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, 1079 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
new file mode 100644
index 000000000..18219abba
--- /dev/null
+++ b/drivers/acpi/acpica/evxface.c
@@ -0,0 +1,1079 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acevents.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evxface")
+#if (!ACPI_REDUCED_HARDWARE)
+/* Local prototypes */
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+			    u32 gpe_number,
+			    u32 type,
+			    u8 is_raw_handler,
+			    acpi_gpe_handler address, void *context);
+
+#endif
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_notify_handler
+ *
+ * PARAMETERS:  device          - The device for which notifies will be handled
+ *              handler_type    - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ *                                  ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ *                                  ACPI_ALL_NOTIFY:    Both System and Device
+ *              handler         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for notifications on an ACPI Device,
+ *              thermal_zone, or Processor object.
+ *
+ * NOTES:       The Root namespace object may have only one handler for each
+ *              type of notify (System/Device). Device/Thermal/Processor objects
+ *              may have one device notify handler, and multiple system notify
+ *              handlers.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_notify_handler(acpi_handle device,
+			    u32 handler_type,
+			    acpi_notify_handler handler, void *context)
+{
+	struct acpi_namespace_node *node =
+	    ACPI_CAST_PTR(struct acpi_namespace_node, device);
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *handler_obj;
+	acpi_status status;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(acpi_install_notify_handler);
+
+	/* Parameter validation */
+
+	if ((!device) || (!handler) || (!handler_type) ||
+	    (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Root Object:
+	 * Registering a notify handler on the root object indicates that the
+	 * caller wishes to receive notifications for all objects. Note that
+	 * only one global handler can be registered per notify type.
+	 * Ensure that a handler is not already installed.
+	 */
+	if (device == ACPI_ROOT_OBJECT) {
+		for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+			if (handler_type & (i + 1)) {
+				if (acpi_gbl_global_notify[i].handler) {
+					status = AE_ALREADY_EXISTS;
+					goto unlock_and_exit;
+				}
+
+				acpi_gbl_global_notify[i].handler = handler;
+				acpi_gbl_global_notify[i].context = context;
+			}
+		}
+
+		goto unlock_and_exit;	/* Global notify handler installed, all done */
+	}
+
+	/*
+	 * All Other Objects:
+	 * Caller will only receive notifications specific to the target
+	 * object. Note that only certain object types are allowed to
+	 * receive notifications.
+	 */
+
+	/* Are Notifies allowed on this object? */
+
+	if (!acpi_ev_is_notify_object(node)) {
+		status = AE_TYPE;
+		goto unlock_and_exit;
+	}
+
+	/* Check for an existing internal object, might not exist */
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+
+		/* Create a new object */
+
+		obj_desc = acpi_ut_create_internal_object(node->type);
+		if (!obj_desc) {
+			status = AE_NO_MEMORY;
+			goto unlock_and_exit;
+		}
+
+		/* Attach new object to the Node, remove local reference */
+
+		status = acpi_ns_attach_object(device, obj_desc, node->type);
+		acpi_ut_remove_reference(obj_desc);
+		if (ACPI_FAILURE(status)) {
+			goto unlock_and_exit;
+		}
+	}
+
+	/* Ensure that the handler is not already installed in the lists */
+
+	for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+		if (handler_type & (i + 1)) {
+			handler_obj = obj_desc->common_notify.notify_list[i];
+			while (handler_obj) {
+				if (handler_obj->notify.handler == handler) {
+					status = AE_ALREADY_EXISTS;
+					goto unlock_and_exit;
+				}
+
+				handler_obj = handler_obj->notify.next[i];
+			}
+		}
+	}
+
+	/* Create and populate a new notify handler object */
+
+	handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY);
+	if (!handler_obj) {
+		status = AE_NO_MEMORY;
+		goto unlock_and_exit;
+	}
+
+	handler_obj->notify.node = node;
+	handler_obj->notify.handler_type = handler_type;
+	handler_obj->notify.handler = handler;
+	handler_obj->notify.context = context;
+
+	/* Install the handler at the list head(s) */
+
+	for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+		if (handler_type & (i + 1)) {
+			handler_obj->notify.next[i] =
+			    obj_desc->common_notify.notify_list[i];
+
+			obj_desc->common_notify.notify_list[i] = handler_obj;
+		}
+	}
+
+	/* Add an extra reference if handler was installed in both lists */
+
+	if (handler_type == ACPI_ALL_NOTIFY) {
+		acpi_ut_add_reference(handler_obj);
+	}
+
+unlock_and_exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_notify_handler
+ *
+ * PARAMETERS:  device          - The device for which the handler is installed
+ *              handler_type    - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ *                                  ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ *                                  ACPI_ALL_NOTIFY:    Both System and Device
+ *              handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_notify_handler(acpi_handle device,
+			   u32 handler_type, acpi_notify_handler handler)
+{
+	struct acpi_namespace_node *node =
+	    ACPI_CAST_PTR(struct acpi_namespace_node, device);
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *handler_obj;
+	union acpi_operand_object *previous_handler_obj;
+	acpi_status status = AE_OK;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(acpi_remove_notify_handler);
+
+	/* Parameter validation */
+
+	if ((!device) || (!handler) || (!handler_type) ||
+	    (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Root Object. Global handlers are removed here */
+
+	if (device == ACPI_ROOT_OBJECT) {
+		for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+			if (handler_type & (i + 1)) {
+				status =
