Merge yet more updates from Andrew Morton:
 "A few final bits:

   - large changes to vmalloc, yielding large performance benefits

   - tweak the console-flush-on-panic code

   - a few fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  panic: add an option to replay all the printk message in buffer
  initramfs: don't free a non-existent initrd
  fs/writeback.c: use rcu_barrier() to wait for inflight wb switches going into workqueue when umount
  mm/compaction.c: correct zone boundary handling when isolating pages from a pageblock
  mm/vmap: add DEBUG_AUGMENT_LOWEST_MATCH_CHECK macro
  mm/vmap: add DEBUG_AUGMENT_PROPAGATE_CHECK macro
  mm/vmalloc.c: keep track of free blocks for vmap allocation

Pull more Kbuild updates from Masahiro Yamada:

 - remove unneeded use of cc-option, cc-disable-warning, cc-ldoption

 - exclude tracked files from .gitignore

 - re-enable -Wint-in-bool-context warning

 - refactor samples/Makefile

 - stop building immediately if syncconfig fails

 - do not sprinkle error messages when $(CC) does not exist

 - move arch/alpha/defconfig to the configs subdirectory

 - remove crappy header search path manipulation

 - add comment lines to .config to clarify the end of menu blocks

 - check uniqueness of module names (adding new warnings intentionally)

* tag 'kbuild-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (24 commits)
  kconfig: use 'else ifneq' for Makefile to improve readability
  kbuild: check uniqueness of module names
  kconfig: Terminate menu blocks with a comment in the generated config
  kbuild: add LICENSES to KBUILD_ALLDIRS
  kbuild: remove 'addtree' and 'flags' magic for header search paths
  treewide: prefix header search paths with $(srctree)/
  media: prefix header search paths with $(srctree)/
  media: remove unneeded header search paths
  alpha: move arch/alpha/defconfig to arch/alpha/configs/defconfig
  kbuild: terminate Kconfig when $(CC) or $(LD) is missing
  kbuild: turn auto.conf.cmd into a mandatory include file
  .gitignore: exclude .get_maintainer.ignore and .gitattributes
  kbuild: add all Clang-specific flags unconditionally
  kbuild: Don't try to add '-fcatch-undefined-behavior' flag
  kbuild: add some extra warning flags unconditionally
  kbuild: add -Wvla flag unconditionally
  arch: remove dangling asm-generic wrappers
  samples: guard sub-directories with CONFIG options
  kbuild: re-enable int-in-bool-context warning
  MAINTAINERS: kbuild: Add pattern for scripts/*vmlinux*
  ...

Pull clocksource updates from Ingo Molnar:
 "Misc clocksource/clockevent driver updates that came in a bit late but
  are ready for v5.2"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  misc: atmel_tclib: Do not probe already used TCBs
  clocksource/drivers/timer-atmel-tcb: Convert tc_clksrc_suspend|resume() to static
  clocksource/drivers/tcb_clksrc: Rename the file for consistency
  clocksource/drivers/timer-atmel-pit: Rework Kconfig option
  clocksource/drivers/tcb_clksrc: Move Kconfig option
  ARM: at91: Implement clocksource selection
  clocksource/drivers/tcb_clksrc: Use tcb as sched_clock
  clocksource/drivers/tcb_clksrc: Stop depending on atmel_tclib
  ARM: at91: move SoC specific definitions to SoC folder
  clocksource/drivers/timer-milbeaut: Cleanup common register accesses
  clocksource/drivers/timer-milbeaut: Add shutdown function
  clocksource/drivers/timer-milbeaut: Fix to enable one-shot timer
  clocksource/drivers/tegra: Rework for compensation of suspend time
  clocksource/drivers/sp804: Add COMPILE_TEST to CONFIG_ARM_TIMER_SP804
  clocksource/drivers/sun4i: Add a compatible for suniv
  dt-bindings: timer: Add Allwinner suniv timer

Pull IRQ chip updates from Ingo Molnar:
 "A late irqchips update:

