Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 531 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/dspkginit.c b/drivers/acpi/acpica/dspkginit.c
new file mode 100644
index 000000000..1624d6e7d
--- /dev/null
+++ b/drivers/acpi/acpica/dspkginit.c
@@ -0,0 +1,531 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: dspkginit - Completion of deferred package initialization
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "amlcode.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acparser.h"
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("dspkginit")
+
+/* Local prototypes */
+static void
+acpi_ds_resolve_package_element(union acpi_operand_object **element);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_build_internal_package_obj
+ *
+ * PARAMETERS:  walk_state      - Current walk state
+ *              op              - Parser object to be translated
+ *              element_count   - Number of elements in the package - this is
+ *                                the num_elements argument to Package()
+ *              obj_desc_ptr    - Where the ACPI internal object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Translate a parser Op package object to the equivalent
+ *              namespace object
+ *
+ * NOTE: The number of elements in the package will be always be the num_elements
+ * count, regardless of the number of elements in the package list. If
+ * num_elements is smaller, only that many package list elements are used.
+ * if num_elements is larger, the Package object is padded out with
+ * objects of type Uninitialized (as per ACPI spec.)
+ *
+ * Even though the ASL compilers do not allow num_elements to be smaller
+ * than the Package list length (for the fixed length package opcode), some
+ * BIOS code modifies the AML on the fly to adjust the num_elements, and
+ * this code compensates for that. This also provides compatibility with
+ * other AML interpreters.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
+				   union acpi_parse_object *op,
+				   u32 element_count,
+				   union acpi_operand_object **obj_desc_ptr)
+{
+	union acpi_parse_object *arg;
+	union acpi_parse_object *parent;
+	union acpi_operand_object *obj_desc = NULL;
+	acpi_status status = AE_OK;
+	u8 module_level_code = FALSE;
+	u16 reference_count;
+	u32 index;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
+
+	/* Check if we are executing module level code */
+
+	if (walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL) {
+		module_level_code = TRUE;
+	}
+
+	/* Find the parent of a possibly nested package */
+
+	parent = op->common.parent;
+	while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
+	       (parent->common.aml_opcode == AML_VARIABLE_PACKAGE_OP)) {
+		parent = parent->common.parent;
+	}
+
+	/*
+	 * If we are evaluating a Named package object of the form:
+	 *      Name (xxxx, Package)
+	 * the package object already exists, otherwise it must be created.
+	 */
+	obj_desc = *obj_desc_ptr;
+	if (!obj_desc) {
+		obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
+		*obj_desc_ptr = obj_desc;
+		if (!obj_desc) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		obj_desc->package.node = parent->common.node;
+	}
+
+	if (obj_desc->package.flags & AOPOBJ_DATA_VALID) {	/* Just in case */
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Allocate the element array (array of pointers to the individual
+	 * objects) if necessary. the count is based on the num_elements
+	 * parameter. Add an extra pointer slot so that the list is always
+	 * null terminated.
+	 */
+	if (!obj_desc->package.elements) {
+		obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
+								   element_count
+								   +
+								   1) *
+								  sizeof(void
+									 *));
+
+		if (!obj_desc->package.elements) {
+			acpi_ut_delete_object_desc(obj_desc);
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		obj_desc->package.count = element_count;
+	}
+
+	/* First arg is element count. Second arg begins the initializer list */
+
+	arg = op->common.value.arg;
+	arg = arg->common.next;
+
+	/*
+	 * If we are executing module-level code, we will defer the
+	 * full resolution of the package elements in order to support
+	 * forward references from the elements. This provides
+	 * compatibility with other ACPI implementations.
+	 */
+	if (module_level_code) {
+		obj_desc->package.aml_start = walk_state->aml;
+		obj_desc->package.aml_length = 0;
+
+		ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE,
+				      "%s: Deferring resolution of Package elements\n",
+				      ACPI_GET_FUNCTION_NAME));
+	}
+
+	/*
+	 * Initialize the elements of the package, up to the num_elements count.
