Merge 3.18.56 into android-3.18

Changes in 3.18.56
	Revert "stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms"
	netem: fix skb_orphan_partial()
	dccp/tcp: do not inherit mc_list from parent
	s390/qeth: handle sysfs error during initialization
	s390/qeth: unbreak OSM and OSN support
	s390/qeth: avoid null pointer dereference on OSN
	tcp: avoid fragmenting peculiar skbs in SACK
	sctp: fix src address selection if using secondary addresses for ipv6
	sctp: do not inherit ipv6_{mc|ac|fl}_list from parent
	tcp: eliminate negative reordering in tcp_clean_rtx_queue
	ipv6: Prevent overrun when parsing v6 header options
	ipv6: Check ip6_find_1stfragopt() return value properly.
	qmi_wwan: add another Lenovo EM74xx device ID
	ipv6: fix out of bound writes in __ip6_append_data()
	tcp: avoid fastopen API to be used on AF_UNSPEC
	sctp: fix ICMP processing if skb is non-linear
	i2c: i2c-tiny-usb: fix buffer not being DMA capable
	drm/radeon/ci: disable mclk switching for high refresh rates (v2)
	pcmcia: remove left-over %Z format
	ALSA: hda - apply STAC_9200_DELL_M22 quirk for Dell Latitude D430
	slub/memcg: cure the brainless abuse of sysfs attributes
	drm/gma500/psb: Actually use VBT mode when it is found
	mm/migrate: fix refcount handling when !hugepage_migration_supported()
	mlock: fix mlock count can not decrease in race condition
	xfs: Fix missed holes in SEEK_HOLE implementation
	xfs: fix off-by-one on max nr_pages in xfs_find_get_desired_pgoff()
	xfs: fix over-copying of getbmap parameters from userspace
	xfs: handle array index overrun in xfs_dir2_leaf_readbuf()
	xfs: prevent multi-fsb dir readahead from reading random blocks
	xfs: fix up quotacheck buffer list error handling
	xfs: fix indlen accounting error on partial delalloc conversion
	xfs: bad assertion for delalloc an extent that start at i_size
	xfs: fix unaligned access in xfs_btree_visit_blocks
	Linux 3.18.56

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>