Merge Linux 4.4.244 kernel

Changes in 4.4.244: (64 commits)
        ring-buffer: Fix recursion protection transitions between interrupt context
        gfs2: Wake up when sd_glock_disposal becomes zero
        mm: mempolicy: fix potential pte_unmap_unlock pte error
        time: Prevent undefined behaviour in timespec64_to_ns()
        btrfs: reschedule when cloning lots of extents
        net: xfrm: fix a race condition during allocing spi
        perf tools: Add missing swap for ino_generation
        ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
        can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context
        can: dev: __can_get_echo_skb(): fix real payload length return value for RTR frames
        can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
        can: peak_usb: add range checking in decode operations
        can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
        Btrfs: fix missing error return if writeback for extent buffer never started
        pinctrl: devicetree: Avoid taking direct reference to device name string
        i40e: Wrong truncation from u16 to u8
        i40e: Fix of memory leak and integer truncation in i40e_virtchnl.c
        geneve: add transport ports in route lookup for geneve
        ath9k_htc: Use appropriate rs_datalen type
        usb: gadget: goku_udc: fix potential crashes in probe
        gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
        gfs2: check for live vs. read-only file system in gfs2_fitrim
        drm/amdgpu: perform srbm soft reset always on SDMA resume
        mac80211: fix use of skb payload instead of header
        cfg80211: regulatory: Fix inconsistent format argument
        iommu/amd: Increase interrupt remapping table limit to 512 entries
        xfs: fix a missing unlock on error in xfs_fs_map_blocks
        of/address: Fix of_node memory leak in of_dma_is_coherent
        cosa: Add missing kfree in error path of cosa_write
        perf: Fix get_recursion_context()
        ext4: correctly report "not supported" for {usr,grp}jquota when !CONFIG_QUOTA
        ext4: unlock xattr_sem properly in ext4_inline_data_truncate()
        usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode
        mei: protect mei_cl_mtu from null dereference
        ocfs2: initialize ip_next_orphan
        don't dump the threads that had been already exiting when zapped.
        drm/gma500: Fix out-of-bounds access to struct drm_device.vblank[]
        pinctrl: amd: use higher precision for 512 RtcClk
        pinctrl: amd: fix incorrect way to disable debounce filter
        swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
        IPv6: Set SIT tunnel hard_header_len to zero
        net/af_iucv: fix null pointer dereference on shutdown
        net/x25: Fix null-ptr-deref in x25_connect
        net: Update window_clamp if SOCK_RCVBUF is set
        random32: make prandom_u32() output unpredictable
        x86/speculation: Allow IBPB to be conditionally enabled on CPUs with always-on STIBP
        xen/events: avoid removing an event channel while handling it
        xen/events: add a proper barrier to 2-level uevent unmasking
        xen/events: fix race in evtchn_fifo_unmask()
        xen/events: add a new "late EOI" evtchn framework
        xen/blkback: use lateeoi irq binding
        xen/netback: use lateeoi irq binding
        xen/scsiback: use lateeoi irq binding
        xen/pciback: use lateeoi irq binding
        xen/events: switch user event channels to lateeoi model
        xen/events: use a common cpu hotplug hook for event channels
        xen/events: defer eoi in case of excessive number of events
        xen/events: block rogue events for some time
        perf/core: Fix race in the perf_mmap_close() function
        Revert "kernel/reboot.c: convert simple_strtoul to kstrtoint"
        reboot: fix overflow parsing reboot cpu number
        ext4: fix leaking sysfs kobject after failed mount
        Convert trailing spaces and periods in path components
        Linux 4.4.244