   - New TI INTR/INTA set of drivers

   - Rewrite of the stm32mp1-exti driver as a platform driver

   - Update the IOMMU MSI mapping API to be RT friendly

   - A number of cleanups and other low impact fixes"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
  iommu/dma-iommu: Remove iommu_dma_map_msi_msg()
  irqchip/gic-v3-mbi: Don't map the MSI page in mbi_compose_m{b, s}i_msg()
  irqchip/ls-scfg-msi: Don't map the MSI page in ls_scfg_msi_compose_msg()
  irqchip/gic-v3-its: Don't map the MSI page in its_irq_compose_msi_msg()
  irqchip/gicv2m: Don't map the MSI page in gicv2m_compose_msi_msg()
  iommu/dma-iommu: Split iommu_dma_map_msi_msg() in two parts
  genirq/msi: Add a new field in msi_desc to store an IOMMU cookie
  arm64: arch_k3: Enable interrupt controller drivers
  irqchip/ti-sci-inta: Add msi domain support
  soc: ti: Add MSI domain bus support for Interrupt Aggregator
  irqchip/ti-sci-inta: Add support for Interrupt Aggregator driver
  dt-bindings: irqchip: Introduce TISCI Interrupt Aggregator bindings
  irqchip/ti-sci-intr: Add support for Interrupt Router driver
  dt-bindings: irqchip: Introduce TISCI Interrupt router bindings
  gpio: thunderx: Use the default parent apis for {request,release}_resources
  genirq: Introduce irq_chip_{request,release}_resource_parent() apis
  firmware: ti_sci: Add helper apis to manage resources
  firmware: ti_sci: Add RM mapping table for am654
  firmware: ti_sci: Add support for IRQ management
  firmware: ti_sci: Add support for RM core ops
  ...

Pull core fixes from Ingo Molnar:
 "This fixes a particularly thorny munmap() bug with MPX, plus fixes a
  host build environment assumption in objtool"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Allow AR to be overridden with HOSTAR
  x86/mpx, mm/core: Fix recursive munmap() corruption

Pull ARM SoC late updates from Olof Johansson:
 "This is some material that we picked up into our tree late. Most of it
  are smaller fixes and additions, some defconfig updates due to recent
  development, etc.

  Code-wise the largest portion is a series of PM updates for the at91
  platform, and those have been in linux-next a while through the at91
  tree before we picked them up"

* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (29 commits)
  arm64: dts: sprd: Add clock properties for serial devices
  Opt out of scripts/get_maintainer.pl
  ARM: ixp4xx: Remove duplicated include from common.c
  soc: ixp4xx: qmgr: Fix an NULL vs IS_ERR() check in probe
  arm64: tegra: Disable XUSB support on Jetson TX2
  arm64: tegra: Enable SMMU translation for PCI on Tegra186
  arm64: tegra: Fix insecure SMMU users for Tegra186
  arm64: tegra: Select ARM_GIC_PM
  amba: tegra-ahb: Mark PM functions as __maybe_unused
  ARM: dts: logicpd-som-lv: Fix MMC1 card detect
  ARM: mvebu: drop return from void function
  ARM: mvebu: prefix coprocessor operand with p
  ARM: mvebu: drop unnecessary label
  ARM: mvebu: fix a leaked reference by adding missing of_node_put
  ARM: socfpga_defconfig: enable LTC2497
  ARM: mvebu: kirkwood: remove error message when retrieving mac address
  ARM: at91: sama5: make ov2640 as a module
  ARM: OMAP1: ams-delta: fix early boot crash when LED support is disabled
  ARM: at91: remove HAVE_FB_ATMEL for sama5 SoC as they use DRM
  soc/fsl/qe: Fix an error code in qe_pin_request()
  ...

Pull powerpc fixes from Michael Ellerman:
 "One fix going back to stable, for a bug on 32-bit introduced when we
  added support for THREAD_INFO_IN_TASK.

  A fix for a typo in a recent rework of our hugetlb code that leads to
  crashes on 64-bit when using hugetlbfs with a 4K PAGE_SIZE.

  Two fixes for our recent rework of the address layout on 64-bit hash
  CPUs, both only triggered when userspace tries to access addresses
  outside the user or kernel address ranges.

  Finally a fix for a recently introduced double free in an error path
  in our cacheinfo code.