+	 * Package is automatically padded with uninitialized (NULL) elements
+	 * if num_elements is greater than the package list length. Likewise,
+	 * Package is truncated if num_elements is less than the list length.
+	 */
+	for (i = 0; arg && (i < element_count); i++) {
+		if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
+			if (!arg->common.node) {
+				/*
+				 * This is the case where an expression has returned a value.
+				 * The use of expressions (term_args) within individual
+				 * package elements is not supported by the AML interpreter,
+				 * even though the ASL grammar supports it. Example:
+				 *
+				 *      Name (INT1, 0x1234)
+				 *
+				 *      Name (PKG3, Package () {
+				 *          Add (INT1, 0xAAAA0000)
+				 *      })
+				 *
+				 *  1) No known AML interpreter supports this type of construct
+				 *  2) This fixes a fault if the construct is encountered
+				 */
+				ACPI_EXCEPTION((AE_INFO, AE_SUPPORT,
+						"Expressions within package elements are not supported"));
+
+				/* Cleanup the return object, it is not needed */
+
+				acpi_ut_remove_reference(walk_state->results->
+							 results.obj_desc[0]);
+				return_ACPI_STATUS(AE_SUPPORT);
+			}
+
+			if (arg->common.node->type == ACPI_TYPE_METHOD) {
+				/*
+				 * A method reference "looks" to the parser to be a method
+				 * invocation, so we special case it here
+				 */
+				arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
+				status =
+				    acpi_ds_build_internal_object(walk_state,
+								  arg,
+								  &obj_desc->
+								  package.
+								  elements[i]);
+			} else {
+				/* This package element is already built, just get it */
+
+				obj_desc->package.elements[i] =
+				    ACPI_CAST_PTR(union acpi_operand_object,
+						  arg->common.node);
+			}
+		} else {
+			status =
+			    acpi_ds_build_internal_object(walk_state, arg,
+							  &obj_desc->package.
+							  elements[i]);
+			if (status == AE_NOT_FOUND) {
+				ACPI_ERROR((AE_INFO, "%-48s",
+					    "****DS namepath not found"));
+			}
+
+			if (!module_level_code) {
+				/*
+				 * Initialize this package element. This function handles the
+				 * resolution of named references within the package.
+				 * Forward references from module-level code are deferred
+				 * until all ACPI tables are loaded.
+				 */
+				acpi_ds_init_package_element(0,
+							     obj_desc->package.
+							     elements[i], NULL,
+							     &obj_desc->package.
+							     elements[i]);
+			}
+		}
+
+		if (*obj_desc_ptr) {
+
+			/* Existing package, get existing reference count */
+
+			reference_count =
+			    (*obj_desc_ptr)->common.reference_count;
+			if (reference_count > 1) {
+
+				/* Make new element ref count match original ref count */
+				/* TBD: Probably need an acpi_ut_add_references function */
+
+				for (index = 0;
+				     index < ((u32)reference_count - 1);
+				     index++) {
+					acpi_ut_add_reference((obj_desc->
+							       package.
+							       elements[i]));
+				}
+			}
+		}
+
+		arg = arg->common.next;
+	}
+
+	/* Check for match between num_elements and actual length of package_list */
+
+	if (arg) {
+		/*
+		 * num_elements was exhausted, but there are remaining elements in
+		 * the package_list. Truncate the package to num_elements.
+		 *
+		 * Note: technically, this is an error, from ACPI spec: "It is an
+		 * error for NumElements to be less than the number of elements in
+		 * the PackageList". However, we just print a message and no
+		 * exception is returned. This provides compatibility with other
+		 * ACPI implementations. Some firmware implementations will alter
+		 * the num_elements on the fly, possibly creating this type of
+		 * ill-formed package object.
+		 */
+		while (arg) {
+			/*
+			 * We must delete any package elements that were created earlier
+			 * and are not going to be used because of the package truncation.
