Utopic update to v3.16.7 stable release

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from Linus' tree or in a minimally
       backported form of that patch. The v3.16.7 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches are in the v3.16.7 stable release:

btrfs: wake up transaction thread from SYNC_FS ioctl
btrfs: Fix a deadlock in btrfs_dev_replace_finishing()
Btrfs: add missing compression property remove in btrfs_ioctl_setflags
Btrfs: fix up bounds checking in lseek
Btrfs: don't do async reclaim during log replay
Btrfs: try not to ENOSPC on log replay
Btrfs: cleanup error handling in build_backref_tree
Btrfs: fix build_backref_tree issue with multiple shared blocks
Btrfs: fix race in WAIT_SYNC ioctl
usb: pch_udc: usb gadget device support for Intel Quark X1000
pci_ids: Add support for Intel Quark ILB
kvm: x86: fix stale mmio cache bug
kvm: fix potentially corrupt mmio cache
KVM: do not bias the generation number in kvm_current_mmio_generation
KVM: s390: unintended fallthrough for external call
kvm: don't take vcpu mutex for obviously invalid vcpu ioctls
x86,kvm,vmx: Preserve CR4 across VM entry
x86/intel/quark: Switch off CR4.PGE so TLB flush uses CR3 instead
spi: dw-mid: respect 8 bit mode
spi: dw-mid: check that DMA was inited before exit
HID: rmi: check sanity of the incoming report
mpc85xx_edac: Make L2 interrupt shared too
regmap: debugfs: fix possbile NULL pointer dereference
regmap: fix NULL pointer dereference in _regmap_write/read
regmap: fix possible ZERO_SIZE_PTR pointer dereferencing error.
be2iscsi: check ip buffer before copying
regulator: ltc3589: fix broken voltage transitions
qla2xxx: fix kernel NULL pointer access
qla2xxx: Use correct offset to req-q-out for reserve calculation
qla2xxx: Fix shost use-after-free on device removal
dmaengine: fix xor sources continuation
firmware_class: make sure fw requests contain a name
arm64: debug: don't re-enable debug exceptions on return from el1_dbg
Drivers: hv: util: Properly pack the data for file copy functionality
Drivers: hv: vmbus: Cleanup vmbus_post_msg()
Drivers: hv: vmbus: Cleanup vmbus_teardown_gpadl()
Drivers: hv: vmbus: Cleanup vmbus_close_internal()
Drivers: hv: vmbus: Cleanup vmbus_establish_gpadl()
Drivers: hv: vmbus: Fix a bug in vmbus_open()
Drivers: hv: vmbus: Cleanup hv_post_message()
mei: bus: fix possible boundaries violation
m68k: Disable/restore interrupts in hwreg_present()/hwreg_write()
Fixing lease renewal
Documentation: lzo: document part of the encoding
Revert "lzo: properly check for overruns"
lzo: check for length overrun in variable length encoding.
