ACPI: catch calls of acpi_driver_data on pointer of wrong type

Catch attempts to use of acpi_driver_data on pointers of wrong type.

akpm: rewritten to use proper C typechecking and remove the
"function"-used-as-lvalue thing.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index a5ac0bc7f52e..47682465f1f5 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -300,7 +300,11 @@ struct acpi_device {
         enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 };
 
-#define acpi_driver_data(d)     ((d)->driver_data)
+static inline void *acpi_driver_data(struct acpi_device *d)
+{
+        return d->driver_data;
+}
+
 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)