linux-kernel - Re: [PATCH 05/16] blackfin idle: delete pm

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Date:	Wed, 20 Feb 2013 20:53:38 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Len Brown <lenb@...nel.org>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: Re: [PATCH 05/16] blackfin idle: delete pm_idle

On 02/20/2013 08:52 PM, Rafael J. Wysocki wrote:
> On Monday, February 18, 2013 05:28:19 PM Lars-Peter Clausen wrote:
>> On 02/10/2013 06:58 AM, Len Brown wrote:
>>> From: Len Brown <len.brown@...el.com>
>>>
>>> pm_idle is dead code on blackfin.
>>>
>>> Signed-off-by: Len Brown <len.brown@...el.com>
>>> Cc: uclinux-dist-devel@...ckfin.uclinux.org
>>> ---
>>>  arch/blackfin/kernel/process.c | 7 -------
>>>  1 file changed, 7 deletions(-)
>>>
>>> diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
>>> index 3e16ad9..8061426 100644
>>> --- a/arch/blackfin/kernel/process.c
>>> +++ b/arch/blackfin/kernel/process.c
>>> @@ -39,12 +39,6 @@ int nr_l1stack_tasks;
>>>  void *l1_stack_base;
>>>  unsigned long l1_stack_len;
>>>  
>>> -/*
>>> - * Powermanagement idle function, if any..
>>> - */
>>> -void (*pm_idle)(void) = NULL;
>>> -EXPORT_SYMBOL(pm_idle);
>>> -
>>>  void (*pm_power_off)(void) = NULL;
>>>  EXPORT_SYMBOL(pm_power_off);
>>>  
>>> @@ -81,7 +75,6 @@ void cpu_idle(void)
>>>  {
>>>  	/* endless idle loop with no priority at all */
>>>  	while (1) {
>>> -		void (*idle)(void) = pm_idle;
>>
>> Hi,
>>
>> This results in the following error:
>>
>> arch/blackfin/kernel/process.c: In function ‘cpu_idle’:
>> arch/blackfin/kernel/process.c:83: error: ‘idle’ undeclared (first use in
>> this function)
>> arch/blackfin/kernel/process.c:83: error: (Each undeclared identifier is
>> reported only once
>> arch/blackfin/kernel/process.c:83: error: for each function it appears in.)
>> arch/blackfin/kernel/process.c:88: error: implicit declaration of function
>> ‘idle’
>>
>>
>> This change on top of your patch, fixes it.
> 
> Lars, I need your sign-off for the patch below.  May I add it?
> 
> Rafael

Sure, I didn't realize the patches had already been merged, otherwise I'd have
sent a proper patch.

- Lars


>> diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
>> index 8061426..9782c03 100644
>> --- a/arch/blackfin/kernel/process.c
>> +++ b/arch/blackfin/kernel/process.c
>> @@ -80,12 +80,10 @@ void cpu_idle(void)
>>  		if (cpu_is_offline(smp_processor_id()))
>>  			cpu_die();
>>  #endif
>> -		if (!idle)
>> -			idle = default_idle;
>>  		tick_nohz_idle_enter();
>>  		rcu_idle_enter();
>>  		while (!need_resched())
>> -			idle();
>> +			default_idle();
>>  		rcu_idle_exit();
>>  		tick_nohz_idle_exit();
>>  		preempt_enable_no_resched();
>>
>>
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