Work around for GPL-only symbol '__rcu_read_unlock'?

[Ponyo3]

When building a kernel module for Intel x86 Kernel 2.6.26.8-rt16,

"FATAL: modpost: GPL-incompatible module
sample.ko uses GPL-only symbol '__rcu_read_unlock'"
appears.

Let us know any work around for this error message.

In case of the same kernel version without RT patch, no error message occurs.

Regards,

[trutheality]

Make the module GPL and set the appropriate lisence constant.

[Ponyo3]

Hi all,

in_dev_get() and in6_dev_get() are not GPL functions.
However, they are used on Linux Kernel with RealTime Patch,
the error message,
"FATAL: modpost: GPL-incompatible module
sample.ko uses GPL-only symbol '__rcu_read_unlock'"
appears.

Is there any Non-GPL function that can be used instead of in_dev_get/in6_dev_get?
Is it possible to remove the GPL function "__rcu_read_unlock"
from in_dev_get/in6_dev_get ?

Regards.