Bionic update to v4.15.5 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 a mainline/stable Linux tree or
       a minimally backported form of that patch. The v4.15.5 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 from the v4.15.5 stable release shall be applied:

scsi: smartpqi: allow static build ("built-in")
IB/umad: Fix use of unprotected device pointer
IB/qib: Fix comparison error with qperf compare/swap test
IB/mlx4: Fix incorrectly releasing steerable UD QPs when have only ETH ports
IB/core: Fix two kernel warnings triggered by rxe registration
IB/core: Fix ib_wc structure size to remain in 64 bytes boundary
IB/core: Avoid a potential OOPs for an unused optional parameter
selftests: seccomp: fix compile error seccomp_bpf
kselftest: fix OOM in memory compaction test
RDMA/rxe: Fix a race condition related to the QP error state
RDMA/rxe: Fix a race condition in rxe_requester()
RDMA/rxe: Fix rxe_qp_cleanup()
cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin
PM / devfreq: Propagate error from devfreq_add_device()
mwifiex: resolve reset vs. remove()/shutdown() deadlocks
ocfs2: try a blocking lock before return AOP_TRUNCATED_PAGE
trace_uprobe: Display correct offset in uprobe_events
powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all
powerpc/kernel: Block interrupts when updating TIDR
powerpc/vas: Don't set uses_vas for kernel windows
powerpc/numa: Invalidate numa_cpu_lookup_table on cpu remove
powerpc/mm: Flush radix process translations when setting MMU type
powerpc/xive: Use hw CPU ids when configuring the CPU queues
dma-buf: fix reservation_object_wait_timeout_rcu once more v2
s390: fix handling of -1 in set{,fs}[gu]id16 syscalls
arm64: dts: msm8916: Correct ipc references for smsm
ARM: lpc3250: fix uda1380 gpio numbers
ARM: dts: STi: Add gpio polarity for "hdmi,hpd-gpio" property
ARM: dts: nomadik: add interrupt-parent for clcd
arm: dts: mt7623: fix card detection issue on bananapi-r2
arm: spear600: Add missing interrupt-parent of rtc
arm: spear13xx: Fix dmas cells
arm: spear13xx: Fix spics gpio controller's warning
x86/gpu: add CFL to early quirks
x86/kexec: Make kexec (mostly) work in 5-level paging mode
x86/xen: init %gs very early to avoid page faults with stack protector
x86: PM: Make APM idle driver initialize polling state
mm, memory_hotplug: fix memmap initialization
x86/entry/64: Clear extra registers beyond syscall arguments, to reduce speculation attack surface
x86/entry/64/compat: Clear registers for compat syscalls, to reduce speculation attack surface
compiler-gcc.h: Introduce __optimize function attribute
compiler-gcc.h: __nostackprotector needs gcc-4.4 and up
crypto: sun4i_ss_prng - fix return value of sun4i_ss_prng_generate
crypto: sun4i_ss_prng - convert lock to _bh in sun4i_ss_prng_generate
powerpc/mm/radix: Split linear mapping on hot-unplug
x86/mm/pti: Fix PTI comment in entry_SYSCALL_64()
x86/speculation: Update Speculation Control microcode blacklist
x86/speculation: Correct Speculation Control microcode blacklist again
Revert "x86/speculation: Simplify indirect_branch_prediction_barrier()"
KVM/x86: Reduce retpoline performance impact in slot_handle_level_range(), by always inlining iterator helper methods
X86/nVMX: Properly set spec_ctrl and pred_cmd before merging MSRs
KVM/nVMX: Set the CPU_BASED_USE_MSR_BITMAPS if we have a valid L02 MSR bitmap
x86/speculation: Clean up various Spectre related details
PM / runtime: Update links_count also if !CONFIG_SRCU
PM: cpuidle: Fix cpuidle_poll_state_init() prototype
platform/x86: wmi: fix off-by-one write in wmi_dev_probe()
x86/entry/64: Clear registers for exceptions/interrupts, to reduce speculation attack surface
x86/entry/64: Merge SAVE_C_REGS and SAVE_EXTRA_REGS, remove unused extensions
x86/entry/64: Merge the POP_C_REGS and POP_EXTRA_REGS macros into a single POP_REGS macro
x86/entry/64: Interleave XOR register clearing with PUSH instructions
x86/entry/64: Introduce the PUSH_AND_CLEAN_REGS macro
x86/entry/64: Use PUSH_AND_CLEAN_REGS in more cases
x86/entry/64: Get rid of the ALLOC_PT_GPREGS_ON_STACK and SAVE_AND_CLEAR_REGS macros
x86/entry/64: Indent PUSH_AND_CLEAR_REGS and POP_REGS properly
x86/entry/64: Fix paranoid_entry() frame pointer warning
x86/entry/64: Remove the unused 'icebp' macro
selftests/x86: Fix vDSO selftest segfault for vsyscall=none
selftests/x86: Clean up and document sscanf() usage
selftests/x86/pkeys: Remove unused functions
selftests/x86: Fix build bug caused by the 5lvl test which has been moved to the VM directory
selftests/x86: Do not rely on "int $0x80" in test_mremap_vdso.c
gfs2: Fixes to "Implement iomap for block_map"
selftests/x86: Do not rely on "int $0x80" in single_step_syscall.c
selftests/x86: Disable tests requiring 32-bit support on pure 64-bit systems
