headers/deps: USB: Optimize <linux/usb/ch9.h> dependencies, remove <linux/device.h>

The <linux/usb/ch9.h> header is used over 1,400 times in a typical distro
build, but few of its users actually need the full <linux/device.h> header.

          --------------------------------------------------------------------
          | Combined, preprocessed C code size of header, without line markers,
          | with comments stripped:
          -------------------------
  before: | #include <linux/usb/ch9.h>              | LOC:  7,078 | headers:  172
   after: | #include <linux/usb/ch9.h>              | LOC:    812 | headers:   38

Remove it and add it to the places that need it.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 1cffa34..969e7db 100644 (file)
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -33,7 +33,6 @@
 #ifndef __LINUX_USB_CH9_H
 #define __LINUX_USB_CH9_H
 
-#include <linux/device.h>
 #include <uapi/linux/usb/ch9.h>
 
 /* USB 3.2 SuperSpeed Plus phy signaling rate generation and lane count */
@@ -45,6 +44,8 @@ enum usb_ssp_rate {
        USB_SSP_GEN_2x2,
 };
 
+struct device;
+
 extern const char *usb_ep_type_string(int ep_type);
 extern const char *usb_speed_string(enum usb_device_speed speed);
 extern enum usb_device_speed usb_get_maximum_speed(struct device *dev);