Merge tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:

 - Introduction of device PM QoS flags.

 - ACPI device power management update allowing subsystems other than
   PCI to use it more easily.

 - ACPI device enumeration rework allowing additional kinds of devices
   to be enumerated via ACPI.  From Mika Westerberg, Adrian Hunter,
   Mathias Nyman, Andy Shevchenko, and Rafael J. Wysocki.

 - ACPICA update to version 20121018 from Bob Moore and Lv Zheng.

 - ACPI memory hotplug update from Wen Congyang and Yasuaki Ishimatsu.

 - Introduction of acpi_handle_<level>() messaging macros and ACPI-based
   CPU hot-remove support from Toshi Kani.

 - ACPI EC updates from Feng Tang.

 - cpufreq updates from Viresh Kumar, Fabio Baltieri and others.

 - cpuidle changes to quickly notice governor prediction failure from
   Youquan Song.

 - Support for using multiple cpuidle drivers at the same time and
   cpuidle cleanups from Daniel Lezcano.

 - devfreq updates from Nishanth Menon and others.

 - cpupower update from Thomas Renninger.

 - Fixes and small cleanups all over the place.

* tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (196 commits)
  mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
  ACPI: add Haswell LPSS devices to acpi_platform_device_ids list
  ACPI: add documentation about ACPI 5 enumeration
  pnpacpi: fix incorrect TEST_ALPHA() test
  ACPI / PM: Fix header of acpi_dev_pm_detach() in acpi.h
  ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000
  ACPI : do not use Lid and Sleep button for S5 wakeup
  ACPI / PNP: Do not crash due to stale pointer use during system resume
  ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist
  ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set
  spi / ACPI: add ACPI enumeration support
  gpio / ACPI: add ACPI support
  PM / devfreq: remove compiler error with module governors (2)
  cpupower: IvyBridge (0x3a and 0x3e models) support
  cpupower: Provide -c param for cpupower monitor to schedule process on all cores
  cpupower tools: Fix warning and a bug with the cpu package count
  cpupower tools: Fix malloc of cpu_info structure
  cpupower tools: Fix issues with sysfs_topology_read_file
  cpupower tools: Fix minor warnings
  cpupower tools: Update .gitignore for files created in the debug directories
  ...

