linux-kernel - Re: [PATCH] ARM: imx: select ARM_CPU

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Message-ID: <20160228031946.GF22051@tiger>
Date:	Sun, 28 Feb 2016 11:19:46 +0800
From:	Shawn Guo <shawnguo@...nel.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Sascha Hauer <kernel@...gutronix.de>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: imx: select ARM_CPU_SUSPEND only for imx6

On Fri, Feb 26, 2016 at 12:54:12PM +0100, Arnd Bergmann wrote:
> i.MX only needs to select ARM_CPU_SUSPEND manually for the
> very specific case that CONFIG_PM_SLEEP is disabled and imx6
> is used with CONFIG_PM enabled for runtime PM.
> 
> If we are building a kernel only for CPUs that are not using
> the cpu_suspend() helper, we otherwise get a harmless
> build warning:
> 
> warning: (ARCH_MXC && SOC_IMX23 && SOC_IMX28 && ARCH_PXA && MACH_MVEBU_V7 && ARCH_OMAP3 && ARCH_OMAP4 && SOC_OMAP5 && SOC_AM33XX && SOC_DRA7XX && ARCH_EXYNOS3 && ARCH_EXYNOS4 && EXYNOS5420_MCPM && EXYNOS_CPU_SUSPEND && ARCH_VEXPRESS_TC2_PM && ARM_BIG_LITTLE_CPUIDLE && ARM_HIGHBANK_CPUIDLE && QCOM_PM) selects ARM_CPU_SUSPEND which has unmet direct dependencies (ARCH_SUSPEND_POSSIBLE)
> 
> This moves the option to the SOC_IMX6 option that actually
> requires it, in effect reverting commit f36b594f3754 ("ARM:
> mach-imx: Select ARM_CPU_SUSPEND at ARCH_MXC level") that was
> meant as a cleanup and unintentionally caused this warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks.