linux-kernel - Re: [PATCH] ARM: Re-enable TRACE_IRQFLAGS

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Message-ID: <CALszF6B7G7uMPB0BMYVDvUnsqqzSO85w-iU61JT0xDmkm0uqfw@mail.gmail.com>
Date:	Tue, 9 Jun 2015 16:42:30 +0200
From:	Maxime Coquelin <mcoquelin.stm32@...il.com>
To:	Daniel Thompson <daniel.thompson@...aro.org>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: Re-enable TRACE_IRQFLAGS_SUPPORT on ARMv7-M

Hi Daniel,

2015-06-09 13:41 GMT+02:00 Daniel Thompson <daniel.thompson@...aro.org>:
> On 09/06/15 10:14, Maxime Coquelin wrote:
>>>
>>> The real solution is to provide a definition _in asm-generic_ for
>>> arch_irqs_disabled(), rather than having almost every arch doing:
>>>
>>> static inline bool arch_irqs_disabled(void)
>>> {
>>>          return arch_irqs_disabled_flags(arch_local_save_flags());
>>> }
>>>
>>> I'm personally refusing to take a patch for ARM which adds yet another
>>> copy of the above.  This is, after all, exactly the kind of stuff that
>>> should be in asm-generic, or if not, in include/linux but overridable
>>> by arch stuff.
>>>
>>> We keep going between the two extremes of "lets push lots of stuff into
>>> arch stuff" and "lets try to extract the common bits out of arch code".
>>>
>>> Let's try and settle on one approach, and apply it universally.

>
> Does the following patch, which makes the arch_irqs_disabled()
> implementation from asm-generic available on arm, fix the build for you?

I confirm it fixes the build on Russell's for-next branch with efm32_defconfig.
I have no efm32 HW to test it though.

>
> I've only done a real quick 'n dirty check for regression:
> multi_v7_defconfig still works ;-)
>
> If the patch is useful I can test it a bit harder...

I can also test it this evening with my stm32 config.

Thanks,
Maxime
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