Merge tag 'v5.14-rc4' into media_tree

Linux 5.14-rc4

* tag 'v5.14-rc4': (948 commits)
  Linux 5.14-rc4
  pipe: make pipe writes always wake up readers
  Revert "perf map: Fix dso->nsinfo refcounting"
  mm/memcg: fix NULL pointer dereference in memcg_slab_free_hook()
  slub: fix unreclaimable slab stat for bulk free
  mm/migrate: fix NR_ISOLATED corruption on 64-bit
  mm: memcontrol: fix blocking rstat function called from atomic cgroup1 thresholding code
  ocfs2: issue zeroout to EOF blocks
  ocfs2: fix zero out valid data
  lib/test_string.c: move string selftest in the Runtime Testing menu
  gve: Update MAINTAINERS list
  arch: Kconfig: clean up obsolete use of HAVE_IDE
  can: esd_usb2: fix memory leak
  can: ems_usb: fix memory leak
  can: usb_8dev: fix memory leak
  can: mcba_usb_start(): add missing urb->transfer_dma initialization
  can: hi311x: fix a signedness bug in hi3110_cmd()
  MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver
  scsi: fas216: Fix fall-through warning for Clang
  scsi: acornscsi: Fix fall-through warning for clang
  ...

Author: mchehab

Documentation/ABI/testing/sysfs-ptp

@@ -33,6 +33,13 @@ Description:
 		frequency adjustment value (a positive integer) in
 		parts per billion.
 
+What:		/sys/class/ptp/ptpN/max_vclocks
+Date:		May 2021
+Contact:	Yangbo Lu <[email protected]>
+Description:
+		This file contains the maximum number of ptp vclocks.
+		Write integer to re-configure it.
+
 What:		/sys/class/ptp/ptpN/n_alarms
 Date:		September 2010
 Contact:	Richard Cochran <[email protected]>
@@ -61,6 +68,19 @@ Description:
 		This file contains the number of programmable pins
 		offered by the PTP hardware clock.
 
+What:		/sys/class/ptp/ptpN/n_vclocks
+Date:		May 2021
+Contact:	Yangbo Lu <[email protected]>
+Description:
+		This file contains the number of virtual PTP clocks in
+		use.  By default, the value is 0 meaning that only the
+		physical clock is in use.  Setting the value creates
+		the corresponding number of virtual clocks and causes
+		the physical clock to become free running.  Setting the
+		value back to 0 deletes the virtual clocks and
+		switches the physical clock back to normal, adjustable
+		operation.
+
 What:		/sys/class/ptp/ptpN/pins
 Date:		March 2014
 Contact:	Richard Cochran <[email protected]>

Documentation/arm64/tagged-address-abi.rst

@@ -45,14 +45,24 @@ how the user addresses are used by the kernel:
 
 1. User addresses not accessed by the kernel but used for address space
    management (e.g. ``mprotect()``, ``madvise()``). The use of valid
-   tagged pointers in this context is allowed with the exception of
-   ``brk()``, ``mmap()`` and the ``new_address`` argument to
-   ``mremap()`` as these have the potential to alias with existing
-   user addresses.
-
-   NOTE: This behaviour changed in v5.6 and so some earlier kernels may
-   incorrectly accept valid tagged pointers for the ``brk()``,
-   ``mmap()`` and ``mremap()`` system calls.
+   tagged pointers in this context is allowed with these exceptions:
+
+   - ``brk()``, ``mmap()`` and the ``new_address`` argument to
+     ``mremap()`` as these have the potential to alias with existing
+      user addresses.
+
+     NOTE: This behaviour changed in v5.6 and so some earlier kernels may
+     incorrectly accept valid tagged pointers for the ``brk()``,
+     ``mmap()`` and ``mremap()`` system calls.
+
+   - The ``range.start``, ``start`` and ``dst`` arguments to the
+     ``UFFDIO_*`` ``ioctl()``s used on a file descriptor obtained from
+     ``userfaultfd()``, as fault addresses subsequently obtained by reading
+     the file descriptor will be untagged, which may otherwise confuse
+     tag-unaware programs.
+
+     NOTE: This behaviour changed in v5.14 and so some earlier kernels may
+     incorrectly accept valid tagged pointers for this system call.
 
