linux-kernel - Re: [PATCH 02/15] ARM: pass IRQ domain to the core IRQ handler

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Message-ID: <20140802075118.GV30282@n2100.arm.linux.org.uk>
Date:	Sat, 2 Aug 2014 08:51:18 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Alexander Shiyan <shc_work@...l.ru>,
	Barry Song <baohua@...nel.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Kevin Hilman <khilman@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Larry Bassel <larry.bassel@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH 02/15] ARM: pass IRQ domain to the core IRQ handler

On Tue, Jul 08, 2014 at 02:10:25PM +0100, Marc Zyngier wrote:
> Calling irq_find_mapping from outside a irq_{enter,exit} section is
> unsafe and produces ugly messages if CONFIG_PROVE_RCU is enabled:
> If coming from the idle state, the rcu_read_lock call in irq_find_mapping
> will generate an an unpleasant warning.
> 
> A solution is to add a new handle_domain_irq entry point into
> the arm code that the interrupt controller code can call.
> This new function takes an irq_domain, and calls into irq_find_domain
> inside the irq_{enter,exit} block.
> 
> Interrupt controllers can then be updated to use the new mechanism.

I merged this last night, and this says it all...

Subject: rmk build: 244 warnings 49 failures (rmk/v3.16-rc3-70-gc1ed1df)

arch/arm/kernel/irq.c:81:3: error: implicit declaration of function 'irq_find_mapping' [-Werror=implicit-function-declaration]

So I'm dropping it.

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