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Date:	Sun, 07 Apr 2013 23:29:17 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Hans-Christian Egtvedt <egtvedt@...fundet.no>
CC:	Jiang Liu <jiang.liu@...wei.com>,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] AVR32: fix building warnings caused by redifinitions
 of HZ

On 04/07/2013 03:55 PM, Hans-Christian Egtvedt wrote:
> Around Sun 07 Apr 2013 00:43:36 +0800 or thereabout, Jiang Liu wrote:
>> Fix building warnings caused by redifinitions of HZ:
>> In file included from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
>>                  from include/linux/timex.h:63,
>>                  from include/linux/jiffies.h:8,
>>                  from include/linux/ktime.h:25,
>>                  from include/linux/timer.h:5,
>>                  from include/linux/workqueue.h:8,
>>                  from include/linux/srcu.h:34,
>>                  from include/linux/notifier.h:15,
>>                  from include/linux/memory_hotplug.h:6,
>>                  from include/linux/mmzone.h:777,
>>                  from include/linux/gfp.h:4,
>>                  from arch/avr32/mm/init.c:10:
>> /ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:6:1: warning: "HZ" redefined
>> In file included from /ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:4,
>>                  from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
>>                  from include/linux/timex.h:63,
>>                  from include/linux/jiffies.h:8,
>>                  from include/linux/ktime.h:25,
>>                  from include/linux/timer.h:5,
>>                  from include/linux/workqueue.h:8,
>>                  from include/linux/srcu.h:34,
>>                  from include/linux/notifier.h:15,
>>                  from include/linux/memory_hotplug.h:6,
>>                  from include/linux/mmzone.h:777,
>>                  from include/linux/gfp.h:4,
>>                  from arch/avr32/mm/init.c:10:
>> /ws/linux/kernel/linux.git/arch/avr32/include/uapi/asm/param.h:6:1: warning: this is the location of the previous definition
> 
> Thanks for fixing.
> 
>> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>> Cc: Haavard Skinnemoen <hskinnemoen@...il.com>
>> Cc: Hans-Christian Egtvedt <egtvedt@...fundet.no>
>> Cc: linux-kernel@...r.kernel.org
> 
> Acked-by: Hans-Christian Egtvedt <egtvedt@...fundet.no>
> 
>> ---
>>  arch/avr32/include/uapi/asm/param.h |    6 +++++-
>>  1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/avr32/include/uapi/asm/param.h b/arch/avr32/include/uapi/asm/param.h
>> index d28aa5e..abda103 100644
>> --- a/arch/avr32/include/uapi/asm/param.h
>> +++ b/arch/avr32/include/uapi/asm/param.h
>> @@ -2,7 +2,11 @@
>>  #define _UAPI__ASM_AVR32_PARAM_H
>>  
>>  
>> -#ifndef HZ
>> +#ifndef __KERNEL__
>> +   /*
>> +    * Technically, this is wrong, but some old apps still refer to it.
>> +    * The proper way to get the HZ value is via sysconf(_SC_CLK_TCK).
>> +    */
> 
> With this comment, are there AVR32 drivers/users that should be fixed? Or is
> it parts of the tree in general?
Hi Hans,
	It's copied from arch/ia64/include/uapi/asm/param.h, I feel it should be
the same for AVR32 too.
	Regards!
	Gerry
> 
>>  # define HZ		100
>>  #endif
>>  

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