Merge branch 'mptcp-misc-updates-for-tests-lock-annotation'

Mat Martineau says:

====================
mptcp: Misc. updates for tests & lock annotation

Here are two fixes we've collected in the mptcp tree.

Patch 1 refactors a MPTCP selftest script to allow running a subset of
the tests.

Patch 2 adds some locking & might_sleep assertations.
====================

Link: https://lore.kernel.org/r/20210204232330.202441-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>