linux-kernel - [PATCH 2/2] Driver core: add typechecking to platform_{get,set}

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Message-Id: <1297893351-2900-3-git-send-email-mkl@pengutronix.de>
Date:	Wed, 16 Feb 2011 22:55:51 +0100
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	kernel@...gutronix.de
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 2/2] Driver core: add typechecking to platform_{get,set}_drvdata

Use the previously introduced BUILD_BUG_ON_NOT_SAME_TYPE to check if the
dev argument is a struct platform_device pointer.

Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 include/linux/platform_device.h |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 2e700ec..761a917 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -130,8 +130,14 @@ extern void platform_driver_unregister(struct platform_driver *);
 extern int platform_driver_probe(struct platform_driver *driver,
 		int (*probe)(struct platform_device *));
 
-#define platform_get_drvdata(_dev)	dev_get_drvdata(&(_dev)->dev)
-#define platform_set_drvdata(_dev,data)	dev_set_drvdata(&(_dev)->dev, (data))
+#define platform_get_drvdata(_dev)	({ \
+	BUILD_BUG_ON_NOT_SAME_TYPE((_dev), (struct platform_device *)NULL); \
+	dev_get_drvdata(&(_dev)->dev); \
+})
+#define platform_set_drvdata(_dev,data)	({ \
+	BUILD_BUG_ON_NOT_SAME_TYPE((_dev), (struct platform_device *)NULL); \
+	dev_set_drvdata(&(_dev)->dev, (data)); \
+})
 
 extern struct platform_device *platform_create_bundle(struct platform_driver *driver,
 					int (*probe)(struct platform_device *),
-- 
1.7.2.3

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