Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 164 insertions, 2 deletions

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 9ac2a9fa90f..7049a7d27c4 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -40,9 +40,11 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include "sleep.h"
+#include "internal.h"
 
 #define PREFIX "ACPI: "
 
@@ -77,6 +79,20 @@ static struct acpi_driver acpi_power_driver = {
 		},
 };
 
+/*
+ * A power managed device
+ * A device may rely on multiple power resources.
+ * */
+struct acpi_power_managed_device {
+	struct device *dev; /* The physical device */
+	acpi_handle *handle;
+};
+
+struct acpi_power_resource_device {
+	struct acpi_power_managed_device *device;
+	struct acpi_power_resource_device *next;
+};
+
 struct acpi_power_resource {
 	struct acpi_device * device;
 	acpi_bus_id name;
@@ -84,6 +100,9 @@ struct acpi_power_resource {
 	u32 order;
 	unsigned int ref_count;
 	struct mutex resource_lock;
+
+	/* List of devices relying on this power resource */
+	struct acpi_power_resource_device *devices;
 };
 
 static struct list_head acpi_power_resource_list;
@@ -183,8 +202,26 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 	return 0;
 }
 
+/* Resume the device when all power resources in _PR0 are on */
+static void acpi_power_on_device(struct acpi_power_managed_device *device)
+{
+	struct acpi_device *acpi_dev;
+	acpi_handle handle = device->handle;
+	int state;
+
+	if (acpi_bus_get_device(handle, &acpi_dev))
+		return;
+
+	if(acpi_power_get_inferred_state(acpi_dev, &state))
+		return;
+
+	if (state == ACPI_STATE_D0 && pm_runtime_suspended(device->dev))
+		pm_request_resume(device->dev);
+}
+
 static int __acpi_power_on(struct acpi_power_resource *resource)
 {
+	struct acpi_power_resource_device *device_list = resource->devices;
 	acpi_status status = AE_OK;
 
 	status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL);
@@ -197,6 +234,12 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",
 			  resource->name));
 
+	while (device_list) {
+		acpi_power_on_device(device_list->device);
+
+		device_list = device_list->next;
+	}
+
 	return 0;
 }
 
@@ -299,6 +342,125 @@ static int acpi_power_on_list(struct acpi_handle_list *list)
 	return result;
 }
 
+static void __acpi_power_resource_unregister_device(struct device *dev,
+		acpi_handle res_handle)
+{
+	struct acpi_power_resource *resource = NULL;
+	struct acpi_power_resource_device *prev, *curr;
+
+	if (acpi_power_get_context(res_handle, &resource))
+		return;
+
+	mutex_lock(&resource->resource_lock);
+	prev = NULL;
+	curr = resource->devices;
+	while (curr) {
+		if (curr->device->dev == dev) {
+			if (!prev)
+				resource->devices = curr->next;
+			else
+				prev->next = curr->next;
+
+			kfree(curr);
+			break;
+		}
+
+		prev = curr;
+		curr = curr->next;
+	}
+	mutex_unlock(&resource->resource_lock);
+}
+
+/* Unlink dev from all power resources in _PR0 */
+void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle)
+{
+	struct acpi_device *acpi_dev;
+	struct acpi_handle_list *list;
+	int i;
+
+	if (!dev || !handle)
+		return;
+
+	if (acpi_bus_get_device(handle, &acpi_dev))
+		return;
+
+	list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+	for (i = 0; i < list->count; i++)
+		__acpi_power_resource_unregister_device(dev,
+			list->handles[i]);
+}
+
+static int __acpi_power_resource_register_device(
+	struct acpi_power_managed_device *powered_device, acpi_handle handle)
+{
+	struct acpi_power_resource *resource = NULL;
+	struct acpi_power_resource_device *power_resource_device;
+	int result;
+
+	result = acpi_power_get_context(handle, &resource);
+	if (result)
+		return result;
+
+	power_resource_device = kzalloc(
+		sizeof(*power_resource_device), GFP_KERNEL);
+	if (!power_resource_device)
+		return -ENOMEM;
+
+	power_resource_device->device = powered_device;
+
+	mutex_lock(&resource->resource_lock);
+	power_resource_device->next = resource->devices;
+	resource->devices = power_resource_device;
+	mutex_unlock(&resource->resource_lock);
+
+	return 0;
+}
+
+/* Link dev to all power resources in _PR0 */
+int acpi_power_resource_register_device(struct device *dev, acpi_handle handle)
+{
+	struct acpi_device *acpi_dev;
+	struct acpi_handle_list *list;
+	struct acpi_power_managed_device *powered_device;
+	int i, ret;
+
+	if (!dev || !handle)
+		return -ENODEV;
+
+	ret = acpi_bus_get_device(handle, &acpi_dev);
+	if (ret)
+		goto no_power_resource;
+
+	if (!acpi_dev->power.flags.power_resources)
+		goto no_power_resource;
+
+	powered_device = kzalloc(sizeof(*powered_device), GFP_KERNEL);
+	if (!powered_device)
+		return -ENOMEM;
+
+	powered_device->dev = dev;
+	powered_device->handle = handle;
+
+	list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+	for (i = 0; i < list->count; i++) {
+		ret = __acpi_power_resource_register_device(powered_device,
+			list->handles[i]);
+
+		if (ret) {
+			acpi_power_resource_unregister_device(dev, handle);
+			break;
+		}
+	}
+
+	return ret;
+
+no_power_resource:
+	printk(KERN_WARNING PREFIX "Invalid Power Resource to register!");
+	return -ENODEV;
+}
+
 /**
  * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in
  *                          ACPI 3.0) _PSW (Power State Wake)
@@ -500,14 +662,14 @@ int acpi_power_transition(struct acpi_device *device, int state)
 {
 	int result;
 
-	if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
+	if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
 		return -EINVAL;
 
 	if (device->power.state == state)
 		return 0;
 
 	if ((device->power.state < ACPI_STATE_D0)
-	    || (device->power.state > ACPI_STATE_D3))
+	    || (device->power.state > ACPI_STATE_D3_COLD))
 		return -ENODEV;
 
 	/* TBD: Resources must be ordered. */