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, 681 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/dsmthdat.c b/drivers/acpi/acpica/dsmthdat.c
new file mode 100644
index 000000000..eca50517a
--- /dev/null
+++ b/drivers/acpi/acpica/dsmthdat.c
@@ -0,0 +1,681 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: dsmthdat - control method arguments and local variables
+ *
+ ******************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acdispat.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_DISPATCHER
+ACPI_MODULE_NAME("dsmthdat")
+
+/* Local prototypes */
+static void
+acpi_ds_method_data_delete_value(u8 type,
+				 u32 index, struct acpi_walk_state *walk_state);
+
+static acpi_status
+acpi_ds_method_data_set_value(u8 type,
+			      u32 index,
+			      union acpi_operand_object *object,
+			      struct acpi_walk_state *walk_state);
+
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+acpi_object_type
+acpi_ds_method_data_get_type(u16 opcode,
+			     u32 index, struct acpi_walk_state *walk_state);
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_init
+ *
+ * PARAMETERS:  walk_state          - Current walk state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize the data structures that hold the method's arguments
+ *              and locals. The data struct is an array of namespace nodes for
+ *              each - this allows ref_of and de_ref_of to work properly for these
+ *              special data types.
+ *
+ * NOTES:       walk_state fields are initialized to zero by the
+ *              ACPI_ALLOCATE_ZEROED().
+ *
+ *              A pseudo-Namespace Node is assigned to each argument and local
+ *              so that ref_of() can return a pointer to the Node.
+ *
+ ******************************************************************************/
+
+void acpi_ds_method_data_init(struct acpi_walk_state *walk_state)
+{
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_init);
+
+	/* Init the method arguments */
+
+	for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) {
+		ACPI_MOVE_32_TO_32(&walk_state->arguments[i].name,
+				   NAMEOF_ARG_NTE);
+
+		walk_state->arguments[i].name.integer |= (i << 24);
+		walk_state->arguments[i].descriptor_type = ACPI_DESC_TYPE_NAMED;
+		walk_state->arguments[i].type = ACPI_TYPE_ANY;
+		walk_state->arguments[i].flags = ANOBJ_METHOD_ARG;
+	}
+
+	/* Init the method locals */
+
+	for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) {
+		ACPI_MOVE_32_TO_32(&walk_state->local_variables[i].name,
+				   NAMEOF_LOCAL_NTE);
+
+		walk_state->local_variables[i].name.integer |= (i << 24);
+		walk_state->local_variables[i].descriptor_type =
+		    ACPI_DESC_TYPE_NAMED;
+		walk_state->local_variables[i].type = ACPI_TYPE_ANY;
+		walk_state->local_variables[i].flags = ANOBJ_METHOD_LOCAL;
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_delete_all
+ *
+ * PARAMETERS:  walk_state          - Current walk state object
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Delete method locals and arguments. Arguments are only
+ *              deleted if this method was called from another method.
+ *
+ ******************************************************************************/
+
+void acpi_ds_method_data_delete_all(struct acpi_walk_state *walk_state)
+{
+	u32 index;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_delete_all);
+
+	/* Detach the locals */
+
+	for (index = 0; index < ACPI_METHOD_NUM_LOCALS; index++) {
+		if (walk_state->local_variables[index].object) {
+			ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Local%u=%p\n",
+					  index,
+					  walk_state->local_variables[index].
+					  object));
+
+			/* Detach object (if present) and remove a reference */
+
+			acpi_ns_detach_object(&walk_state->
+					      local_variables[index]);
+		}
+	}
+
+	/* Detach the arguments */
+
+	for (index = 0; index < ACPI_METHOD_NUM_ARGS; index++) {
+		if (walk_state->arguments[index].object) {
+			ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Arg%u=%p\n",
+					  index,
+					  walk_state->arguments[index].object));
+
+			/* Detach object (if present) and remove a reference */
+
+			acpi_ns_detach_object(&walk_state->arguments[index]);
+		}
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_init_args
+ *
+ * PARAMETERS:  *params         - Pointer to a parameter list for the method
+ *              max_param_count - The arg count for this method
+ *              walk_state      - Current walk state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize arguments for a method. The parameter list is a list
+ *              of ACPI operand objects, either null terminated or whose length
+ *              is defined by max_param_count.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_method_data_init_args(union acpi_operand_object **params,
+			      u32 max_param_count,
+			      struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	u32 index = 0;
+
+	ACPI_FUNCTION_TRACE_PTR(ds_method_data_init_args, params);
+
+	if (!params) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "No parameter list passed to method\n"));
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Copy passed parameters into the new method stack frame */
+
+	while ((index < ACPI_METHOD_NUM_ARGS) &&
+	       (index < max_param_count) && params[index]) {
+		/*
+		 * A valid parameter.
