From: Greg Kroah-Hartman Date: Thu, 17 Nov 2011 22:38:33 +0000 (-0800) Subject: USB: Add helper macro for usb_driver boilerplate X-Git-Tag: v3.3-rc1~30^2~1^2~40 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=f3a6a4b6cfc80e57bf16bb12f9425bec1a5731a9;p=~emulex%2Finfiniband.git USB: Add helper macro for usb_driver boilerplate This patch introduces the module_usb_driver macro which is a convenience macro for USB driver modules similar to module_platform_driver. It is intended to be used by drivers which init/exit section does nothing but register/unregister the USB driver. By using this macro it is possible to eliminate a few lines of boilerplate code per USB driver. Based on work done by Lars-Peter Clausen for other busses (i2c and spi). Cc: Lars-Peter Clausen Signed-off-by: Greg Kroah-Hartman --- diff --git a/include/linux/usb.h b/include/linux/usb.h index d3d0c137433..5d258c3180a 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -953,6 +953,18 @@ extern int usb_register_driver(struct usb_driver *, struct module *, extern void usb_deregister(struct usb_driver *); +/** + * module_usb_driver() - Helper macro for registering a USB driver + * @__usb_driver: usb_driver struct + * + * Helper macro for USB drivers which do not do anything special in module + * init/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_usb_driver(__usb_driver) \ + module_driver(__usb_driver, usb_register, \ + usb_deregister) + extern int usb_register_device_driver(struct usb_device_driver *, struct module *); extern void usb_deregister_device_driver(struct usb_device_driver *);