Merge android-4.4.155 (b3f777ef) into msm-4.4

* refs/heads/tmp-b3f777ef
  Linux 4.4.155
  drm/drivers: add support for using the arch wc mapping API.
  x86/io: add interface to reserve io memtype for a resource range. (v1.1)
  fs/quota: Fix spectre gadget in do_quotactl
  perf auxtrace: Fix queue resize
  bcache: release dc->writeback_lock properly in bch_writeback_thread()
  getxattr: use correct xattr length
  udlfb: set optimal write delay
  fb: fix lost console when the user unplugs a USB adapter
  pwm: tiehrpwm: Fix disabling of output of PWMs
  ubifs: Fix synced_i_size calculation for xattr inodes
  ubifs: Check data node size before truncate
  Revert "UBIFS: Fix potential integer overflow in allocation"
  ubifs: Fix memory leak in lprobs self-check
  userns: move user access out of the mutex
  sys: don't hold uts_sem while accessing userspace memory
  osf_getdomainname(): use copy_to_user()
  iommu/vt-d: Fix dev iotlb pfsid use
  iommu/vt-d: Add definitions for PFSID
  mm/tlb: Remove tlb_remove_table() non-concurrent condition
  ARM: tegra: Fix Tegra30 Cardhu PCA954x reset
  pnfs/blocklayout: off by one in bl_map_stripe()
  PM / sleep: wakeup: Fix build error caused by missing SRCU support
  9p: fix multiple NULL-pointer-dereferences
  uprobes: Use synchronize_rcu() not synchronize_sched()
  kthread, tracing: Don't expose half-written comm when creating kthreads
  tracing/blktrace: Fix to allow setting same value
  tracing: Do not call start/stop() functions when tracing_on does not change
  vmw_balloon: fix VMCI use when balloon built into kernel
  vmw_balloon: VMCI_DOORBELL_SET does not check status
  vmw_balloon: do not use 2MB without batching
  vmw_balloon: fix inflation of 64-bit GFNs
  iio: ad9523: Fix return value for ad952x_store()
  iio: ad9523: Fix displayed phase
  dm cache metadata: save in-core policy_hint_size to on-disk superblock
  x86/mm/pat: Fix L1TF stable backport for CPA, 2nd call
  net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree()
  net/9p/client.c: version pointer uninitialized
  9p/virtio: fix off-by-one error in sg list bounds check
  fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
  powerpc/pseries: Fix endianness while restoring of r3 in MCE handler.
  powerpc/fadump: handle crash memory ranges array index overflow
  drm/i915/userptr: reject zero user_size
  spi: davinci: fix a NULL pointer dereference
  net: lan78xx: Fix misplaced tasklet_schedule() call
  9p/net: Fix zero-copy path in the 9p virtio transport
  net: mac802154: tx: expand tailroom if necessary
  net: 6lowpan: fix reserved space for single frames
  BACKPORT: arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW
  ANDROID: arm64: mm: fix 4.4.154 merge

Change-Id: Id5969245c97b88f9618cb6123e992ea4540ca434
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>