linux-kernel - Re: [PATCH 3/9] arm: add call to CPU idle quirks handler

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Date:	Tue, 23 Jun 2015 23:59 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Paul Osmialowski <pawelo@...g.net.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Anson Huang <b20788@...escale.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Bhupesh Sharma <bhupesh.sharma@...escale.com>,
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	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
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	Jingchang Lu <jingchang.lu@...escale.com>,
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	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-serial@...r.kernel.org,
	devicetree@...r.kernel.org, dmaengine@...r.kernel.org,
	Yuri Tikhonov <yur@...raft.com>,
	Sergei Poselenov <sposelenov@...raft.com>,
	Dmitry Cherkassov <d_cherkasov@...raft.com>,
	Alexander Potashev <aspotashev@...raft.com>
Subject: Re: [PATCH 3/9] arm: add call to CPU idle quirks handler

On Tuesday 23 June 2015 23:19:41 Paul Osmialowski wrote:
> Some SoCs need additional actions to be performed after arch idle,
> e.g. Kinetis requires invalidation of the I/D bus cache.
> 
> Such handler could be held in provided <mach/idle.h> header file.
> 
> Signed-off-by: Paul Osmialowski <pawelo@...g.net.pl>
> ---
>  arch/arm/Kconfig          | 7 +++++++
>  arch/arm/kernel/process.c | 7 +++++++
>  2 files changed, 14 insertions(+)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 8e3a833..8ef8f8f 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -98,6 +98,13 @@ config ARM_HAS_SG_CHAIN
>  config NEED_SG_DMA_LENGTH
>  	bool
>  
> +config NEED_MACH_IDLE_H
> +	bool
> +
> +config ARM_CPU_IDLE_QUIRKS
> +	bool
> +	select NEED_MACH_IDLE_H
> +

We're not adding header files like this, please come up
with another solution. How about a cpuidle driver, or
possibly just overriding arm_pm_idle()?


	Arnd
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