objtool: Fix segfault in ignore_unreachable_insn()
x86/debug, objtool: Annotate WARN()-related UD2 as reachable
x86/debug: Use UD2 for WARN()
x86/speculation: Fix up array_index_nospec_mask() asm constraint
nospec: Move array_index_nospec() parameter checking into separate macro
x86/speculation: Add <asm/msr-index.h> dependency
x86/mm: Rename flush_tlb_single() and flush_tlb_one() to __flush_tlb_one_[user|kernel]()
selftests/x86/mpx: Fix incorrect bounds with old _sigfault
x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping
x86/spectre: Fix an error message
x86/cpu: Change type of x86_cache_size variable to unsigned int
x86/entry/64: Fix CR3 restore in paranoid_exit()
drm/ttm: Don't add swapped BOs to swap-LRU list
drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2)
drm/qxl: unref cursor bo when finished with it
drm/qxl: reapply cursor after resetting primary
drm/amd/powerplay: Fix smu_table_entry.handle type
drm/ast: Load lut in crtc_commit
drm: Check for lessee in DROP_MASTER ioctl
arm64: Add missing Falkor part number for branch predictor hardening
drm/radeon: Add dpm quirk for Jet PRO (v2)
drm/radeon: adjust tested variable
x86/smpboot: Fix uncore_pci_remove() indexing bug when hot-removing a physical CPU
rtc-opal: Fix handling of firmware error codes, prevent busy loops
mbcache: initialize entry->e_referenced in mb_cache_entry_create()
mmc: sdhci: Implement an SDHCI-specific bounce buffer
mmc: bcm2835: Don't overwrite max frequency unconditionally
Revert "mmc: meson-gx: include tx phase in the tuning process"
mlx5: fix mlx5_get_vector_affinity to start from completion vector 0
Revert "apple-gmux: lock iGP IO to protect from vgaarb changes"
jbd2: fix sphinx kernel-doc build warnings
ext4: fix a race in the ext4 shutdown path
ext4: save error to disk in __ext4_grp_locked_error()
ext4: correct documentation for grpid mount option
mm: hide a #warning for COMPILE_TEST
mm: Fix memory size alignment in devm_memremap_pages_release()
MIPS: Fix typo BIG_ENDIAN to CPU_BIG_ENDIAN
MIPS: CPS: Fix MIPS_ISA_LEVEL_RAW fallout
MIPS: Fix incorrect mem=X@Y handling
PCI: Disable MSI for HiSilicon Hip06/Hip07 only in Root Port mode
PCI: iproc: Fix NULL pointer dereference for BCMA
PCI: pciehp: Assume NoCompl+ for Thunderbolt ports
PCI: keystone: Fix interrupt-controller-node lookup
video: fbdev: atmel_lcdfb: fix display-timings lookup
console/dummy: leave .con_font_get set to NULL
rbd: whitelist RBD_FEATURE_OPERATIONS feature bit
xen: Fix {set,clear}_foreign_p2m_mapping on autotranslating guests
xenbus: track caller request id
seq_file: fix incomplete reset on read from zero offset
tracing: Fix parsing of globs with a wildcard at the beginning
mpls, nospec: Sanitize array index in mpls_label_ok()
rtlwifi: rtl8821ae: Fix connection lost problem correctly
arm64: proc: Set PTE_NG for table entries to avoid traversing them twice
xprtrdma: Fix calculation of ri_max_send_sges
xprtrdma: Fix BUG after a device removal
blk-wbt: account flush requests correctly
target/iscsi: avoid NULL dereference in CHAP auth error path
iscsi-target: make sure to wake up sleeping login worker
dm: correctly handle chained bios in dec_pending()
Btrfs: fix deadlock in run_delalloc_nocow
Btrfs: fix crash due to not cleaning up tree log block's dirty bits
Btrfs: fix extent state leak from tree log
Btrfs: fix btrfs_evict_inode to handle abnormal inodes correctly
Btrfs: fix use-after-free on root->orphan_block_rsv
Btrfs: fix unexpected -EEXIST when creating new inode
9p/trans_virtio: discard zero-length reply
mtd: nand: vf610: set correct ooblayout
ALSA: usb-audio: Fix UAC2 get_ctl request with a RANGE attribute
ALSA: hda/realtek - Add headset mode support for Dell laptop
ALSA: hda/realtek - Enable Thinkpad Dock device for ALC298 platform
ALSA: hda/realtek: PCI quirk for Fujitsu U7x7
ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204
ALSA: usb: add more device quirks for USB DSD devices
ALSA: seq: Fix racy pool initializations
mvpp2: fix multicast address filter
usb: Move USB_UHCI_BIG_ENDIAN_* out of USB_SUPPORT
x86/mm, mm/hwpoison: Don't unconditionally unmap kernel 1:1 pages
ARM: dts: exynos: fix RTC interrupt for exynos5410
ARM: pxa/tosa-bt: add MODULE_LICENSE tag
arm64: dts: msm8916: Add missing #phy-cells
ARM: dts: s5pv210: add interrupt-parent for ohci
arm: dts: mt7623: Update ethsys binding
arm: dts: mt2701: Add reset-cells
ARM: dts: Delete bogus reference to the charlcd
media: r820t: fix r820t_write_reg for KASAN
mmc: sdhci-of-esdhc: fix eMMC couldn't work after kexec
mmc: sdhci-of-esdhc: fix the mmc error after sleep on ls1046ardb
Linux 4.15.5

       The following patches from the v4.15.5 stable release had already been applied:

swiotlb: suppress warning when __GFP_NOWARN is set
ALSA: hda - Fix headset mic detection problem for two Dell machines