+				    acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+				if (ACPI_FAILURE(status)) {
+					return_ACPI_STATUS(status);
+				}
+
+				if (!acpi_gbl_global_notify[i].handler ||
+				    (acpi_gbl_global_notify[i].handler !=
+				     handler)) {
+					status = AE_NOT_EXIST;
+					goto unlock_and_exit;
+				}
+
+				ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+						  "Removing global notify handler\n"));
+
+				acpi_gbl_global_notify[i].handler = NULL;
+				acpi_gbl_global_notify[i].context = NULL;
+
+				(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+				/* Make sure all deferred notify tasks are completed */
+
+				acpi_os_wait_events_complete();
+			}
+		}
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* All other objects: Are Notifies allowed on this object? */
+
+	if (!acpi_ev_is_notify_object(node)) {
+		return_ACPI_STATUS(AE_TYPE);
+	}
+
+	/* Must have an existing internal object */
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/* Internal object exists. Find the handler and remove it */
+
+	for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
+		if (handler_type & (i + 1)) {
+			status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+			if (ACPI_FAILURE(status)) {
+				return_ACPI_STATUS(status);
+			}
+
+			handler_obj = obj_desc->common_notify.notify_list[i];
+			previous_handler_obj = NULL;
+
+			/* Attempt to find the handler in the handler list */
+
+			while (handler_obj &&
+			       (handler_obj->notify.handler != handler)) {
+				previous_handler_obj = handler_obj;
+				handler_obj = handler_obj->notify.next[i];
+			}
+
+			if (!handler_obj) {
+				status = AE_NOT_EXIST;
+				goto unlock_and_exit;
+			}
+
+			/* Remove the handler object from the list */
+
+			if (previous_handler_obj) {	/* Handler is not at the list head */
+				previous_handler_obj->notify.next[i] =
+				    handler_obj->notify.next[i];
+			} else {	/* Handler is at the list head */
+
+				obj_desc->common_notify.notify_list[i] =
+				    handler_obj->notify.next[i];
+			}
+
+			(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+			/* Make sure all deferred notify tasks are completed */
+
+			acpi_os_wait_events_complete();
+			acpi_ut_remove_reference(handler_obj);
+		}
+	}
+
+	return_ACPI_STATUS(status);
+
+unlock_and_exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_exception_handler
+ *
+ * PARAMETERS:  handler         - Pointer to the handler function for the
+ *                                event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Don't allow two handlers. */
+
+	if (acpi_gbl_exception_handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	/* Install the handler */
+
+	acpi_gbl_exception_handler = handler;
+
+cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
+#endif
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_sci_handler
+ *
+ * PARAMETERS:  address             - Address of the handler
+ *              context             - Value passed to the handler on each SCI
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context)
+{
+	struct acpi_sci_handler_info *new_sci_handler;
+	struct acpi_sci_handler_info *sci_handler;
+	acpi_cpu_flags flags;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_sci_handler);
+
+	if (!address) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Allocate and init a handler object */
+
+	new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info));
+	if (!new_sci_handler) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	new_sci_handler->address = address;
+	new_sci_handler->context = context;
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		goto exit;
+	}
+
+	/* Lock list during installation */
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+	sci_handler = acpi_gbl_sci_handler_list;
+
+	/* Ensure handler does not already exist */
+
+	while (sci_handler) {
+		if (address == sci_handler->address) {
+			status = AE_ALREADY_EXISTS;
+			goto unlock_and_exit;
+		}
+
+		sci_handler = sci_handler->next;
+	}
+
+	/* Install the new handler into the global list (at head) */
+
+	new_sci_handler->next = acpi_gbl_sci_handler_list;
+	acpi_gbl_sci_handler_list = new_sci_handler;
+
+unlock_and_exit:
+
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+exit:
+	if (ACPI_FAILURE(status)) {
+		ACPI_FREE(new_sci_handler);
+	}
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_sci_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_sci_handler
+ *
+ * PARAMETERS:  address             - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+acpi_status acpi_remove_sci_handler(acpi_sci_handler address)
+{
+	struct acpi_sci_handler_info *prev_sci_handler;
+	struct acpi_sci_handler_info *next_sci_handler;
+	acpi_cpu_flags flags;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_remove_sci_handler);
+
+	if (!address) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Remove the SCI handler with lock */
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	prev_sci_handler = NULL;
+	next_sci_handler = acpi_gbl_sci_handler_list;
+	while (next_sci_handler) {
+		if (next_sci_handler->address == address) {
+
+			/* Unlink and free the SCI handler info block */
+
+			if (prev_sci_handler) {
+				prev_sci_handler->next = next_sci_handler->next;
+			} else {
+				acpi_gbl_sci_handler_list =
+				    next_sci_handler->next;
+			}
+
+			acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+			ACPI_FREE(next_sci_handler);
+			goto unlock_and_exit;
+		}
+
+		prev_sci_handler = next_sci_handler;
+		next_sci_handler = next_sci_handler->next;
+	}
+
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	status = AE_NOT_EXIST;
+
+unlock_and_exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_global_event_handler
+ *
+ * PARAMETERS:  handler         - Pointer to the global event handler function
+ *              context         - Value passed to the handler on each event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function. The global handler
+ *              is invoked upon each incoming GPE and Fixed Event. It is
+ *              invoked at interrupt level at the time of the event dispatch.
