Merge 3.18.122 into android-3.18

Changes in 3.18.122
	spi: davinci: fix a NULL pointer dereference
	powerpc/fadump: handle crash memory ranges array index overflow
	powerpc/pseries: Fix endianness while restoring of r3 in MCE handler.
	9p/virtio: fix off-by-one error in sg list bounds check
	net/9p/client.c: version pointer uninitialized
	net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree()
	dm cache metadata: save in-core policy_hint_size to on-disk superblock
	iio: ad9523: Fix displayed phase
	iio: ad9523: Fix return value for ad952x_store()
	tracing: Do not call start/stop() functions when tracing_on does not change
	tracing/blktrace: Fix to allow setting same value
	kthread, tracing: Don't expose half-written comm when creating kthreads
	uprobes: Use synchronize_rcu() not synchronize_sched()
	9p: fix multiple NULL-pointer-dereferences
	pnfs/blocklayout: off by one in bl_map_stripe()
	ARM: tegra: Fix Tegra30 Cardhu PCA954x reset
	mm/tlb: Remove tlb_remove_table() non-concurrent condition
	osf_getdomainname(): use copy_to_user()
	sys: don't hold uts_sem while accessing userspace memory
	userns; Correct the comment in map_write
	userns: move user access out of the mutex
	ubifs: Fix memory leak in lprobs self-check
	Revert "UBIFS: Fix potential integer overflow in allocation"
	ubifs: Fix synced_i_size calculation for xattr inodes
	pwm: tiehrpwm: Fix disabling of output of PWMs
	fb: fix lost console when the user unplugs a USB adapter
	udlfb: set optimal write delay
	getxattr: use correct xattr length
	bcache: release dc->writeback_lock properly in bch_writeback_thread()
	Linux 3.18.122

Change-Id: I8c562290c78e657b4cdc2df565e57cbd9ed8fa14
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>