linux-kernel - Re: [PATCH 3/4] rpmsg: add helper macro module_rpmsg

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Date:	Wed, 4 May 2016 13:54:23 -0500
From:	Suman Anna <s-anna@...com>
To:	"Andrew F. Davis" <afd@...com>, Ohad Ben-Cohen <ohad@...ery.com>,
	Bjorn Andersson <bjorn.andersson@...aro.org>,
	Jonathan Corbet <corbet@....net>
CC:	<linux-remoteproc@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] rpmsg: add helper macro module_rpmsg_driver

Hi Andrew,

On 05/04/2016 01:34 PM, Andrew F. Davis wrote:
> This patch introduces the module_rpmsg_driver macro which is a
> convenience macro for rpmsg driver modules similar to
> module_platform_driver. It is intended to be used by drivers which
> init/exit section does nothing but register/unregister the rpmsg driver.
> By using this macro it is possible to eliminate a few lines of
> boilerplate code per rpmsg driver.
> 
> Signed-off-by: Andrew F. Davis <afd@...com>
> ---
>  include/linux/rpmsg.h | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
> index 78e45ce..ada50ff 100644
> --- a/include/linux/rpmsg.h
> +++ b/include/linux/rpmsg.h
> @@ -177,13 +177,23 @@ struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_channel *,
>  int
>  rpmsg_send_offchannel_raw(struct rpmsg_channel *, u32, u32, void *, int, bool);
>  
> -/*
> - * use a macro to avoid include chaining to get THIS_MODULE
> - */
> +/* use a macro to avoid include chaining to get THIS_MODULE */

This change does not belong to this patch, the modified lines were
introduced in patch 1, so please correct it in that patch.

regards
Suman

>  #define register_rpmsg_driver(drv) \
>  	__register_rpmsg_driver(drv, THIS_MODULE)
>  
>  /**
> + * module_rpmsg_driver() - Helper macro for registering an rpmsg driver
> + * @__rpmsg_driver: rpmsg_driver struct
> + *
> + * Helper macro for rpmsg drivers which do not do anything special in module
> + * init/exit. This eliminates a lot of boilerplate.  Each module may only
> + * use this macro once, and calling it replaces module_init() and module_exit()
> + */
> +#define module_rpmsg_driver(__rpmsg_driver) \
> +	module_driver(__rpmsg_driver, register_rpmsg_driver, \
> +			unregister_rpmsg_driver)
> +
> +/**
>   * rpmsg_send() - send a message across to the remote processor
>   * @rpdev: the rpmsg channel
>   * @data: payload of message
>