+		 * Store the argument in the method/walk descriptor.
+		 * Do not copy the arg in order to implement call by reference
+		 */
+		status =
+		    acpi_ds_method_data_set_value(ACPI_REFCLASS_ARG, index,
+						  params[index], walk_state);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+		index++;
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%u args passed to method\n", index));
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_get_node
+ *
+ * PARAMETERS:  type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
+ *              index               - Which Local or Arg whose type to get
+ *              walk_state          - Current walk state object
+ *              node                - Where the node is returned.
+ *
+ * RETURN:      Status and node
+ *
+ * DESCRIPTION: Get the Node associated with a local or arg.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_method_data_get_node(u8 type,
+			     u32 index,
+			     struct acpi_walk_state *walk_state,
+			     struct acpi_namespace_node **node)
+{
+	ACPI_FUNCTION_TRACE(ds_method_data_get_node);
+
+	/*
+	 * Method Locals and Arguments are supported
+	 */
+	switch (type) {
+	case ACPI_REFCLASS_LOCAL:
+
+		if (index > ACPI_METHOD_MAX_LOCAL) {
+			ACPI_ERROR((AE_INFO,
+				    "Local index %u is invalid (max %u)",
+				    index, ACPI_METHOD_MAX_LOCAL));
+			return_ACPI_STATUS(AE_AML_INVALID_INDEX);
+		}
+
+		/* Return a pointer to the pseudo-node */
+
+		*node = &walk_state->local_variables[index];
+		break;
+
+	case ACPI_REFCLASS_ARG:
+
+		if (index > ACPI_METHOD_MAX_ARG) {
+			ACPI_ERROR((AE_INFO,
+				    "Arg index %u is invalid (max %u)",
+				    index, ACPI_METHOD_MAX_ARG));
+			return_ACPI_STATUS(AE_AML_INVALID_INDEX);
+		}
+
+		/* Return a pointer to the pseudo-node */
+
+		*node = &walk_state->arguments[index];
+		break;
+
+	default:
+
+		ACPI_ERROR((AE_INFO, "Type %u is invalid", type));
+		return_ACPI_STATUS(AE_TYPE);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_set_value
+ *
+ * PARAMETERS:  type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
+ *              index               - Which Local or Arg to get
+ *              object              - Object to be inserted into the stack entry
+ *              walk_state          - Current walk state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.
+ *              Note: There is no "implicit conversion" for locals.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ds_method_data_set_value(u8 type,
+			      u32 index,
+			      union acpi_operand_object *object,
+			      struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_set_value);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+			  "NewObj %p Type %2.2X, Refs=%u [%s]\n", object,
+			  type, object->common.reference_count,
+			  acpi_ut_get_type_name(object->common.type)));
+
+	/* Get the namespace node for the arg/local */
+
+	status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Increment ref count so object can't be deleted while installed.
+	 * NOTE: We do not copy the object in order to preserve the call by
+	 * reference semantics of ACPI Control Method invocation.
+	 * (See ACPI Specification 2.0C)
+	 */
+	acpi_ut_add_reference(object);
+
+	/* Install the object */
+
+	node->object = object;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_get_value
+ *
+ * PARAMETERS:  type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
+ *              index               - Which localVar or argument to get
+ *              walk_state          - Current walk state object
+ *              dest_desc           - Where Arg or Local value is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Retrieve value of selected Arg or Local for this method
+ *              Used only in acpi_ex_resolve_to_value().
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_method_data_get_value(u8 type,
+			      u32 index,
+			      struct acpi_walk_state *walk_state,
+			      union acpi_operand_object **dest_desc)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *object;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_get_value);
+
+	/* Validate the object descriptor */
+
+	if (!dest_desc) {
+		ACPI_ERROR((AE_INFO, "Null object descriptor pointer"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Get the namespace node for the arg/local */
+
+	status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Get the object from the node */
+
+	object = node->object;
+
+	/* Examine the returned object, it must be valid. */
+
+	if (!object) {
+		/*
+		 * Index points to uninitialized object.