  Thanks to: Aneesh Kumar K.V, Christophe Leroy, Sachin Sant, Tobin C.
  Harding"

* tag 'powerpc-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/cacheinfo: Remove double free
  powerpc/mm/hash: Fix get_region_id() for invalid addresses
  powerpc/mm: Drop VM_BUG_ON in get_region_id()
  powerpc/mm: Fix crashes with hugepages & 4K pages
  powerpc/32s: fix flush_hash_pages() on SMP

Pull a few more MIPS updates from Paul Burton:
 "Some SGI IP27 specific PCI rework and a batch of fixes:

   - A build fix for BMIPS5000 configurations with
     CONFIG_HW_PERF_EVENTS=y, which also neatly removes some #ifdefery.

   - A fix to report supported ISAs correctly on older Ingenic SoCs
     which incorrectly indicate MIPSr2 support in their cop0 Config
     register.

   - Some PCI modernization for SGI IP27 systems as part of ongoing work
     to support some other SGI systems.

   - A fix allowing use of appended DTB files with generic kernels.

   - DMA mask fixes for SGI IP22 & Alchemy systems"

* tag 'mips_5.2_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Alchemy: add DMA masks for on-chip ethernet
  MIPS: SGI-IP22: provide missing dma_mask/coherent_dma_mask
  generic: fix appended dtb support
  MIPS: SGI-IP27: abstract chipset irq from bridge
  MIPS: SGI-IP27: use generic PCI driver
  MIPS: Fix Ingenic SoCs sometimes reporting wrong ISA
  MIPS: perf: Fix build with CONFIG_CPU_BMIPS5000 enabled

Pull RISC-V updates from Palmer Dabbelt:
 "This contains an assortment of RISC-V related patches that I'd like to
  target for the 5.2 merge window. Most of the patches are cleanups, but
  there are a handful of user-visible changes:

   - The nosmp and nr_cpus command-line arguments are now supported,
     which work like normal.

   - The SBI console no longer installs itself as a preferred console,
     we rely on standard mechanisms (/chosen, command-line, hueristics)
     instead.

   - sfence_remove_sfence_vma{,_asid} now pass their arguments along to
     the SBI call.

   - Modules now support BUG().

   - A missing sfence.vma during boot has been added. This bug only
     manifests during boot.

   - The arch/riscv support for SiFive's L2 cache controller has been
     merged, which should un-block the EDAC framework work.

  I've only tested this on QEMU again, as I didn't have time to get
  things running on the Unleashed. The latest master from this morning
  merges in cleanly and passes the tests as well"

* tag 'riscv-for-linus-5.2-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux: (31 commits)
  riscv: fix locking violation in page fault handler
  RISC-V: sifive_l2_cache: Add L2 cache controller driver for SiFive SoCs
  RISC-V: Add DT documentation for SiFive L2 Cache Controller
  RISC-V: Avoid using invalid intermediate translations
  riscv: Support BUG() in kernel module
  riscv: Add the support for c.ebreak check in is_valid_bugaddr()
  riscv: support trap-based WARN()
  riscv: fix sbi_remote_sfence_vma{,_asid}.
  riscv: move switch_mm to its own file
  riscv: move flush_icache_{all,mm} to cacheflush.c
  tty: Don't force RISCV SBI console as preferred console
  RISC-V: Access CSRs using CSR numbers
  RISC-V: Add interrupt related SCAUSE defines in asm/csr.h
  RISC-V: Use tabs to align macro values in asm/csr.h
  RISC-V: Fix minor checkpatch issues.
  RISC-V: Support nr_cpus command line option.
  RISC-V: Implement nosmp commandline option.
  RISC-V: Add RISC-V specific arch_match_cpu_phys_id
  riscv: vdso: drop unnecessary cc-ldoption
  riscv: call pm_power_off from machine_halt / machine_power_off
  ...

Currently on panic, kernel will lower the loglevel and print out pending
printk msg only with console_flush_on_panic().

Add an option for users to configure the "panic_print" to replay all
dmesg in buffer, some of which they may have never seen due to the
loglevel setting, which will help panic debugging .

[feng.tang@intel.com: keep the original console_flush_on_panic() inside panic()]
  Link: http://lkml.kernel.org/r/1556199137-14163-1-git-send-email-feng.tang@intel.com
[feng.tang@intel.com: use logbuf lock to protect the console log index]
  Link: http://lkml.kernel.org/r/1556269868-22654-1-git-send-email-feng.tang@intel.com
Link: http://lkml.kernel.org/r/1556095872-36838-1-git-send-email-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>