+ *              Can be used to update event counters, etc.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
+
+	/* Parameter validation */
+
+	if (!handler) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Don't allow two handlers. */
+
+	if (acpi_gbl_global_event_handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	acpi_gbl_global_event_handler = handler;
+	acpi_gbl_global_event_handler_context = context;
+
+cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_fixed_event_handler
+ *
+ * PARAMETERS:  event           - Event type to enable.
+ *              handler         - Pointer to the handler function for the
+ *                                event
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ *              event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_fixed_event_handler(u32 event,
+				 acpi_event_handler handler, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
+
+	/* Parameter validation */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Do not allow multiple handlers */
+
+	if (acpi_gbl_fixed_event_handlers[event].handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	/* Install the handler before enabling the event */
+
+	acpi_gbl_fixed_event_handlers[event].handler = handler;
+	acpi_gbl_fixed_event_handlers[event].context = context;
+
+	status = acpi_clear_event(event);
+	if (ACPI_SUCCESS(status))
+		status = acpi_enable_event(event, 0);
+	if (ACPI_FAILURE(status)) {
+		ACPI_WARNING((AE_INFO,
+			      "Could not enable fixed event - %s (%u)",
+			      acpi_ut_get_event_name(event), event));
+
+		/* Remove the handler */
+
+		acpi_gbl_fixed_event_handlers[event].handler = NULL;
+		acpi_gbl_fixed_event_handlers[event].context = NULL;
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+				  "Enabled fixed event %s (%X), Handler=%p\n",
+				  acpi_ut_get_event_name(event), event,
+				  handler));
+	}
+
+cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_fixed_event_handler
+ *
+ * PARAMETERS:  event           - Event type to disable.
+ *              handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
+
+	/* Parameter validation */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Disable the event before removing the handler */
+
+	status = acpi_disable_event(event, 0);
+
+	/* Always Remove the handler */
+
+	acpi_gbl_fixed_event_handlers[event].handler = NULL;
+	acpi_gbl_fixed_event_handlers[event].context = NULL;
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_WARNING((AE_INFO,
+			      "Could not disable fixed event - %s (%u)",
+			      acpi_ut_get_event_name(event), event));
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+				  "Disabled fixed event - %s (%X)\n",
+				  acpi_ut_get_event_name(event), event));
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              is_raw_handler  - Whether this GPE should be handled using
+ *                                the special GPE handler mode.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Internal function to install a handler for a General Purpose
+ *              Event.
+ *
+ ******************************************************************************/
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+			    u32 gpe_number,
+			    u32 type,
+			    u8 is_raw_handler,
+			    acpi_gpe_handler address, void *context)
+{
+	struct acpi_gpe_event_info *gpe_event_info;
+	struct acpi_gpe_handler_info *handler;
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(ev_install_gpe_handler);
+
+	/* Parameter validation */
+
+	if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Allocate and init handler object (before lock) */
+
+	handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info));
+	if (!handler) {
+		status = AE_NO_MEMORY;
+		goto unlock_and_exit;
+	}
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto free_and_exit;
+	}
+
+	/* Make sure that there isn't a handler there already */
+
+	if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_HANDLER) ||
+	    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
+		status = AE_ALREADY_EXISTS;
+		goto free_and_exit;
+	}
+
+	handler->address = address;
+	handler->context = context;
+	handler->method_node = gpe_event_info->dispatch.method_node;
+	handler->original_flags = (u8)(gpe_event_info->flags &
+				       (ACPI_GPE_XRUPT_TYPE_MASK |
+					ACPI_GPE_DISPATCH_MASK));
+
+	/*
+	 * If the GPE is associated with a method, it may have been enabled
+	 * automatically during initialization, in which case it has to be
+	 * disabled now to avoid spurious execution of the handler.