+		 * This means that either 1) The expected argument was
+		 * not passed to the method, or 2) A local variable
+		 * was referenced by the method (via the ASL)
+		 * before it was initialized. Either case is an error.
+		 */
+
+		/* If slack enabled, init the local_x/arg_x to an Integer of value zero */
+
+		if (acpi_gbl_enable_interpreter_slack) {
+			object = acpi_ut_create_integer_object((u64) 0);
+			if (!object) {
+				return_ACPI_STATUS(AE_NO_MEMORY);
+			}
+
+			node->object = object;
+		}
+
+		/* Otherwise, return the error */
+
+		else
+			switch (type) {
+			case ACPI_REFCLASS_ARG:
+
+				ACPI_ERROR((AE_INFO,
+					    "Uninitialized Arg[%u] at node %p",
+					    index, node));
+
+				return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG);
+
+			case ACPI_REFCLASS_LOCAL:
+				/*
+				 * No error message for this case, will be trapped again later to
+				 * detect and ignore cases of Store(local_x,local_x)
+				 */
+				return_ACPI_STATUS(AE_AML_UNINITIALIZED_LOCAL);
+
+			default:
+
+				ACPI_ERROR((AE_INFO,
+					    "Not a Arg/Local opcode: 0x%X",
+					    type));
+				return_ACPI_STATUS(AE_AML_INTERNAL);
+			}
+	}
+
+	/*
+	 * The Index points to an initialized and valid object.
+	 * Return an additional reference to the object
+	 */
+	*dest_desc = object;
+	acpi_ut_add_reference(object);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_delete_value
+ *
+ * PARAMETERS:  type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
+ *              index               - Which localVar or argument to delete
+ *              walk_state          - Current walk state object
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Delete the entry at Opcode:Index. Inserts
+ *              a null into the stack slot after the object is deleted.
+ *
+ ******************************************************************************/
+
+static void
+acpi_ds_method_data_delete_value(u8 type,
+				 u32 index, struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *object;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_delete_value);
+
+	/* Get the namespace node for the arg/local */
+
+	status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
+	if (ACPI_FAILURE(status)) {
+		return_VOID;
+	}
+
+	/* Get the associated object */
+
+	object = acpi_ns_get_attached_object(node);
+
+	/*
+	 * Undefine the Arg or Local by setting its descriptor
+	 * pointer to NULL. Locals/Args can contain both
+	 * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
+	 */
+	node->object = NULL;
+
+	if ((object) &&
+	    (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_OPERAND)) {
+		/*
+		 * There is a valid object.
+		 * Decrement the reference count by one to balance the
+		 * increment when the object was stored.
+		 */
+		acpi_ut_remove_reference(object);
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_store_object_to_local
+ *
+ * PARAMETERS:  type                - Either ACPI_REFCLASS_LOCAL or
+ *                                    ACPI_REFCLASS_ARG
+ *              index               - Which Local or Arg to set
+ *              obj_desc            - Value to be stored
+ *              walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Store a value in an Arg or Local. The obj_desc is installed
+ *              as the new value for the Arg or Local and the reference count
+ *              for obj_desc is incremented.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_store_object_to_local(u8 type,
+			      u32 index,
+			      union acpi_operand_object *obj_desc,
+			      struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *current_obj_desc;
+	union acpi_operand_object *new_obj_desc;
+
+	ACPI_FUNCTION_TRACE(ds_store_object_to_local);
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",
+			  type, index, obj_desc));
+
+	/* Parameter validation */
+
+	if (!obj_desc) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Get the namespace node for the arg/local */
+
+	status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	current_obj_desc = acpi_ns_get_attached_object(node);
+	if (current_obj_desc == obj_desc) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p already installed!\n",
+				  obj_desc));
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * If the reference count on the object is more than one, we must
+	 * take a copy of the object before we store. A reference count
+	 * of exactly 1 means that the object was just created during the
+	 * evaluation of an expression, and we can safely use it since it
+	 * is not used anywhere else.