 2. User addresses accessed by the kernel (e.g. ``write()``). This ABI
    relaxation is disabled by default and the application thread needs to

Documentation/dev-tools/kunit/running_tips.rst

@@ -86,19 +86,7 @@ Generating code coverage reports under UML
 .. note::
 	TODO([email protected]): There are various issues with UML and
 	versions of gcc 7 and up. You're likely to run into missing ``.gcda``
-	files or compile errors. We know one `faulty GCC commit
-	<https://github.com/gcc-mirror/gcc/commit/8c9434c2f9358b8b8bad2c1990edf10a21645f9d>`_
-	but not how we'd go about getting this fixed. The compile errors still
-	need some investigation.
-
-.. note::
-	TODO([email protected]): for recent versions of Linux
-	(5.10-5.12, maybe earlier), there's a bug with gcov counters not being
-	flushed in UML. This translates to very low (<1%) reported coverage. This is
-	related to the above issue and can be worked around by replacing the
-	one call to ``uml_abort()`` (it's in ``os_dump_core()``) with a plain
-	``exit()``.
-
+	files or compile errors.
 
 This is different from the "normal" way of getting coverage information that is
 documented in Documentation/dev-tools/gcov.rst.

Documentation/devicetree/bindings/clock/brcm,iproc-clocks.yaml

@@ -50,7 +50,6 @@ properties:
 
   reg:
     minItems: 1
-    maxItems: 3
     items:
       - description: base register
       - description: power register

Documentation/devicetree/bindings/display/renesas,du.yaml

@@ -92,7 +92,6 @@ required:
   - reg
   - clocks
   - interrupts
-  - resets
   - ports
 
 allOf:

Documentation/devicetree/bindings/hwmon/adt7475.yaml

@@ -39,17 +39,7 @@ properties:
   reg:
     maxItems: 1
 
-patternProperties:
-  "^adi,bypass-attenuator-in[0-4]$":
-    description: |
-      Configures bypassing the individual voltage input attenuator. If
-      set to 1 the attenuator is bypassed if set to 0 the attenuator is
-      not bypassed. If the property is absent then the attenuator
-      retains it's configuration from the bios/bootloader.
-    $ref: /schemas/types.yaml#/definitions/uint32
-    enum: [0, 1]
-
-  "^adi,pwm-active-state$":
+  adi,pwm-active-state:
     description: |
       Integer array, represents the active state of the pwm outputs If set to 0
       the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm
@@ -61,6 +51,16 @@ patternProperties:
       enum: [0, 1]
       default: 1
 
+patternProperties:
+  "^adi,bypass-attenuator-in[0-4]$":
+    description: |
+      Configures bypassing the individual voltage input attenuator. If
+      set to 1 the attenuator is bypassed if set to 0 the attenuator is
+      not bypassed. If the property is absent then the attenuator
+      retains it's configuration from the bios/bootloader.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/iommu/arm,smmu.yaml

@@ -52,16 +52,14 @@ properties:
         items:
           - const: marvell,ap806-smmu-500
           - const: arm,mmu-500
-      - description: NVIDIA SoCs that program two ARM MMU-500s identically
-        items:
       - description: NVIDIA SoCs that require memory controller interaction
           and may program multiple ARM MMU-500s identically with the memory
           controller interleaving translations between multiple instances
           for improved performance.
         items:
           - enum:
-              - const: nvidia,tegra194-smmu
-              - const: nvidia,tegra186-smmu
+              - nvidia,tegra194-smmu
+              - nvidia,tegra186-smmu
           - const: nvidia,smmu-500
       - items:
           - const: arm,mmu-500

Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml

@@ -28,14 +28,12 @@ properties:
       - description: configuration registers for MMU instance 0
       - description: configuration registers for MMU instance 1
     minItems: 1
-    maxItems: 2
 
   interrupts:
     items:
       - description: interruption for MMU instance 0
       - description: interruption for MMU instance 1
     minItems: 1
-    maxItems: 2
 
   clocks:
     items:

Documentation/devicetree/bindings/memory-controllers/arm,pl353-smc.yaml

@@ -57,7 +57,6 @@ properties:
 
   ranges:
     minItems: 1
-    maxItems: 3
     description: |
       Memory bus areas for interacting with the devices. Reflects
       the memory layout with four integer values following:

Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml

@@ -84,15 +84,13 @@ properties:
 
   interrupts:
     minItems: 1
-    maxItems: 3
     items:
       - description: NAND CTLRDY interrupt
       - description: FLASH_DMA_DONE if flash DMA is available
       - description: FLASH_EDU_DONE if EDU is available
 
   interrupt-names:
     minItems: 1
-    maxItems: 3
     items:
       - const: nand_ctlrdy
       - const: flash_dma_done
@@ -148,8 +146,6 @@ allOf:
     then:
       properties:
         reg-names:
-          minItems: 2
-          maxItems: 2
           items:
             - const: nand
             - const: nand-int-base
@@ -161,8 +157,6 @@ allOf:
     then:
       properties:
         reg-names:
-          minItems: 3
-          maxItems: 3
           items:
             - const: nand
             - const: nand-int-base
@@ -175,8 +169,6 @@ allOf:
     then:
       properties:
         reg-names:
-          minItems: 3
-          maxItems: 3
           items:
             - const: nand
             - const: iproc-idm