MODULE_LICENSE("GPL") not working for me

From: Stephen Williams
Date: Thu Oct 06 2011 - 18:30:41 EST

I have some large drivers for use in embedded arm systems, and
I want them to be GPL, because I want to use some symbols exported
as GPL, and also because I just wanna. But it is not working for
me. I've attached my Makefile. I'm building from outside the kernel
tree, but that should be OK. (right?) I'm using the following script to
actually build:

make KERNELDIR=$SE0/linux-2.6.33-quatro ARCH=arm modules

But no matter what I do, when I try to load my module, I get
errors line this:

# insmod ./vidfor2.ko
vidfor: module license 'unspecified' taints kernel.
Disabling lock debugging due to kernel taint
vidfor: Unknown symbol driver_remove_file
vidfor: Unknown symbol driver_create_file
insmod: can't insert './vidfor2.ko': unknown symbol in module or
invalid parameter

I have a MODULE_LICENSE("GPL"); line in the "linux.c" source file,
and the pertinent parts of the makefile are here:

OBJ := linux.o ops.o console.o sysfs.o ident_tables.o
LIBOBJ := vidforio.o init.o format.o video.o isr.o version.o


EXTRA_CFLAGS += -I$(M)/../libvidforio
obj-m += vidfor.o
vidfor-objs := $(OBJ) $(patsubst %,../libvidforio/%,$(LIBOBJ))


What's the trick for getting the MODULE_LICENSE successfully stamped
into my generated .ko file?

I've googled the list and the internet in general, and found
as many relevant examples as I could in the kernel source, but
I'm at wit's end. I'm not subscribed, so please CC responses,
although I will check back often.

Steve Williams                "The woods are lovely, dark and deep.
steve at           But I have promises to keep, ;        and lines to code before I sleep, ;      And lines to code before I sleep."

Attachment: Makefile
Description: Binary data