+	 */
+	new_obj_desc = obj_desc;
+	if (obj_desc->common.reference_count > 1) {
+		status =
+		    acpi_ut_copy_iobject_to_iobject(obj_desc, &new_obj_desc,
+						    walk_state);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/*
+	 * If there is an object already in this slot, we either
+	 * have to delete it, or if this is an argument and there
+	 * is an object reference stored there, we have to do
+	 * an indirect store!
+	 */
+	if (current_obj_desc) {
+		/*
+		 * Check for an indirect store if an argument
+		 * contains an object reference (stored as an Node).
+		 * We don't allow this automatic dereferencing for
+		 * locals, since a store to a local should overwrite
+		 * anything there, including an object reference.
+		 *
+		 * If both Arg0 and Local0 contain ref_of (Local4):
+		 *
+		 * Store (1, Arg0)             - Causes indirect store to local4
+		 * Store (1, Local0)           - Stores 1 in local0, overwriting
+		 *                                  the reference to local4
+		 * Store (1, de_refof (Local0)) - Causes indirect store to local4
+		 *
+		 * Weird, but true.
+		 */
+		if (type == ACPI_REFCLASS_ARG) {
+			/*
+			 * If we have a valid reference object that came from ref_of(),
+			 * do the indirect store
+			 */
+			if ((ACPI_GET_DESCRIPTOR_TYPE(current_obj_desc) ==
+			     ACPI_DESC_TYPE_OPERAND) &&
+			    (current_obj_desc->common.type ==
+			     ACPI_TYPE_LOCAL_REFERENCE) &&
+			    (current_obj_desc->reference.class ==
+			     ACPI_REFCLASS_REFOF)) {
+				ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+						  "Arg (%p) is an ObjRef(Node), storing in node %p\n",
+						  new_obj_desc,
+						  current_obj_desc));
+
+				/*
+				 * Store this object to the Node (perform the indirect store)
+				 * NOTE: No implicit conversion is performed, as per the ACPI
+				 * specification rules on storing to Locals/Args.
+				 */
+				status =
+				    acpi_ex_store_object_to_node(new_obj_desc,
+								 current_obj_desc->
+								 reference.
+								 object,
+								 walk_state,
+								 ACPI_NO_IMPLICIT_CONVERSION);
+
+				/* Remove local reference if we copied the object above */
+
+				if (new_obj_desc != obj_desc) {
+					acpi_ut_remove_reference(new_obj_desc);
+				}
+
+				return_ACPI_STATUS(status);
+			}
+		}
+
+		/* Delete the existing object before storing the new one */
+
+		acpi_ds_method_data_delete_value(type, index, walk_state);
+	}
+
+	/*
+	 * Install the Obj descriptor (*new_obj_desc) into
+	 * the descriptor for the Arg or Local.
+	 * (increments the object reference count by one)
+	 */
+	status =
+	    acpi_ds_method_data_set_value(type, index, new_obj_desc,
+					  walk_state);
+
+	/* Remove local reference if we copied the object above */
+
+	if (new_obj_desc != obj_desc) {
+		acpi_ut_remove_reference(new_obj_desc);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_method_data_get_type
+ *
+ * PARAMETERS:  opcode              - Either AML_FIRST LOCAL_OP or
+ *                                    AML_FIRST_ARG_OP
+ *              index               - Which Local or Arg whose type to get
+ *              walk_state          - Current walk state object
+ *
+ * RETURN:      Data type of current value of the selected Arg or Local
+ *
+ * DESCRIPTION: Get the type of the object stored in the Local or Arg
+ *
+ ******************************************************************************/
+
+acpi_object_type
+acpi_ds_method_data_get_type(u16 opcode,
+			     u32 index, struct acpi_walk_state *walk_state)
+{
+	acpi_status status;
+	struct acpi_namespace_node *node;
+	union acpi_operand_object *object;
+
+	ACPI_FUNCTION_TRACE(ds_method_data_get_type);
+
+	/* Get the namespace node for the arg/local */
+
+	status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
+	if (ACPI_FAILURE(status)) {
+		return_VALUE((ACPI_TYPE_NOT_FOUND));
+	}
+
+	/* Get the object */
+
+	object = acpi_ns_get_attached_object(node);
+	if (!object) {
+
+		/* Uninitialized local/arg, return TYPE_ANY */
+
+		return_VALUE(ACPI_TYPE_ANY);
+	}
+
+	/* Get the object type */
+
+	return_VALUE(object->type);
+}
+#endif