Merge tag 'rolling-lts/wsl/5.10.93.2' into linux-msft-wsl-5.10.y

Signed-off-by: Tyler Hicks <[email protected]>

Author: tyhicks

Documentation/admin-guide/kernel-parameters.txt

@@ -1617,6 +1617,8 @@
 			architectures force reset to be always executed
 	i8042.unlock	[HW] Unlock (ignore) the keylock
 	i8042.kbdreset	[HW] Reset device connected to KBD port
+	i8042.probe_defer
+			[HW] Allow deferred probing upon i8042 probe errors
 
 	i810=		[HW,DRM]
 
@@ -2294,8 +2296,12 @@
 			Default is 1 (enabled)
 
 	kvm-intel.emulate_invalid_guest_state=
-			[KVM,Intel] Enable emulation of invalid guest states
-			Default is 0 (disabled)
+			[KVM,Intel] Disable emulation of invalid guest state.
+			Ignored if kvm-intel.enable_unrestricted_guest=1, as
+			guest state is never invalid for unrestricted guests.
+			This param doesn't apply to nested guests (L2), as KVM
+			never emulates invalid L2 guest state.
+			Default is 1 (enabled)
 
 	kvm-intel.flexpriority=
 			[KVM,Intel] Disable FlexPriority feature (TPR shadow).

Documentation/admin-guide/sysctl/kernel.rst

@@ -1457,11 +1457,22 @@ unprivileged_bpf_disabled
 =========================
 
 Writing 1 to this entry will disable unprivileged calls to ``bpf()``;
-once disabled, calling ``bpf()`` without ``CAP_SYS_ADMIN`` will return
-``-EPERM``.
+once disabled, calling ``bpf()`` without ``CAP_SYS_ADMIN`` or ``CAP_BPF``
+will return ``-EPERM``. Once set to 1, this can't be cleared from the
+running kernel anymore.
 
-Once set, this can't be cleared.
+Writing 2 to this entry will also disable unprivileged calls to ``bpf()``,
+however, an admin can still change this setting later on, if needed, by
+writing 0 or 1 to this entry.
 
+If ``BPF_UNPRIV_DEFAULT_OFF`` is enabled in the kernel config, then this
+entry will default to 2 instead of 0.
+
+= =============================================================
+0 Unprivileged calls to ``bpf()`` are enabled
+1 Unprivileged calls to ``bpf()`` are disabled without recovery
+2 Unprivileged calls to ``bpf()`` are disabled
+= =============================================================
 
 watchdog
 ========

Documentation/devicetree/bindings/net/ethernet-phy.yaml

@@ -91,6 +91,14 @@ properties:
       compensate for the board being designed with the lanes
       swapped.
 
+  enet-phy-lane-no-swap:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      If set, indicates that PHY will disable swap of the
+      TX/RX lanes. This property allows the PHY to work correcly after
+      e.g. wrong bootstrap configuration caused by issues in PCB
+      layout design.
+
   eee-broken-100tx:
     $ref: /schemas/types.yaml#definitions/flag
     description:

Documentation/hwmon/lm90.rst

@@ -265,6 +265,16 @@ Supported chips:
 
 	       https://www.ti.com/litv/pdf/sbos686
 
+  * Texas Instruments TMP461
+
+    Prefix: 'tmp461'
+
+    Addresses scanned: I2C 0x48 through 0x4F
+
+    Datasheet: Publicly available at TI website
+
+	       https://www.ti.com/lit/gpn/tmp461
+
 Author: Jean Delvare <[email protected]>
 
 

Documentation/kbuild/gcc-plugins.rst

@@ -11,16 +11,13 @@ compiler [1]_. They are useful for runtime instrumentation and static analysis.
 We can analyse, change and add further code during compilation via
 callbacks [2]_, GIMPLE [3]_, IPA [4]_ and RTL passes [5]_.
 
-The GCC plugin infrastructure of the kernel supports all gcc versions from
-4.5 to 6.0, building out-of-tree modules, cross-compilation and building in a
-separate directory.
-Plugin source files have to be compilable by both a C and a C++ compiler as well
-because gcc versions 4.5 and 4.6 are compiled by a C compiler,
-gcc-4.7 can be compiled by a C or a C++ compiler,
-and versions 4.8+ can only be compiled by a C++ compiler.
+The GCC plugin infrastructure of the kernel supports building out-of-tree
+modules, cross-compilation and building in a separate directory.
+Plugin source files have to be compilable by a C++ compiler.
 
-Currently the GCC plugin infrastructure supports only the x86, arm, arm64 and
-powerpc architectures.
+Currently the GCC plugin infrastructure supports only some architectures.
+Grep "select HAVE_GCC_PLUGINS" to find out which architectures support
+GCC plugins.
 
 This infrastructure was ported from grsecurity [6]_ and PaX [7]_.
 
@@ -47,42 +44,39 @@ Files
 	This is a compatibility header for GCC plugins.
 	It should be always included instead of individual gcc headers.
 
-**$(src)/scripts/gcc-plugin.sh**
-
-	This script checks the availability of the included headers in
-	gcc-common.h and chooses the proper host compiler to build the plugins
-	(gcc-4.7 can be built by either gcc or g++).
-
 **$(src)/scripts/gcc-plugins/gcc-generate-gimple-pass.h,
 $(src)/scripts/gcc-plugins/gcc-generate-ipa-pass.h,
 $(src)/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h,
 $(src)/scripts/gcc-plugins/gcc-generate-rtl-pass.h**
 
 	These headers automatically generate the registration structures for
-	GIMPLE, SIMPLE_IPA, IPA and RTL passes. They support all gcc versions
-	from 4.5 to 6.0.
+	GIMPLE, SIMPLE_IPA, IPA and RTL passes.
 	They should be preferred to creating the structures by hand.
 