+			 */
+			if (arg->common.node) {
+				acpi_ut_remove_reference(ACPI_CAST_PTR
+							 (union
+							  acpi_operand_object,
+							  arg->common.node));
+				arg->common.node = NULL;
+			}
+
+			/* Find out how many elements there really are */
+
+			i++;
+			arg = arg->common.next;
+		}
+
+		ACPI_INFO(("Actual Package length (%u) is larger than "
+			   "NumElements field (%u), truncated",
+			   i, element_count));
+	} else if (i < element_count) {
+		/*
+		 * Arg list (elements) was exhausted, but we did not reach
+		 * num_elements count.
+		 *
+		 * Note: this is not an error, the package is padded out
+		 * with NULLs as per the ACPI specification.
+		 */
+		ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
+				      "%s: Package List length (%u) smaller than NumElements "
+				      "count (%u), padded with null elements\n",
+				      ACPI_GET_FUNCTION_NAME, i,
+				      element_count));
+	}
+
+	/* Module-level packages will be resolved later */
+
+	if (!module_level_code) {
+		obj_desc->package.flags |= AOPOBJ_DATA_VALID;
+	}
+
+	op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_init_package_element
+ *
+ * PARAMETERS:  acpi_pkg_callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Resolve a named reference element within a package object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_init_package_element(u8 object_type,
+			     union acpi_operand_object *source_object,
+			     union acpi_generic_state *state, void *context)
+{
+	union acpi_operand_object **element_ptr;
+
+	ACPI_FUNCTION_TRACE(ds_init_package_element);
+
+	if (!source_object) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * The following code is a bit of a hack to workaround a (current)
+	 * limitation of the acpi_pkg_callback interface. We need a pointer
+	 * to the location within the element array because a new object
+	 * may be created and stored there.
+	 */
+	if (context) {
+
+		/* A direct call was made to this function */
+
+		element_ptr = (union acpi_operand_object **)context;
+	} else {
+		/* Call came from acpi_ut_walk_package_tree */
+
+		element_ptr = state->pkg.this_target_obj;
+	}
+
+	/* We are only interested in reference objects/elements */
+
+	if (source_object->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
+
+		/* Attempt to resolve the (named) reference to a namespace node */
+
+		acpi_ds_resolve_package_element(element_ptr);
+	} else if (source_object->common.type == ACPI_TYPE_PACKAGE) {
+		source_object->package.flags |= AOPOBJ_DATA_VALID;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_resolve_package_element
+ *
+ * PARAMETERS:  element_ptr         - Pointer to a reference object
+ *
+ * RETURN:      Possible new element is stored to the indirect element_ptr
+ *
+ * DESCRIPTION: Resolve a package element that is a reference to a named
+ *              object.
+ *
+ ******************************************************************************/
+
+static void
+acpi_ds_resolve_package_element(union acpi_operand_object **element_ptr)
+{
+	acpi_status status;
+	acpi_status status2;
+	union acpi_generic_state scope_info;
+	union acpi_operand_object *element = *element_ptr;
+	struct acpi_namespace_node *resolved_node;
+	struct acpi_namespace_node *original_node;
+	char *external_path = "";
+	acpi_object_type type;
+
+	ACPI_FUNCTION_TRACE(ds_resolve_package_element);
+
+	/* Check if reference element is already resolved */
+
+	if (element->reference.resolved) {
+		ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE,
+				      "%s: Package element is already resolved\n",
+				      ACPI_GET_FUNCTION_NAME));
+
+		return_VOID;
+	}
+
+	/* Element must be a reference object of correct type */
+
+	scope_info.scope.node = element->reference.node;	/* Prefix node */
+
+	status = acpi_ns_lookup(&scope_info, (char *)element->reference.aml,
+				ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+				ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
+				NULL, &resolved_node);
+	if (ACPI_FAILURE(status)) {
+		if ((status == AE_NOT_FOUND)
+		    && acpi_gbl_ignore_package_resolution_errors) {
+			/*
+			 * Optionally be silent about the NOT_FOUND case for the referenced
+			 * name. Although this is potentially a serious problem,
+			 * it can generate a lot of noise/errors on platforms whose
+			 * firmware carries around a bunch of unused Package objects.
