linux-kernel - Re: [PATCH v2 02/18] ARM: ARMv7M: Enlarge vector table to 256 entries

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Date:	Thu, 26 Feb 2015 11:29:52 +0100
From:	Maxime Coquelin <mcoquelin.stm32@...il.com>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	Andreas Färber <afaerber@...e.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Rob Herring <robh+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Jonathan Corbet <corbet@....net>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Joe Perches <joe@...ches.com>, Antti Palosaari <crope@....fi>,
	Tejun Heo <tj@...nel.org>, Will Deacon <will.deacon@....com>,
	Nikolay Borisov <Nikolay.Borisov@....com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Kees Cook <keescook@...omium.org>,
	Michal Marek <mmarek@...e.cz>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
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Subject: Re: [PATCH v2 02/18] ARM: ARMv7M: Enlarge vector table to 256 entries

2015-02-23 11:33 GMT+01:00 Maxime Coquelin <mcoquelin.stm32@...il.com>:
> 2015-02-20 20:47 GMT+01:00 Uwe Kleine-König <u.kleine-koenig@...gutronix.de>:
>> On Fri, Feb 20, 2015 at 07:01:01PM +0100, Maxime Coquelin wrote:
>>> From Cortex-M reference manuals, the nvic supports up to 240 interrupts.
>>> So the number of entries in vectors table is up to 256.
>>>
>>> This patch adds a new config flag to specify the number of external interrupts.
>>> Some ifdeferies are added in order to respect the natural alignment without
>>> wasting too much space on smaller systems.
>>>
>>> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@...il.com>
>>> ---
>>>  arch/arm/kernel/entry-v7m.S | 13 +++++++++----
>>>  arch/arm/mm/Kconfig         | 15 +++++++++++++++
>>>  2 files changed, 24 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/arch/arm/kernel/entry-v7m.S b/arch/arm/kernel/entry-v7m.S
>>> index 8944f49..68cde36 100644
>>> --- a/arch/arm/kernel/entry-v7m.S
>>> +++ b/arch/arm/kernel/entry-v7m.S
>>> @@ -117,9 +117,14 @@ ENTRY(__switch_to)
>>>  ENDPROC(__switch_to)
>>>
>>>       .data
>>> -     .align  8
>>> +#if CONFIG_CPUV7M_NUM_IRQ <= 112
>> I would have called this CONFIG_CPU_V7M_NUM_IRQ to match the already
>> existing CPU_V7M symbol.
>
> That's better indeed.
> It will be changed in v3.
>
>>
>>> +     .align  9
>>> +#else
>>> +     .align  10
>>> +#endif
>>> +
>>
>> Other than that:
>> Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
>>
>> Who do you target to apply this series?
>
> I guess it should go through Russell's Patch Tracking System?

Sorry, I answered your question too quickly.
I meant this patch should go through Russell's Patch Tracking System.

For the other patches, I think it should be picked by their respective
maintainers.
Or I can create an immutable tag (on github or kernel.org?) that will
be merged by the different sub-systems?
What would you advise?

Thanks,
Maxime

>
> Thanks,
> Maxime
>>
>> Best regards
>> Uwe
>>
>> --
>> Pengutronix e.K.                           | Uwe Kleine-König            |
>> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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