Merge tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux...

[firefly-linux-kernel-4.4.55.git] / include / linux / device.h

diff --git a/include/linux/device.h b/include/linux/device.h
index 00ac57c26615103b0983040981cac8012c9e2f99..5a31bf3a40243e1faff078fdc509361568143f01 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1300,4 +1300,26 @@ static void __exit __driver##_exit(void) \
 } \
 module_exit(__driver##_exit);
 
+/**
+ * builtin_driver() - Helper macro for drivers that don't do anything
+ * special in init and have no exit. This eliminates some boilerplate.
+ * Each driver may only use this macro once, and calling it replaces
+ * device_initcall (or in some cases, the legacy __initcall).  This is
+ * meant to be a direct parallel of module_driver() above but without
+ * the __exit stuff that is not used for builtin cases.
+ *
+ * @__driver: driver name
+ * @__register: register function for this driver type
+ * @...: Additional arguments to be passed to __register
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define builtin_driver(__driver, __register, ...) \
+static int __init __driver##_init(void) \
+{ \
+       return __register(&(__driver) , ##__VA_ARGS__); \
+} \
+device_initcall(__driver##_init);
+
 #endif /* _DEVICE_H_ */