Merge branch 'pernet_operations-convert-part-3'

Kirill Tkhai says:

====================
Converting pernet_operations (part #3)

This patchset continues to review and to convert pernet_operations
to async. Where it is possible, they are grouped by type of actions
init/exit methods ([1/28], for example). I hope this will make
the review a little bit easier. The changes are tree-wide: in net, fs,
drivers and security.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>