[PATCH v3 1/3] parport: Introduce module_parport_driver() helper macro

Andy Shevchenko
2021-03-03T15:28:40Z

Introduce module_parport_driver() helper macro to reduce boilerplate
in the existing and new code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---
include/linux/parport.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/linux/parport.h b/include/linux/parport.h
index f981f794c850..1c16ffb8b908 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -332,9 +332,19 @@ int __must_check __parport_register_driver(struct parport_driver *,
__parport_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)

/* Unregister a high-level driver. */
-extern void parport_unregister_driver (struct parport_driver *);
void parport_unregister_driver(struct parport_driver *);

+/**
+ * module_parport_driver() - Helper macro for registering a modular parport driver
+ * @__parport_driver: struct parport_driver to be used
+ *
+ * Helper macro for parport drivers which do not do anything special in module
+ * init and 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_parport_driver(__parport_driver) \
+ module_driver(__parport_driver, parport_register_driver, parport_unregister_driver)
+
/* If parport_register_driver doesn't fit your needs, perhaps
* parport_find_xxx does. */
extern struct parport *parport_find_number (int);
--
2.30.1