  #define __ASM_TIMEX_H
>>  
>> +#include <asm/arch_timer.h>
>> +
>>  /*
>>   * Use the current timer as a cycle counter since this is what we use for
>>   * the delay loop.
>>   */
>> -#define get_cycles()	({ cycles_t c; read_current_timer(&c); c; })
>> +#define get_cycles()	arch_counter_get_cntvct()
>>  
>>  #include <asm-generic/timex.h>
>>  
>> -#define ARCH_HAS_READ_CURRENT_TIMER
>> -
>>  #endif
>> diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c
>> index a551f88..03dc371 100644
>> --- a/arch/arm64/kernel/time.c
>> +++ b/arch/arm64/kernel/time.c
>> @@ -68,12 +68,6 @@ unsigned long long notrace sched_clock(void)
>>  	return arch_timer_read_counter() * sched_clock_mult;
>>  }
>>  
>> -int read_current_timer(unsigned long *timer_value)
>> -{
>> -	*timer_value = arch_timer_read_counter();
>> -	return 0;
>> -}
>> -
>>  void __init time_init(void)
>>  {
>>  	u32 arch_timer_rate;
>>
> 
> 


-- 
Chen Gang

Asianux Corporation
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