linux-kernel - Re: [PATCH 01/27] smpboot: Provide a generic method to boot secondary processors

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Message-ID: <4FCA3285.8070804@linux.vnet.ibm.com>
Date:	Sat, 02 Jun 2012 21:04:29 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	Sam Ravnborg <sam@...nborg.org>
CC:	tglx@...utronix.de, peterz@...radead.org,
	paulmck@...ux.vnet.ibm.com, rusty@...tcorp.com.au,
	mingo@...nel.org, yong.zhang0@...il.com, akpm@...ux-foundation.org,
	vatsa@...ux.vnet.ibm.com, rjw@...k.pl, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, nikunj@...ux.vnet.ibm.com,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Venkatesh Pallipadi <venki@...gle.com>
Subject: Re: [PATCH 01/27] smpboot: Provide a generic method to boot	secondary
 processors

On 06/02/2012 08:46 PM, Sam Ravnborg wrote:

> On Sat, Jun 02, 2012 at 04:11:28AM +0530, Srivatsa S. Bhat wrote:
>> On 06/01/2012 10:23 PM, Sam Ravnborg wrote:
>>
>>>> +
>>>> +
>>>> +/* Implement the following functions in your architecture, as appropriate. */
>>>> +
>>>> +/**
>>>> + * __cpu_pre_starting()
>>>> + *
>>>> + * Implement whatever you need to do before the CPU_STARTING notifiers are
>>>> + * invoked. Note that the CPU_STARTING callbacks run *on* the cpu that is
>>>> + * coming up. So that cpu better be prepared! IOW, implement all the early
>>>> + * boot/init code for the cpu here. And do NOT enable interrupts.
>>>> + */
>>>> +#ifndef __cpu_pre_starting
>>>> +void __weak __cpu_pre_starting(void *arg) {}
>>>> +#endif
>>>
>>> I miss the prototype for this in a header?
>>
>>
>> Prototype is not really necessary for this. Hence not added.
> There is a simple rule:
> 1) If a function is declared => not static
> 2) If function not declared => static
> 
> With respect to this simple rule your functions shall be defined as static.
> And that would not work.
> 


Fair enough. Will add prototypes in include/linux/smpboot.h

Thanks you!

Regards,
Srivatsa S. Bhat

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