linux-kernel - Re: [PATCH v2] cros_ec: Use devm

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Message-ID: <20180605065907.GE21163@dell>
Date:   Tue, 5 Jun 2018 07:59:07 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Gwendal Grignou <gwendal@...omium.org>
Cc:     bleung@...omium.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] cros_ec: Use devm_kzalloc for private data

On Wed, 30 May 2018, Gwendal Grignou wrote:

> Use dev_kzmalloc, remove .release entry point.
> 
> Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
> ---
> Change sinc v1:
> - Readd __remove to avoid a warning when loaded as a module.
> 
>  drivers/mfd/cros_ec_dev.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
> index 1d6dc5c7a19d..81466264f7fc 100644
> --- a/drivers/mfd/cros_ec_dev.c
> +++ b/drivers/mfd/cros_ec_dev.c
> @@ -262,12 +262,7 @@ static const struct file_operations fops = {
>  #endif
>  };
>  
> -static void __remove(struct device *dev)
> -{
> -	struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
> -					      class_dev);
> -	kfree(ec);
> -}
> +static void __remove(struct device *dev) { }

I missed this line when reviewing.

Why are you keeping the function around?

As a result, we now suffer with a build warning:

  drivers/mfd/cros_ec_dev.c:265:13: warning: '__remove' defined but not used [-Wunused-function]
   static void __remove(struct device *dev) { }

Can I just remove the line?  What are the ramifications of doing so?

Please reply swiftly, so resolve this issue in good time.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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