FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit c54419321455631079c7d6e60bc732dd0c5914c5 ("GRE: Refactor GRE tunneling code.")

After the commit, we found the following message in kernel log:

[    1.935578] IP-Config: Failed to open gretap0

I think that may make some user confused.

Thanks,
Ying Huang