[PATCH -next] usb: add usb.h stubs for CONFIG_USB not enabled

[Sergei Shtylyov]

Hello.

On 19-05-2012 6:04, Randy Dunlap wrote:

> From: Randy Dunlap<rdunlap at xenotime.net>

> Add stubs for some usb core functions when CONFIG_USB
> is not enabled.  This fixes these comedi build errors:

> ERROR: "usb_deregister" [drivers/staging/comedi/comedi.ko] undefined!
> ERROR: "usb_register_driver" [drivers/staging/comedi/comedi.ko] undefined!

> Signed-off-by: Randy Dunlap<rdunlap at xenotime.net>
> ---
> I am only adding the stubs that are needed for comedi to build.
> I expect that more stubs will be needed as more build errors are
> found.  It seems to me that linux/usb.h might need more (major)
> moving of lines to support more stubs in the future.

>   Documentation/usb/error-codes.txt |    2 ++
>   include/linux/usb.h               |   24 +++++++++++++++++++++++-
>   2 files changed, 25 insertions(+), 1 deletion(-)
>
> --- linux-next-20120518.orig/include/linux/usb.h
> +++ linux-next-20120518/include/linux/usb.h
> @@ -10,7 +10,7 @@
>
>   #ifdef __KERNEL__
>
> -#include<linux/errno.h>         /* for -ENODEV */
> +#include<linux/errno.h>         /* for -ENODEV, -ENOSYS */
>   #include<linux/delay.h>	/* for mdelay() */
>   #include<linux/interrupt.h>	/* for in_interrupt() */
>   #include<linux/list.h>		/* for struct list_head */
> @@ -515,6 +515,8 @@ static inline struct usb_device *interfa
>   	return to_usb_device(intf->dev.parent);
>   }
>
> +#if defined(CONFIG_USB) || defined(CONFIG_USB_MODULE)

    You can use IS_ENABLED(CONFIG_USB) instead of these two now.

WBR, Sergei