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

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Message-ID: <1462386855-17381-3-git-send-email-afd@ti.com>
Date:	Wed, 4 May 2016 13:34:14 -0500
From:	"Andrew F. Davis" <afd@...com>
To:	Ohad Ben-Cohen <ohad@...ery.com>,
	Bjorn Andersson <bjorn.andersson@...aro.org>,
	Jonathan Corbet <corbet@....net>, Suman Anna <s-anna@...com>
CC:	<linux-remoteproc@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, "Andrew F . Davis" <afd@...com>
Subject: [PATCH 3/4] rpmsg: add helper macro module_rpmsg_driver

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 */
 #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
-- 
2.8.2