Merge 3.18.54 into android-3.18

Changes in 3.18.54
	target/fileio: Fix zero-length READ and WRITE handling
	usb: host: xhci: print correct command ring address
	USB: serial: ftdi_sio: add device ID for Microsemi/Arrow SF2PLUS Dev Kit
	USB: Proper handling of Race Condition when two USB class drivers try to call init_usb_class simultaneously
	staging: vt6656: use off stack for in buffer USB transfers.
	staging: vt6656: use off stack for out buffer USB transfers.
	staging: gdm724x: gdm_mux: fix use-after-free on module unload
	staging: comedi: jr3_pci: fix possible null pointer dereference
	staging: comedi: jr3_pci: cope with jiffies wraparound
	usb: misc: add missing continue in switch
	usb: hub: Do not attempt to autosuspend disconnected devices
	usb: misc: legousbtower: Fix buffers on stack
	x86/boot: Fix BSS corruption/overwrite bug in early x86 kernel startup
	um: Fix PTRACE_POKEUSER on x86_64
	dm era: save spacemap metadata root after the pre-commit
	IB/IPoIB: ibX: failed to create mcg debug file
	IB/mlx4: Fix ib device initialization error flow
	fs/xattr.c: zero out memory copied to userspace in getxattr
	ceph: fix memory leak in __ceph_setxattr()
	fs/block_dev: always invalidate cleancache in invalidate_bdev()
	Set unicode flag on cifs echo request to avoid Mac error
	SMB3: Work around mount failure when using SMB3 dialect to Macs
	CIFS: fix mapping of SFM_SPACE and SFM_PERIOD
	CIFS: add misssing SFM mapping for doublequote
	padata: free correct variable
	md/raid1: avoid reusing a resync bio after error handling.
	serial: omap: fix runtime-pm handling on unbind
	serial: omap: suspend device on probe errors
	Bluetooth: Fix user channel for 32bit userspace on 64bit kernel
	arm64: make sys_call_table const
	perf: Fix event->ctx locking
	arm64: perf: reject groups spanning multiple HW PMUs
	perf: Fix race in swevent hash
	ASN.1: Fix non-match detection failure on data overrun
	KEYS: Fix ASN.1 indefinite length object parsing
	ext4: fix potential use after free in __ext4_journal_stop
	sg: Fix double-free when drives detach during SG_IO
	ipv6: sctp: add rcu protection around np->opt
	ipv6: sctp: fix lockdep splat in sctp_v6_get_dst()
	af_unix: Guard against other == sk in unix_dgram_sendmsg
	ppp: defer netns reference release for ppp channel
	HID: core: prevent out-of-bound readings
	cdc_ncm: do not call usbnet_link_change from cdc_ncm_bind
	sched: panic on corrupted stack end
	ALSA: seq: Fix race at timer setup and close
	ALSA: timer: Fix race among timer ioctls
	ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS
	ALSA: timer: Fix leak in events via snd_timer_user_ccallback
	ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt
	Linux 3.18.54

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