Vivid update to 3.19.8-ckt9 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 3.19.8-ckt9 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://kernel.ubuntu.com/ubuntu/linux.git

    TEST CASE: TBD

       The following patches are in the 3.19.8-ckt9 stable release:

sctp: donot reset the overall_error_count in SHUTDOWN_RECEIVE state
KEYS: Fix race between key destruction and finding a keyring by name
KEYS: Fix crash when attempt to garbage collect an uninstantiated keyring
KEYS: Don't permit request_key() to construct a new keyring
spi: spi-pxa2xx: Check status register to determine if SSSR_TINT is disabled
spi: Fix documentation of spi_alloc_master()
ARM: 8429/1: disable GCC SRA optimization
powerpc/MSI: Fix race condition in tearing down MSI interrupts
CIFS: fix type confusion in copy offload ioctl
hwmon: (nct6775) Swap STEP_UP_TIME and STEP_DOWN_TIME registers for most chips
time: Fix timekeeping_freqadjust()'s incorrect use of abs() instead of abs64()
USB: option: add ZTE PIDs
drm/vmwgfx: Fix up user_dmabuf refcounting
KVM: arm64: add workaround for Cortex-A57 erratum #852523
x86/apic: Serialize LVTT and TSC_DEADLINE writes
ARM: dts: omap3-beagle: make i2c3, ddc and tfp410 gpio work again
Btrfs: fix read corruption of compressed and shared extents
btrfs: skip waiting on ordered range for special files
usb: chipidea: udc: using the correct stall implementation
cxl: Fix unbalanced pci_dev_get in cxl_probe
arm64: head.S: initialise mdcr_el2 in el2_setup
kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
kvm: factor out core eventfd assign/deassign logic
kvm: fix double free for fast mmio eventfd
kvm: fix zero length mmio searching
net: mvneta: fix DMA buffer unmapping in mvneta_rx()
iser-target: remove command with state ISTATE_REMOVE
iser-target: Put the reference on commands waiting for unsol data
ARM: fix Thumb2 signal handling when ARMv6 is enabled
powerpc/boot: Specify ABI v2 when building an LE boot wrapper
powerpc/mm: Recompute hash value after a failed update
KVM: vmx: fix VPID is 0000H in non-root operation
arm: KVM: Fix incorrect device to IPA mapping
x86/platform: Fix Geode LX timekeeping in the generic x86 build
arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources
arm64: compat: fix vfp save/restore across signal handlers in big-endian
arm64: errata: add module build workaround for erratum #843419
s390/compat: correct uc_sigmask of the compat signal frame
arm64: KVM: Disable virtual timer even if the guest is not using it
arm: KVM: Disable virtual timer even if the guest is not using it
staging: ion: fix corruption of ion_import_dma_buf
hp-wmi: limit hotkey enable
zram: fix possible use after free in zcomp_create()
sched: access local runqueue directly in single_task_running
KVM: x86: trap AMD MSRs for the TSeg base and mask
usb: Use the USB_SS_MULT() macro to get the burst multiplier.
xhci: give command abortion one more chance before killing xhci
usb: xhci: lock mutex on xhci_stop
usb: xhci: Clear XHCI_STATE_DYING on start
usb: xhci: exit early in xhci_setup_device() if we're halted or dying
xhci: change xhci 1.0 only restrictions to support xhci 1.1
xhci-mem: Use setup_timer
xhci: init command timeout timer earlier to avoid deleting it uninitialized
irqchip/atmel-aic5: Use per chip mask caches in mask/unmask()
spi: xtensa-xtfpga: fix register endianness
disabling oplocks/leases via module parm enable_oplocks broken for SMB3
cifs: use server timestamp for ntlmv2 authentication
x86/paravirt: Replace the paravirt nop with a bona fide empty function
x86/nmi/64: Fix a paravirt stack-clobbering bug in the NMI code
ASoC: pxa: pxa2xx-ac97: fix dma requestor lines
ocfs2/dlm: fix deadlock when dispatch assert master
drm/i915/bios: handle MIPI Sequence Block v3+ gracefully
drm/qxl: only report first monitor as connected if we have no state
[SMB3] Fix sec=krb5 on smb3 mounts
PCI: Fix devfn for VPD access through function 0
PCI: Use function 0 VPD for identical functions, regular VPD for others
spi: spidev: fix possible NULL dereference
perf header: Fixup reading of HEADER_NRCPUS feature
netfilter: nft_compat: skip family comparison in case of NFPROTO_UNSPEC
openvswitch: Zero flows on allocation.
netfilter: nf_log: wait for rcu grace after logger unregistration
ARM: OMAP2+: board-generic: Remove stale of_irq macros
vxlan: set needed headroom correctly
ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
tcp: add proper TS val into RST packets
net/mlx4_en: really allow to change RSS key
macvtap: fix TUNSETSNDBUF values > 64k
ASoC: fix broken pxa SoC support
netfilter: nf_log: don't zap all loggers on unregister
ARM: dts: omap5-uevm.dts: fix i2c5 pinctrl offsets
netlink, mmap: transform mmap skb into full skb on taps
nfs: fix pg_test page count calculation
usbnet: Get EVENT_NO_RUNTIME_PM bit before it is cleared
net: eth: altera: fix napi poll_list corruption
net/ipv6: Correct PIM6 mrt_lock handling
fib_rules: fix fib rule dumps across multiple skbs
Btrfs: update fix for read corruption of compressed and shared extents
drm/vmwgfx: Fix kernel NULL pointer dereference on older hardware
Linux 3.19.8-ckt9