linux-kernel - Re: [PATCH 3/3] clocksource: pxa: Fix section mismatch

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Date:	Wed, 25 Feb 2015 11:56:35 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Ingo Molnar <mingo@...nel.org>
CC:	tglx@...utronix.de, matthias.bgg@...il.com, robert.jarzmik@...e.fr,
	linux@...ck-us.net, linux@...pel-privat.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] clocksource: pxa: Fix section mismatch

On 02/25/2015 11:48 AM, Ingo Molnar wrote:
>
> * Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>
>> On 02/25/2015 11:35 AM, Ingo Molnar wrote:
>>>
>>> * Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>>>
>>>> From: Robert Jarzmik <robert.jarzmik@...e.fr>
>>>>
>>>> As pxa_timer_common_init() is only called in init context, mark it as
>>>> such, and quiesce the compiler warnings :
>>>> WARNING: vmlinux.o(.text.unlikely+0x45d4): Section mismatch in reference
>>> >from the function pxa_timer_common_init() to the function
>>>> .init.text:sched_clock_register()
>>>>
>>>> WARNING: vmlinux.o(.text.unlikely+0x4610): Section mismatch in reference
>>> >from the function pxa_timer_common_init() to the function
>>>> .init.text:clocksource_mmio_init()
>>>>
>>>> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
>>>> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>>>> ---
>>>>   drivers/clocksource/pxa_timer.c | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/clocksource/pxa_timer.c b/drivers/clocksource/pxa_timer.c
>>>> index 941f3f3..d9438af 100644
>>>> --- a/drivers/clocksource/pxa_timer.c
>>>> +++ b/drivers/clocksource/pxa_timer.c
>>>> @@ -163,7 +163,7 @@ static struct irqaction pxa_ost0_irq = {
>>>>   	.dev_id		= &ckevt_pxa_osmr0,
>>>>   };
>>>>
>>>> -static void pxa_timer_common_init(int irq, unsigned long clock_tick_rate)
>>>> +static void __init pxa_timer_common_init(int irq, unsigned long clock_tick_rate)
>>>>   {
>>>>   	timer_writel(0, OIER);
>>>>   	timer_writel(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
>>>
>>> So this is then used indirectly by:
>>>
>>> CLOCKSOURCE_OF_DECLARE(pxa_timer, "marvell,pxa-timer", pxa_timer_dt_init);
>>>
>>> which should probably be marked __initdata?
>>
>>
>> Sorry, I miss the point. What should be marked __initdata ?
>
> so CLOCKSOURCE_OF_DECLARE() defines 'struct of_device_id'
> entries, right? Those, if they are only used during
> initialization, should be marked __initdata.
>
> Or are they mixed use?

Ah, ok. Thanks for the clarification. I thought there was an issue with 
the patch and I was hanging the PR.

Let me look in details.


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