Merge branch 'sg_nents' into rdma.git for-next

From Maor Gottlieb
====================

Fix the use of nents and orig_nents in the sg table append helpers. The
nents should be used by the DMA layer to store the number of DMA mapped
sges, the orig_nents is the number of CPU sges.

Since the sg append logic doesn't always create a SGL with exactly
orig_nents entries store a total_nents as well to allow the table to be
properly free'd and reorganize the freeing logic to share across all the
use cases.

====================

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

* 'sg_nents':
  RDMA: Use the sg_table directly and remove the opencoded version from umem
  lib/scatterlist: Fix wrong update of orig_nents
  lib/scatterlist: Provide a dedicated function to support table append

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 <yangbo.lu@nxp.com>
+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 <richardcochran@gmail.com>
@@ -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 <yangbo.lu@nxp.com>
+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 <richardcochran@gmail.com>

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/bpf/libbpf/libbpf_naming_convention.rst

@@ -108,7 +108,7 @@ This bump in ABI version is at most once per kernel development cycle.
 
 For example, if current state of ``libbpf.map`` is:
 
-.. code-block:: c
+.. code-block:: none
 
         LIBBPF_0.0.1 {
         	global:
@@ -121,7 +121,7 @@ For example, if current state of ``libbpf.map`` is:
 , and a new symbol ``bpf_func_c`` is being introduced, then
 ``libbpf.map`` should be changed like this:
 
-.. code-block:: c
+.. code-block:: none
 
         LIBBPF_0.0.1 {
         	global:

Documentation/dev-tools/kunit/running_tips.rst

@@ -86,19 +86,7 @@ Generating code coverage reports under UML
 .. note::
 	TODO(brendanhiggins@google.com): 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(brendanhiggins@google.com): 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/iio/st,st-sensors.yaml

@@ -152,47 +152,6 @@ allOf:
           maxItems: 1
         st,drdy-int-pin: false
 
-  - if:
-      properties:
-        compatible:
-          enum:
-            # Two intertial interrupts i.e. accelerometer/gyro interrupts
-            - st,h3lis331dl-accel
-            - st,l3g4200d-gyro
-            - st,l3g4is-gyro
-            - st,l3gd20-gyro
-            - st,l3gd20h-gyro
-            - st,lis2de12
-            - st,lis2dw12
-            - st,lis2hh12
-            - st,lis2dh12-accel
-            - st,lis331dl-accel
-            - st,lis331dlh-accel
-            - st,lis3de
-            - st,lis3dh-accel
-            - st,lis3dhh
-            - st,lis3mdl-magn
-            - st,lng2dm-accel
-            - st,lps331ap-press
-            - st,lsm303agr-accel
-            - st,lsm303dlh-accel
-            - st,lsm303dlhc-accel
-            - st,lsm303dlm-accel
-            - st,lsm330-accel
-            - st,lsm330-gyro
-            - st,lsm330d-accel
-            - st,lsm330d-gyro
-            - st,lsm330dl-accel
-            - st,lsm330dl-gyro
-            - st,lsm330dlc-accel
-            - st,lsm330dlc-gyro
-            - st,lsm9ds0-gyro
-            - st,lsm9ds1-magn
-    then:
-      properties:
-        interrupts:
-          maxItems: 2
-
 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

Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml

@@ -67,8 +67,8 @@ properties:
           reg:
             oneOf:
               - enum:
-                - 0
-                - 1
+                  - 0
+                  - 1
 
         required:
           - compatible

Documentation/devicetree/bindings/net/gpmc-eth.txt

@@ -13,7 +13,7 @@ Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
 
 For the properties relevant to the ethernet controller connected to the GPMC
 refer to the binding documentation of the device. For example, the documentation
-for the SMSC 911x is Documentation/devicetree/bindings/net/smsc911x.txt
+for the SMSC 911x is Documentation/devicetree/bindings/net/smsc,lan9115.yaml
 
 Child nodes need to specify the GPMC bus address width using the "bank-width"
 property but is possible that an ethernet controller also has a property to