Merge Linux 4.4.258 kernel

Changes in 4.4.258: (36 commits)
        tracing: Do not count ftrace events in top level enable output
        fgraph: Initialize tracing_graph_pause at task creation
        af_key: relax availability checks for skb size calculation
        iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap
        iwlwifi: mvm: guard against device removal in reprobe
        SUNRPC: Move simple_get_bytes and simple_get_netobj into private header
        SUNRPC: Handle 0 length opaque XDR object data properly
        lib/string: Add strscpy_pad() function
        include/trace/events/writeback.h: fix -Wstringop-truncation warnings
        memcg: fix a crash in wb_workfn when a device disappears
        squashfs: add more sanity checks in id lookup
        squashfs: add more sanity checks in inode lookup
        squashfs: add more sanity checks in xattr id lookup
        memblock: do not start bottom-up allocations with kernel_end
        netfilter: xt_recent: Fix attempt to update deleted entry
        h8300: fix PREEMPTION build, TI_PRE_COUNT undefined
        usb: dwc3: ulpi: fix checkpatch warning
        usb: dwc3: ulpi: Replace CPU-based busyloop with Protocol-based one
        net: watchdog: hold device global xmit lock during tx disable
        vsock: fix locking in vsock_shutdown()
        x86/build: Disable CET instrumentation in the kernel for 32-bit too
        trace: Use -mcount-record for dynamic ftrace
        tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount
        tracing: Avoid calling cc-option -mrecord-mcount for every Makefile
        Xen/x86: don't bail early from clear_foreign_p2m_mapping()
        Xen/x86: also check kernel mapping in set_foreign_p2m_mapping()
        Xen/gntdev: correct dev_bus_addr handling in gntdev_map_grant_pages()
        Xen/gntdev: correct error checking in gntdev_map_grant_pages()
        xen/arm: don't ignore return errors from set_phys_to_machine
        xen-blkback: don't "handle" error by BUG()
        xen-netback: don't "handle" error by BUG()
        xen-scsiback: don't "handle" error by BUG()
        xen-blkback: fix error handling in xen_blkbk_map()
        scsi: qla2xxx: Fix crash during driver load on big endian machines
        kvm: check tlbs_dirty directly
        Linux 4.4.258

Conflicts:
	mm/memblock.c