[SRU][Xenial][PULL] Xenial update: v4.4.255 upstream stable release

[Kamal Mostafa]

This pull request (30 commits) includes the following Xenial stable patchsets:

	Xenial update: v4.4.255 upstream stable release
	https://bugs.launchpad.net/bugs/1916656

Note also that the 'stable-next' branch head contains this and all prior
pending upstream stable releases.  I recommend fetching and applying just this
reference ('stable-next') instead of each tags/xenial-stable-v4.4.xx reference:

   git://kernel.ubuntu.com/ubuntu-stable/ubuntu-stable-xenial.git stable-next

 -Kamal

-----

The following changes since commit 88ac5429fc5a5955b219c75dfcf32835ef5b0382:

  UBUNTU: Ubuntu-4.4.0-204.236 (2021-02-19 14:31:18 +0100)

are available in the Git repository at:

  git://kernel.ubuntu.com/ubuntu-stable/ubuntu-stable-xenial.git tags/xenial-stable-v4.4.255

for you to fetch changes up to 0d32785a6cf96ab668bf0e4a8f371d3c794da0ea:

  UBUNTU: upstream stable to v4.4.255 (2021-02-23 12:52:12 -0800)

----------------------------------------------------------------
Arnd Bergmann (1):
      y2038: futex: Move compat implementation into futex.c

Bartosz Golaszewski (1):
      iommu/vt-d: Don't dereference iommu_device if IOMMU_API is not built

Dan Carpenter (1):
      can: dev: prevent potential information leak in can_fill_info()

David Woodhouse (1):
      iommu/vt-d: Gracefully handle DMAR units with no supported address widths

Giacinto Cifelli (1):
      net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family

Greg Kroah-Hartman (1):
      Linux 4.4.255

Johannes Berg (2):
      wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
      mac80211: pause TX while changing interface type

Kai-Heng Feng (1):
      ACPI: sysfs: Prefer "compatible" modalias

Kamal Heib (1):
      RDMA/cxgb4: Fix the reported max_recv_sge value

Kamal Mostafa (1):
      UBUNTU: upstream stable to v4.4.255

Like Xu (1):
      KVM: x86/pmu: Fix HW_REF_CPU_CYCLES event pseudo-encoding in intel_arch_events[]

Lorenzo Bianconi (2):
      mt7601u: fix kernel crash unplugging the device
      mt7601u: fix rx buffer refcounting

Max Krummenacher (1):
      ARM: imx: build suspend-imx6.S with arm instruction set

Pablo Neira Ayuso (1):
      netfilter: nft_dynset: add timeout extension to template

Pan Bian (2):
      NFC: fix resource leak when target index is invalid
      NFC: fix possible resource leak

Shmulik Ladkani (1):
      xfrm: Fix oops in xfrm_replay_advance_bmp

Thomas Gleixner (11):
      futex: Move futex exit handling into futex code
      futex: Replace PF_EXITPIDONE with a state
      exit/exec: Seperate mm_release()
      futex: Split futex_mm_release() for exit/exec
      futex: Set task::futex_state to DEAD right after handling futex exit
      futex: Mark the begin of futex exit explicitly
      futex: Sanitize exit state handling
      futex: Provide state handling for exec() as well
      futex: Add mutex around futex exit
      futex: Provide distinct return value when owner is exiting
      futex: Prevent exit livelock

 Makefile                                    |   2 +-
 arch/arm/mach-imx/suspend-imx6.S            |   1 +
 arch/x86/kvm/pmu_intel.c                    |   2 +-
 debian.master/upstream-stable               |   2 +-
 drivers/acpi/device_sysfs.c                 |  20 +-
 drivers/infiniband/hw/cxgb4/qp.c            |   2 +-
 drivers/iommu/dmar.c                        |  43 ++-
 drivers/net/can/dev.c                       |   2 +-
 drivers/net/usb/qmi_wwan.c                  |   1 +
 drivers/net/wireless/mediatek/mt7601u/dma.c |   5 +-
 fs/exec.c                                   |   2 +-
 include/linux/compat.h                      |   2 -
 include/linux/futex.h                       |  44 ++-
 include/linux/intel-iommu.h                 |   2 +
 include/linux/sched.h                       |   9 +-
 kernel/Makefile                             |   3 -
 kernel/exit.c                               |  25 +-
 kernel/fork.c                               |  40 +--
 kernel/futex.c                              | 446 ++++++++++++++++++++++++++--
 kernel/futex_compat.c                       | 201 -------------
 net/mac80211/ieee80211_i.h                  |   1 +
 net/mac80211/iface.c                        |   6 +
 net/netfilter/nft_dynset.c                  |   4 +-
 net/nfc/netlink.c                           |   1 +
 net/nfc/rawsock.c                           |   2 +-
 net/wireless/wext-core.c                    |   5 +-
 net/xfrm/xfrm_input.c                       |   2 +-
 27 files changed, 526 insertions(+), 349 deletions(-)
 delete mode 100644 kernel/futex_compat.c