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Subject[PATCH 2/2] Driver core: add typechecking to platform_{get,set}_drvdata
Date
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@pengutronix.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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