Merge tag 'v4.9.217' into khadas-vims-4.9.y

This is the 4.9.217 stable release

diff --cc Documentation/kernel-parameters.txt
Simple merge

diff --cc Makefile
Simple merge

diff --cc drivers/net/phy/phy_device.c
Simple merge

diff --cc fs/open.c
Simple merge

diff --cc include/net/fib_rules.h
Simple merge

diff --cc kernel/cgroup.c
Simple merge

diff --cc kernel/workqueue.c
Simple merge

diff --cc mm/slub.c
Simple merge

diff --cc net/ipv6/addrconf.c
Simple merge