Merge misc fixes from Andrew Morton:
 "10 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  x86/mm: split vmalloc_sync_all()
  mm, slub: prevent kmalloc_node crashes and memory leaks
  mm/mmu_notifier: silence PROVE_RCU_LIST warnings
  epoll: fix possible lost wakeup on epoll_ctl() path
  mm: do not allow MADV_PAGEOUT for CoW pages
  mm, memcg: throttle allocators based on ancestral memory.high
  mm, memcg: fix corruption on 64-bit divisor in memory.high throttling
  page-flags: fix a crash at SetPageError(THP_SWAP)
  mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case
  memcg: fix NULL pointer dereference in __mem_cgroup_usage_unregister_event

Commit 3f8fd02b1bf1 ("mm/vmalloc: Sync unmappings in
__purge_vmap_area_lazy()") introduced a call to vmalloc_sync_all() in
the vunmap() code-path.  While this change was necessary to maintain
correctness on x86-32-pae kernels, it also adds additional cycles for
architectures that don't need it.

Specifically on x86-64 with CONFIG_VMAP_STACK=y some people reported
severe performance regressions in micro-benchmarks because it now also
calls the x86-64 implementation of vmalloc_sync_all() on vunmap().  But
the vmalloc_sync_all() implementation on x86-64 is only needed for newly
created mappings.

To avoid the unnecessary work on x86-64 and to gain the performance
back, split up vmalloc_sync_all() into two functions:

	* vmalloc_sync_mappings(), and
	* vmalloc_sync_unmappings()

Most call-sites to vmalloc_sync_all() only care about new mappings being
synchronized.  The only exception is the new call-site added in the
above mentioned commit.

Shile Zhang directed us to a report of an 80% regression in reaim
throughput.

Fixes: 3f8fd02b1bf1 ("mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Shile Zhang <shile.zhang@linux.alibaba.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>	[GHES]
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20191009124418.8286-1-joro@8bytes.org
Link: https://lists.01.org/hyperkitty/list/lkp@lists.01.org/thread/4D3JPPHBNOSPFK2KEPC6KGKS6J25AIDB/
Link: http://lkml.kernel.org/r/20191113095530.228959-1-shile.zhang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull block fixes from Jens Axboe:
 "Just two NVMe fabrics fixes that should go into 5.6"

* tag 'block-5.6-20200320' of git://git.kernel.dk/linux-block:
  nvmet-tcp: set MSG_MORE only if we actually have more to send
  nvme-rdma: Avoid double freeing of async event data

Pull NVMe fixes from Keith:

"Two late nvme fabrics fixes for 5.6: a double free with the rdma
 transport, and a regression fix for tcp; please pull."

* 'nvme-5.6-rc6' of git://git.infradead.org/nvme:
  nvmet-tcp: set MSG_MORE only if we actually have more to send
  nvme-rdma: Avoid double freeing of async event data

When we send PDU data, we want to optimize the tcp stack
operation if we have more data to send. So when we set MSG_MORE
when:
- We have more fragments coming in the batch, or
- We have a more data to send in this PDU
- We don't have a data digest trailer
- We optimize with the SUCCESS flag and omit the NVMe completion
  (used if sq_head pointer update is disabled)

This addresses a regression in QD=1 with SUCCESS flag optimization
as we unconditionally set MSG_MORE when we didn't actually have
more data to send.

Fixes: 70583295388a ("nvmet-tcp: implement C2HData SUCCESS optimization")
Reported-by: Mark Wunderlich <mark.wunderlich@intel.com>
Tested-by: Mark Wunderlich <mark.wunderlich@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Pull char/misc driver fixes from Greg KH:
 "Here are some small different driver fixes for 5.6-rc7:

   - binderfs fix, yet again

   - slimbus new device id added

   - hwtracing bugfixes for reported issues and a new device id

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  intel_th: pci: Add Elkhart Lake CPU support
  intel_th: Fix user-visible error codes
  intel_th: msu: Fix the unexpected state warning
  stm class: sys-t: Fix the use of time_after()
  slimbus: ngd: add v2.1.0 compatible
  binderfs: use refcount for binder control devices too

Pull staging/IIO fixes from Greg KH:
 "Here are a number of small staging and IIO driver fixes for 5.6-rc7

  Nothing major here, just resolutions for some reported problems:
   - iio bugfixes for a number of different drivers
   - greybus loopback_test fixes
   - wfx driver fixes

  All of these have been in linux-next with no reported issues"

