linux-kernel - Re: [PATCH] ARM: imx: build v7_cpu

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Message-ID: <20200217075216.GL7973@dragon>
Date:   Mon, 17 Feb 2020 15:52:16 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Rouven Czerwinski <r.czerwinski@...gutronix.de>
Cc:     s.hauer@...gutronix.de, Ahmad Fatoum <a.fatoum@...gutronix.de>,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        kernel@...gutronix.de, festevam@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        Lucas Stach <l.stach@...gutronix.de>
Subject: Re: [PATCH] ARM: imx: build v7_cpu_resume() unconditionally

On Thu, Jan 16, 2020 at 03:18:49PM +0100, Rouven Czerwinski wrote:
> From: Ahmad Fatoum <a.fatoum@...gutronix.de>
> 
> This function is not only needed by the platform suspend code, but is also
> reused as the CPU resume function when the ARM cores can be powered down
> completely in deep idle, which is the case on i.MX6SX and i.MX6UL(L).
> 
> Providing the static inline stub whenever CONFIG_SUSPEND is disabled means
> that those platforms will hang on resume from cpuidle if suspend is disabled.
> 
> So there are two problems:
> 
>   - The static inline stub masks the linker error
>   - The function is not available where needed
> 
> Fix both by just building the function unconditionally, when
> CONFIG_SOC_IMX6 is enabled. The actual code is three instructions long,
> so it's arguably ok to just leave it in for all i.MX6 kernel configurations.
> 
> Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
> Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
> Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
> Signed-off-by: Rouven Czerwinski <r.czerwinski@...gutronix.de>

Applied, thanks.