linux-kernel - RE: [PATCH v3] rtc: add devm_rtc_device

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Date:	Wed, 6 Mar 2013 11:33:11 +0530
From:	Venu Byravarasu <vbyravarasu@...dia.com>
To:	Jingoo Han <jg1.han@...sung.com>,
	'Andrew Morton' <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	'Tejun Heo' <tj@...nel.org>, 'Greg KH' <greg@...ah.com>,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	"rtc-linux@...glegroups.com" <rtc-linux@...glegroups.com>
Subject: RE: [PATCH v3] rtc: add devm_rtc_device_{register,unregister}()

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-
> owner@...r.kernel.org] On Behalf Of Jingoo Han
> Sent: Tuesday, February 26, 2013 7:20 AM
> To: 'Andrew Morton'
> Cc: linux-kernel@...r.kernel.org; 'Tejun Heo'; 'Greg KH'; 'Alessandro
> Zummo'; rtc-linux@...glegroups.com; 'Jingoo Han'
> Subject: [PATCH v3] rtc: add devm_rtc_device_{register,unregister}()
> 
> These functios allows the driver core to automatically clean up
> any allocation made by rtc drivers. Thus, it simplifies the error
> paths.
> 
> Signed-off-by: Jingoo Han <jg1.han@...sung.com>
> ---
> Changes since v2:
> - Removed unnecessary WARN_ON() of devm_rtc_device_match()
> 
> Changes since v1:
> - Simplified 'if' statements using WARN_ON()
> - Added a description of the return value of devm_rtc_device_register()
> 
>  drivers/rtc/class.c |   70
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>  include/linux/rtc.h |    6 ++++
>  2 files changed, 76 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
> index 9b742d3..b72b40b 100644
> --- a/drivers/rtc/class.c
> +++ b/drivers/rtc/class.c

> +/**
> + * devm_rtc_device_register - resource managed rtc_device_register()
> + * @name: the name of the device
> + * @dev: the device to register
> + * @ops: the rtc operations structure
> + * @owner: the module owner
> + *
> + * @return a struct rtc on success, or an ERR_PTR on error
> + *
> + * Managed rtc_device_register(). The rtc_device returned from this
> function
> + * are automatically freed on driver detach. See rtc_device_register()
> + * for more information.
> + */
> +
> +struct rtc_device *devm_rtc_device_register(const char *name,
> +					struct device *dev,

As most of devm_* functions use  " struct device *dev" as their first param,
why not this function also modified to be in sync with them?

> +					const struct rtc_class_ops *ops,
> +					struct module *owner)
> +{
> +	struct rtc_device **ptr, *rtc;
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