* tag 'staging-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: rtl8188eu: Add device id for MERCUSYS MW150US v2
  staging: greybus: loopback_test: fix potential path truncations
  staging: greybus: loopback_test: fix potential path truncation
  staging: greybus: loopback_test: fix poll-mask build breakage
  staging: wfx: fix RCU usage between hif_join() and ieee80211_bss_get_ie()
  staging: wfx: fix RCU usage in wfx_join_finalize()
  staging: wfx: make warning about pending frame less scary
  staging: wfx: fix lines ending with a comma instead of a semicolon
  staging: wfx: fix warning about freeing in-use mutex during device unregister
  staging/speakup: fix get_word non-space look-ahead
  iio: ping: set pa_laser_ping_cfg in of_ping_match
  iio: chemical: sps30: fix missing triggered buffer dependency
  iio: st_sensors: remap SMO8840 to LIS2DH12
  iio: light: vcnl4000: update sampling periods for vcnl4040
  iio: light: vcnl4000: update sampling periods for vcnl4200
  iio: accel: adxl372: Set iio_chan BE
  iio: magnetometer: ak8974: Fix negative raw values in sysfs
  iio: trigger: stm32-timer: disable master mode when stopping
  iio: adc: stm32-dfsdm: fix sleep in atomic context
  iio: adc: at91-sama5d2_adc: fix differential channels in triggered mode

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 5.6-rc7. And there's a thunderbolt
  driver fix thrown in for good measure as well.

  These fixes are:
   - new device ids for usb-serial drivers
   - thunderbolt error code fix
   - xhci driver fixes
   - typec fixes
   - cdc-acm driver fixes
   - chipidea driver fix
   - more USB quirks added for devices that need them.

  All of these have been in linux-next with no reported issues"

* tag 'usb-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: cdc-acm: fix rounding error in TIOCSSERIAL
  USB: cdc-acm: fix close_delay and closing_wait units in TIOCSSERIAL
  usb: quirks: add NO_LPM quirk for RTL8153 based ethernet adapters
  usb: chipidea: udc: fix sleeping function called from invalid context
  USB: serial: pl2303: add device-id for HP LD381
  USB: serial: option: add ME910G1 ECM composition 0x110b
  usb: host: xhci-plat: add a shutdown
  usb: typec: ucsi: displayport: Fix a potential race during registration
  usb: typec: ucsi: displayport: Fix NULL pointer dereference
  USB: Disable LPM on WD19's Realtek Hub
  usb: xhci: apply XHCI_SUSPEND_DELAY to AMD XHCI controller 1022:145c
  xhci: Do not open code __print_symbolic() in xhci trace events
  thunderbolt: Fix error code in tb_port_is_width_supported()

Pull tty fixes from Greg KH:
 "Here are three small tty_io bugfixes for reported issues that Eric has
  resolved for 5.6-rc7

  All of these have been in linux-next with no reported issues"

* tag 'tty-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: fix compat TIOCGSERIAL checking wrong function ptr
  tty: fix compat TIOCGSERIAL leaking uninitialized memory
  tty: drop outdated comments about release_tty() locking

Pull drm fixes from Dave Airlie:
 "Hope you are well hiding out above the garage. A few amdgpu changes
  but nothing too major. I've had a wisdom tooth out this week so
  haven't been to on top of things, but all seems good.

  core:
   - fix lease warning

  i915:
   - Track active elements during dequeue
   - Fix failure to handle all MCR ranges
   - Revert unnecessary workaround

  amdgpu:
   - Pageflip fix
   - VCN clockgating fixes
   - GPR debugfs fix for umr
   - GPU reset fix
   - eDP fix for MBP
   - DCN2.x fix

  dw-hdmi:
   - fix AVI frame colorimetry

  komeda:
   - fix compiler warning

  bochs:
   - downgrade a binding failure to a warning"

* tag 'drm-fixes-2020-03-20' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: Fix pageflip event race condition for DCN.
  drm/amdgpu: fix typo for vcn2.5/jpeg2.5 idle check
  drm/amdgpu: fix typo for vcn2/jpeg2 idle check
  drm/amdgpu: fix typo for vcn1 idle check
  drm/lease: fix WARNING in idr_destroy
  drm/i915: Handle all MCR ranges
  Revert "drm/i915/tgl: Add extra hdc flush workaround"
  drm/i915/execlists: Track active elements during dequeue
  drm/bochs: downgrade pci_request_region failure from error to warning
  drm/amd/display: Add link_rate quirk for Apple 15" MBP 2017
  drm/amdgpu: add fbdev suspend/resume on gpu reset
  drm/amd/amdgpu: Fix GPR read from debugfs (v2)
  drm/amd/display: fix typos for dcn20_funcs and dcn21_funcs struct
  drm/komeda: mark PM functions as __maybe_unused
  drm/bridge: dw-hdmi: fix AVI frame colorimetry