 
 Usage
 =====
 
 You must install the gcc plugin headers for your gcc version,
-e.g., on Ubuntu for gcc-4.9::
+e.g., on Ubuntu for gcc-10::
 
-	apt-get install gcc-4.9-plugin-dev
+	apt-get install gcc-10-plugin-dev
 
 Or on Fedora::
 
 	dnf install gcc-plugin-devel
 
-Enable a GCC plugin based feature in the kernel config::
+Enable the GCC plugin infrastructure and some plugin(s) you want to use
+in the kernel config::
 
-	CONFIG_GCC_PLUGIN_CYC_COMPLEXITY = y
+	CONFIG_GCC_PLUGINS=y
+	CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=y
+	CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
+	...
 
-To compile only the plugin(s)::
+To compile the minimum tool set including the plugin(s)::
 
-	make gcc-plugins
+	make scripts
 
 or just run the kernel make and compile the whole kernel with
 the cyclomatic complexity GCC plugin.
@@ -91,7 +85,8 @@ the cyclomatic complexity GCC plugin.
 4. How to add a new GCC plugin
 ==============================
 
-The GCC plugins are in $(src)/scripts/gcc-plugins/. You can use a file or a directory
-here. It must be added to $(src)/scripts/gcc-plugins/Makefile,
-$(src)/scripts/Makefile.gcc-plugins and $(src)/arch/Kconfig.
+The GCC plugins are in scripts/gcc-plugins/. You need to put plugin source files
+right under scripts/gcc-plugins/. Creating subdirectories is not supported.
+It must be added to scripts/gcc-plugins/Makefile, scripts/Makefile.gcc-plugins
+and a relevant Kconfig file.
 See the cyc_complexity_plugin.c (CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) GCC plugin.

Documentation/locking/locktypes.rst

@@ -439,11 +439,9 @@ preemption. The following substitution works on both kernels::
   spin_lock(&p->lock);
   p->count += this_cpu_read(var2);
 
-On a non-PREEMPT_RT kernel migrate_disable() maps to preempt_disable()
-which makes the above code fully equivalent. On a PREEMPT_RT kernel
 migrate_disable() ensures that the task is pinned on the current CPU which
 in turn guarantees that the per-CPU access to var1 and var2 are staying on
-the same CPU.
+the same CPU while the task remains preemptible.
 
 The migrate_disable() substitution is not valid for the following
 scenario::
@@ -456,9 +454,8 @@ scenario::
     p = this_cpu_ptr(&var1);
     p->val = func2();
 
-While correct on a non-PREEMPT_RT kernel, this breaks on PREEMPT_RT because
-here migrate_disable() does not protect against reentrancy from a
-preempting task. A correct substitution for this case is::
+This breaks because migrate_disable() does not protect against reentrancy from
+a preempting task. A correct substitution for this case is::
 
   func()
   {

Documentation/networking/bonding.rst

@@ -196,11 +196,12 @@ ad_actor_sys_prio
 ad_actor_system
 
 	In an AD system, this specifies the mac-address for the actor in
-	protocol packet exchanges (LACPDUs). The value cannot be NULL or
-	multicast. It is preferred to have the local-admin bit set for this
-	mac but driver does not enforce it. If the value is not given then
-	system defaults to using the masters' mac address as actors' system
-	address.
+	protocol packet exchanges (LACPDUs). The value cannot be a multicast
+	address. If the all-zeroes MAC is specified, bonding will internally
+	use the MAC of the bond itself. It is preferred to have the
+	local-admin bit set for this mac but driver does not enforce it. If
+	the value is not given then system defaults to using the masters'
+	mac address as actors' system address.
 
 	This parameter has effect only in 802.3ad mode and is available through
 	SysFs interface.

Documentation/networking/device_drivers/ethernet/intel/ixgbe.rst

@@ -440,6 +440,22 @@ NOTE: For 82599-based network connections, if you are enabling jumbo frames in
 a virtual function (VF), jumbo frames must first be enabled in the physical
 function (PF). The VF MTU setting cannot be larger than the PF MTU.
 
+NBASE-T Support
+---------------
+The ixgbe driver supports NBASE-T on some devices. However, the advertisement
+of NBASE-T speeds is suppressed by default, to accommodate broken network
+switches which cannot cope with advertised NBASE-T speeds. Use the ethtool
+command to enable advertising NBASE-T speeds on devices which support it::
+
+  ethtool -s eth? advertise 0x1800000001028
+
+On Linux systems with INTERFACES(5), this can be specified as a pre-up command
+in /etc/network/interfaces so that the interface is always brought up with
+NBASE-T support, e.g.::
+
+  iface eth? inet dhcp
+       pre-up ethtool -s eth? advertise 0x1800000001028 || true
+
 Generic Receive Offload, aka GRO
 --------------------------------
 The driver supports the in-kernel software implementation of GRO. GRO has

Documentation/networking/ipvs-sysctl.rst

@@ -37,8 +37,7 @@ conn_reuse_mode - INTEGER
 
 	0: disable any special handling on port reuse. The new
 	connection will be delivered to the same real server that was
-	servicing the previous connection. This will effectively
-	disable expire_nodest_conn.
+	servicing the previous connection.
 
 	bit 1: enable rescheduling of new connections when it is safe.
 	That is, whenever expire_nodest_conn and for TCP sockets, when

Documentation/sound/hd-audio/models.rst

@@ -326,6 +326,8 @@ usi-headset
     Headset support on USI machines
 dual-codecs
     Lenovo laptops with dual codecs
+alc285-hp-amp-init
+    HP laptops which require speaker amplifier initialization (ALC285)
 
 ALC680
 ======