1 files changed, 323 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/utcache.c b/drivers/acpi/acpica/utcache.c
new file mode 100644
index 000000000000..e1d40ed26390
--- /dev/null
+++ b/drivers/acpi/acpica/utcache.c
@@ -0,0 +1,323 @@
+/******************************************************************************
+ *
+ * Module Name: utcache - local cache allocation routines
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utcache")
+
+#ifdef ACPI_USE_LOCAL_CACHE
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_create_cache
+ *
+ * PARAMETERS:  cache_name      - Ascii name for the cache
+ *              object_size     - Size of each cached object
+ *              max_depth       - Maximum depth of the cache (in objects)
+ *              return_cache    - Where the new cache object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create a cache object
+ *
+ ******************************************************************************/
+acpi_status
+acpi_os_create_cache(char *cache_name,
+		     u16 object_size,
+		     u16 max_depth, struct acpi_memory_list ** return_cache)
+{
+	struct acpi_memory_list *cache;
+
+	ACPI_FUNCTION_ENTRY();
+
+	if (!cache_name || !return_cache || (object_size < 16)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Create the cache object */
+
+	cache = acpi_os_allocate(sizeof(struct acpi_memory_list));
+	if (!cache) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* Populate the cache object and return it */
+
+	ACPI_MEMSET(cache, 0, sizeof(struct acpi_memory_list));
+	cache->link_offset = 8;
+	cache->list_name = cache_name;
+	cache->object_size = object_size;
+	cache->max_depth = max_depth;
+
+	*return_cache = cache;
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_purge_cache
+ *
+ * PARAMETERS:  cache           - Handle to cache object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Free all objects within the requested cache.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_purge_cache(struct acpi_memory_list * cache)
+{
+	char *next;
+	acpi_status status;
+
+	ACPI_FUNCTION_ENTRY();
+
+	if (!cache) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* Walk the list of objects in this cache */
+
+	while (cache->list_head) {
+
+		/* Delete and unlink one cached state object */
+
+		next = *(ACPI_CAST_INDIRECT_PTR(char,
+						&(((char *)cache->
+						   list_head)[cache->
+							      link_offset])));
+		ACPI_FREE(cache->list_head);
+
+		cache->list_head = next;
+		cache->current_depth--;
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_delete_cache
+ *
+ * PARAMETERS:  cache           - Handle to cache object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Free all objects within the requested cache and delete the
+ *              cache object.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_delete_cache(struct acpi_memory_list * cache)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Purge all objects in the cache */
+
+	status = acpi_os_purge_cache(cache);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* Now we can delete the cache object */
+
+	acpi_os_free(cache);
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_release_object
+ *
+ * PARAMETERS:  cache       - Handle to cache object
+ *              object      - The object to be released
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Release an object to the specified cache. If cache is full,
+ *              the object is deleted.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_os_release_object(struct acpi_memory_list * cache, void *object)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_ENTRY();
+
+	if (!cache || !object) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* If cache is full, just free this object */
+
+	if (cache->current_depth >= cache->max_depth) {
+		ACPI_FREE(object);
+		ACPI_MEM_TRACKING(cache->total_freed++);
+	}
+
+	/* Otherwise put this object back into the cache */
+
+	else {
+		status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
+		if (ACPI_FAILURE(status)) {
+			return (status);
+		}
+
+		/* Mark the object as cached */
+
+		ACPI_MEMSET(object, 0xCA, cache->object_size);
+		ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_CACHED);
+
+		/* Put the object at the head of the cache list */
+
+		*(ACPI_CAST_INDIRECT_PTR(char,
+					 &(((char *)object)[cache->
+							    link_offset]))) =
+		    cache->list_head;
+		cache->list_head = object;
+		cache->current_depth++;
+
+		(void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_acquire_object
+ *
+ * PARAMETERS:  cache           - Handle to cache object
+ *
+ * RETURN:      the acquired object. NULL on error
+ *
+ * DESCRIPTION: Get an object from the specified cache. If cache is empty,
+ *              the object is allocated.
+ *
+ ******************************************************************************/
+
+void *acpi_os_acquire_object(struct acpi_memory_list *cache)
+{
+	acpi_status status;
+	void *object;
+
+	ACPI_FUNCTION_NAME(os_acquire_object);
+
+	if (!cache) {
+		return (NULL);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
+	if (ACPI_FAILURE(status)) {
+		return (NULL);
+	}
+
+	ACPI_MEM_TRACKING(cache->requests++);
+
+	/* Check the cache first */
+
+	if (cache->list_head) {
+
+		/* There is an object available, use it */
+
+		object = cache->list_head;
+		cache->list_head = *(ACPI_CAST_INDIRECT_PTR(char,
+							    &(((char *)
+							       object)[cache->
+								       link_offset])));
+
+		cache->current_depth--;
+
+		ACPI_MEM_TRACKING(cache->hits++);
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "Object %p from %s cache\n", object,
+				  cache->list_name));
+
+		status = acpi_ut_release_mutex(ACPI_MTX_CACHES);
+		if (ACPI_FAILURE(status)) {
+			return (NULL);
+		}
+
+		/* Clear (zero) the previously used Object */
+
+		ACPI_MEMSET(object, 0, cache->object_size);
+	} else {
+		/* The cache is empty, create a new object */
+
+		ACPI_MEM_TRACKING(cache->total_allocated++);
+
+#ifdef ACPI_DBG_TRACK_ALLOCATIONS
+		if ((cache->total_allocated - cache->total_freed) >
+		    cache->max_occupied) {
+			cache->max_occupied =
+			    cache->total_allocated - cache->total_freed;
+		}
+#endif
+
+		/* Avoid deadlock with ACPI_ALLOCATE_ZEROED */
+
+		status = acpi_ut_release_mutex(ACPI_MTX_CACHES);
+		if (ACPI_FAILURE(status)) {
+			return (NULL);
+		}
+
+		object = ACPI_ALLOCATE_ZEROED(cache->object_size);
+		if (!object) {
+			return (NULL);
+		}
+	}
+
+	return (object);
+}
+#endif				/* ACPI_USE_LOCAL_CACHE */