+			 * To disable these errors, set this global to TRUE:
+			 *     acpi_gbl_ignore_package_resolution_errors
+			 *
+			 * If the AML actually tries to use such a package, the unresolved
+			 * element(s) will be replaced with NULL elements.
+			 */
+
+			/* Referenced name not found, set the element to NULL */
+
+			acpi_ut_remove_reference(*element_ptr);
+			*element_ptr = NULL;
+			return_VOID;
+		}
+
+		status2 = acpi_ns_externalize_name(ACPI_UINT32_MAX,
+						   (char *)element->reference.
+						   aml, NULL, &external_path);
+
+		ACPI_EXCEPTION((AE_INFO, status,
+				"While resolving a named reference package element - %s",
+				external_path));
+		if (ACPI_SUCCESS(status2)) {
+			ACPI_FREE(external_path);
+		}
+
+		/* Could not resolve name, set the element to NULL */
+
+		acpi_ut_remove_reference(*element_ptr);
+		*element_ptr = NULL;
+		return_VOID;
+	} else if (resolved_node->type == ACPI_TYPE_ANY) {
+
+		/* Named reference not resolved, return a NULL package element */
+
+		ACPI_ERROR((AE_INFO,
+			    "Could not resolve named package element [%4.4s] in [%4.4s]",
+			    resolved_node->name.ascii,
+			    scope_info.scope.node->name.ascii));
+		*element_ptr = NULL;
+		return_VOID;
+	}
+
+	/*
+	 * Special handling for Alias objects. We need resolved_node to point
+	 * to the Alias target. This effectively "resolves" the alias.
+	 */
+	if (resolved_node->type == ACPI_TYPE_LOCAL_ALIAS) {
+		resolved_node = ACPI_CAST_PTR(struct acpi_namespace_node,
+					      resolved_node->object);
+	}
+
+	/* Update the reference object */
+
+	element->reference.resolved = TRUE;
+	element->reference.node = resolved_node;
+	type = element->reference.node->type;
+
+	/*
+	 * Attempt to resolve the node to a value before we insert it into
+	 * the package. If this is a reference to a common data type,
+	 * resolve it immediately. According to the ACPI spec, package
+	 * elements can only be "data objects" or method references.
+	 * Attempt to resolve to an Integer, Buffer, String or Package.
+	 * If cannot, return the named reference (for things like Devices,
+	 * Methods, etc.) Buffer Fields and Fields will resolve to simple
+	 * objects (int/buf/str/pkg).
+	 *
+	 * NOTE: References to things like Devices, Methods, Mutexes, etc.
+	 * will remain as named references. This behavior is not described
+	 * in the ACPI spec, but it appears to be an oversight.
+	 */
+	original_node = resolved_node;
+	status = acpi_ex_resolve_node_to_value(&resolved_node, NULL);
+	if (ACPI_FAILURE(status)) {
+		return_VOID;
+	}
+
+	switch (type) {
+		/*
+		 * These object types are a result of named references, so we will
+		 * leave them as reference objects. In other words, these types
+		 * have no intrinsic "value".
+		 */
+	case ACPI_TYPE_DEVICE:
+	case ACPI_TYPE_THERMAL:
+	case ACPI_TYPE_METHOD:
+		break;
+
+	case ACPI_TYPE_MUTEX:
+	case ACPI_TYPE_POWER:
+	case ACPI_TYPE_PROCESSOR:
+	case ACPI_TYPE_EVENT:
+	case ACPI_TYPE_REGION:
+
+		/* acpi_ex_resolve_node_to_value gave these an extra reference */
+
+		acpi_ut_remove_reference(original_node->object);
+		break;
+
+	default:
+		/*
+		 * For all other types - the node was resolved to an actual
+		 * operand object with a value, return the object. Remove
+		 * a reference on the existing object.
+		 */
+		acpi_ut_remove_reference(element);
+		*element_ptr = (union acpi_operand_object *)resolved_node;
+		break;
+	}
+
+	return_VOID;
+}