On Mon, 26 Mar 2012, Greg KH wrote:

On Mon, Mar 26, 2012 at 09:58:36AM -0700, Randy Dunlap wrote:

quoted

On 03/25/2012 09:28 PM, Stephen Rothwell wrote:

quoted

Hi all,

Reminder: please do not add stuff destined for v3.5 to linux-next
included trees/branches until after v3.4-rc1 has been released.

Changes since 20120323:

on x86_64:

ERROR: "utf16s_to_utf8s" [drivers/usb/core/usbcore.ko] undefined!
ERROR: "usb_speed_string" [drivers/usb/core/usbcore.ko] undefined!

Full randconfig file is attached.

Odd, nothing in the usb core has changed in a while in this area,
although we might have gotten some core dependancies mixed up for random
configurations like this.

This is puzzling.

	utf16s_to_utf8s is defined in fs/nls/nls_base.c,
	which is built according to CONFIG_NLS (in fs/nls/Makefile),
	which is selected by CONFIG_USB (in drivers/usb/Kconfig).

But the config that Randy attached had CONFIG_USB set to M and 
CONFIG_NLS not set.  How is that possible?

	usb_speed_string is defined in drivers/usb/usb-common.c,
	which is built according to CONFIG_USB_COMMON (in
		drivers/usb/Makefile),
	which defaults to Y if CONFIG_USB_SUPPORT and either
		CONFIG_USB or CONFIG_USB_GADGET is set (in 
		drivers/usb/Kconfig).

The problem here was that CONFIG_USB_SUPPORT isn't set but CONFIG_USB
is set to M.  This used not to be possible, since CONFIG_USB was
defined inside an "if USB_SUPPORT" section.  Maybe that got changed and
needs to be fixed (but
https://git.kernel.org/?p=linux/kernel/git/next/linux-next.git thinks
it's still not possible).  Or maybe Randy's tree is a little out of 
date.

Alan Stern