tty: omap-serial: fix division by zero
NFSv4: Fix lock recovery when CREATE_SESSION/SETCLIENTID_CONFIRM fails
NFSv4: fix open/lock state recovery error handling
NFSv4.1: Fix an NFSv4.1 state renewal regression
nfsd4: reserve adequate space for LOCK op
NFS: Fix an uninitialised pointer Oops in the writeback error path
NFS: Fix a bogus warning in nfs_generic_pgio
iwlwifi: mvm: disable BT Co-running by default
iwlwifi: Add missing PCI IDs for the 7260 series
spi: dw-mid: terminate ongoing transfers at exit
PCI: mvebu: Fix uninitialized variable in mvebu_get_tgt_attr()
PCI: Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources()
PCI: Increase IBM ipr SAS Crocodile BARs to at least system page size
PCI: Generate uppercase hex for modalias interface class
rt2800: correct BBP1_TX_POWER_CTRL mask
Revert "ath9k_hw: reduce ANI firstep range for older chips"
Bluetooth: Fix HCI H5 corrupted ack value
Bluetooth: Fix incorrect LE CoC PDU length restriction based on HCI MTU
Bluetooth: Fix issue with USB suspend in btusb driver
Bluetooth: Fix setting correct security level when initiating SMP
mm: clear __GFP_FS when PF_MEMALLOC_NOIO is set
fanotify: enable close-on-exec on events' fd when requested in fanotify_init()
kernel: add support for gcc 5
rtc-cmos: fix wakeup from S5 without CONFIG_PM_SLEEP
futex: Ensure get_futex_key_refs() always implies a barrier
powerpc/iommu/ddw: Fix endianness
powerpc/eeh: Clear frozen device state in time
ima: fix fallback to use new_sync_read()
ima: provide flag to identify new empty files
arm64: compat: fix compat types affecting struct compat_elf_prpsinfo
ALSA: pcm: use the same dma mmap codepath both for arm and arm64
ALSA: bebob: Fix failure to detect source of clock for Terratec Phase 88
ALSA: emu10k1: Fix deadlock in synth voice lookup
ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume
ALSA: usb-audio: Add support for Steinberg UR22 USB interface
ALSA: hda - hdmi: Fix missing ELD change event on plug/unplug
ALSA: hda - Fix inverted LED gpio setup for Lenovo Ideapad
ALSA: hda - Add missing terminating entry to SND_HDA_PIN_QUIRK macro
ARM: at91/dt: Fix typo regarding can0_clk
ARM: at91: fix at91sam9263ek DT mmc pinmuxing settings
ARM: at91/PMC: don't forget to write PMC_PCDR register to disable clocks
ARM: Kirkwood: Fix DT based DSA.
ARM: mvebu: Netgear RN104: Use Hardware BCH ECC
ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC
ARM: mvebu: Netgear RN102: Use Hardware BCH ECC
ARM: dts: imx28-evk: Let i2c0 run at 100kHz
ecryptfs: avoid to access NULL pointer when write metadata in xattr
xfs: ensure WB_SYNC_ALL writeback handles partial pages correctly
sparc64: Do not disable interrupts in nmi_cpu_busy()
sparc64: Fix pcr_ops initialization and usage bugs.
sparc32: dma_alloc_coherent must honour gfp flags
sparc64: sun4v TLB error power off events
sparc64: Fix corrupted thread fault code.
sparc64: find_node adjustment
sparc64: Move request_irq() from ldc_bind() to ldc_alloc()
sparc: Let memset return the address argument
sparc: bpf_jit: fix support for ldx/stx mem and SKF_AD_VLAN_TAG
sparc: bpf_jit: fix loads from negative offsets
sparc64: Fix reversed start/end in flush_tlb_kernel_range()
sparc64: Fix lockdep warnings on reboot on Ultra-5
sparc64: Fix FPU register corruption with AES crypto offload.
sparc64: Do not define thread fpregs save area as zero-length array.
sparc64: Fix hibernation code refrence to PAGE_OFFSET.
sparc64: correctly recognise M6 and M7 cpu type
sparc64: support M6 and M7 for building CPU distribution map
sparc64: cpu hardware caps support for sparc M6 and M7
sparc64: T5 PMU
sparc64: Switch to 4-level page tables.
sparc64: Define VA hole at run time, rather than at compile time.
sparc64: Adjust KTSB assembler to support larger physical addresses.
sparc64: Fix physical memory management regressions with large max_phys_bits.
sparc64: Use kernel page tables for vmemmap.
sparc64: Increase MAX_PHYS_ADDRESS_BITS to 53.
sparc64: Adjust vmalloc region size based upon available virtual address bits.
sparc64: sparse irq
sparc64: Kill unnecessary tables and increase MAX_BANKS.
sparc64: Increase size of boot string to 1024 bytes
sparc64: Fix register corruption in top-most kernel stack frame during boot.
sparc64: Implement __get_user_pages_fast().
Linux 3.16.7