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usb: common: add define of usb_speed_string()

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There is only declaration of usb_speed_string(), but no definition,
so add it to avoid build error when call it.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Chunfeng Yun 2020-10-14 15:08:28 +08:00 • committed by Marek Vasut
parent a4de6e380f
commit d92e866f60
2 changed files with 7 additions and 4 deletions
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4
include/linux/usb/ch9.h
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@ -959,8 +959,6 @@ enum usb_device_speed {
USB_SPEED_SUPER_PLUS, /* usb 3.1 */
};
#ifdef __KERNEL__
/**
* usb_speed_string() - Returns human readable-name of the speed.
* @speed: The speed to return human-readable name for. If it's not
@ -969,8 +967,6 @@ enum usb_device_speed {
*/
extern const char *usb_speed_string(enum usb_device_speed speed);
#endif
enum usb_device_state {
/* NOTATTACHED isn't in the USB spec, and this state acts
* the same as ATTACHED ... but it's clearer this way.