+	 */
+	if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_METHOD) ||
+	     (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
+		handler->originally_enabled = TRUE;
+		(void)acpi_ev_remove_gpe_reference(gpe_event_info);
+
+		/* Sanity check of original type against new type */
+
+		if (type !=
+		    (u32)(gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
+			ACPI_WARNING((AE_INFO,
+				      "GPE type mismatch (level/edge)"));
+		}
+	}
+
+	/* Install the handler */
+
+	gpe_event_info->dispatch.handler = handler;
+
+	/* Setup up dispatch flags to indicate handler (vs. method/notify) */
+
+	gpe_event_info->flags &=
+	    ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+	gpe_event_info->flags |=
+	    (u8)(type |
+		 (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
+		  ACPI_GPE_DISPATCH_HANDLER));
+
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+unlock_and_exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+
+free_and_exit:
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	ACPI_FREE(handler);
+	goto unlock_and_exit;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler(acpi_handle gpe_device,
+			 u32 gpe_number,
+			 u32 type, acpi_gpe_handler address, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+
+	status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
+					     FALSE, address, context);
+
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_raw_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_gpe_raw_handler(acpi_handle gpe_device,
+			     u32 gpe_number,
+			     u32 type, acpi_gpe_handler address, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
+
+	status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
+					     TRUE, address, context);
+
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The event to remove a handler
+ *              address         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_gpe_handler(acpi_handle gpe_device,
+			u32 gpe_number, acpi_gpe_handler address)
+{
+	struct acpi_gpe_event_info *gpe_event_info;
+	struct acpi_gpe_handler_info *handler;
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler);
+
+	/* Parameter validation */
+
+	if (!address) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure that a handler is indeed installed */
+
+	if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+	     ACPI_GPE_DISPATCH_HANDLER) &&
+	    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+	     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
+		status = AE_NOT_EXIST;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure that the installed handler is the same */
+
+	if (gpe_event_info->dispatch.handler->address != address) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Remove the handler */
+
+	handler = gpe_event_info->dispatch.handler;
+	gpe_event_info->dispatch.handler = NULL;
+
+	/* Restore Method node (if any), set dispatch flags */
+
+	gpe_event_info->dispatch.method_node = handler->method_node;
+	gpe_event_info->flags &=
+	    ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+	gpe_event_info->flags |= handler->original_flags;
+
+	/*
+	 * If the GPE was previously associated with a method and it was
+	 * enabled, it should be enabled at this point to restore the
+	 * post-initialization configuration.
+	 */
+	if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_METHOD) ||
+	     (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
+		(void)acpi_ev_add_gpe_reference(gpe_event_info, FALSE);
+		if (ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) {
+
+			/* Poll edge triggered GPEs to handle existing events */
+
+			acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+			(void)acpi_ev_detect_gpe(gpe_device, gpe_event_info,
+						 gpe_number);
+			flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+		}
+	}
+
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+	/* Make sure all deferred GPE tasks are completed */
+
+	acpi_os_wait_events_complete();
+
+	/* Now we can free the handler object */
+
+	ACPI_FREE(handler);
+	return_ACPI_STATUS(status);
+
+unlock_and_exit:
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_acquire_global_lock
+ *
+ * PARAMETERS:  timeout         - How long the caller is willing to wait
+ *              handle          - Where the handle to the lock is returned
+ *                                (if acquired)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ * Note: Allows callers with the same thread ID to acquire the global lock
+ * multiple times. In other words, externally, the behavior of the global lock
+ * is identical to an AML mutex. On the first acquire, a new handle is
+ * returned. On any subsequent calls to acquire by the same thread, the same
+ * handle is returned.
+ *
+ ******************************************************************************/
+acpi_status acpi_acquire_global_lock(u16 timeout, u32 *handle)
+{
+	acpi_status status;
+
+	if (!handle) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Must lock interpreter to prevent race conditions */
+
+	acpi_ex_enter_interpreter();
+
+	status = acpi_ex_acquire_mutex_object(timeout,
+					      acpi_gbl_global_lock_mutex,
+					      acpi_os_get_thread_id());
+
+	if (ACPI_SUCCESS(status)) {
+
+		/* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */
+
+		*handle = acpi_gbl_global_lock_handle;
+	}
+
+	acpi_ex_exit_interpreter();
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_release_global_lock
+ *
+ * PARAMETERS:  handle      - Returned from acpi_acquire_global_lock
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
+ *
+ ******************************************************************************/
+acpi_status acpi_release_global_lock(u32 handle)
+{
+	acpi_status status;
+
+	if (!handle || (handle != acpi_gbl_global_lock_handle)) {
+		return (AE_NOT_ACQUIRED);
+	}
+
+	status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
+#endif				/* !ACPI_REDUCED_HARDWARE */