Version 7.1 is available upstream. Please consider updating! It seems that version 7.1 is available upstream, while the latest version in the Gentoo tree is 7.0-r1. You think this warning is false? Read more about it here.
The in-kernel CIFS filesystem relies on a set of user-space
tools. That package of tools is called cifs-utils. Although not
really part of Samba proper, these tools were originally part of
the Samba package. For several reasons, shipping these tools as
part of Samba was problematic and it was deemed better to split
them off into their own package