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-rw-r--r--drivers/base/Kconfig2
-rw-r--r--drivers/base/base.h2
-rw-r--r--drivers/base/bus.c139
-rw-r--r--drivers/base/class.c43
-rw-r--r--drivers/base/core.c261
-rw-r--r--drivers/base/cpu.c28
-rw-r--r--drivers/base/dd.c147
-rw-r--r--drivers/base/dmapool.c3
-rw-r--r--drivers/base/driver.c17
-rw-r--r--drivers/base/firmware_class.c14
-rw-r--r--drivers/base/hypervisor.c3
-rw-r--r--drivers/base/memory.c4
-rw-r--r--drivers/base/node.c135
-rw-r--r--drivers/base/platform.c30
-rw-r--r--drivers/base/power/Makefile1
-rw-r--r--drivers/base/power/main.c1
-rw-r--r--drivers/base/power/resume.c45
-rw-r--r--drivers/base/power/shutdown.c1
-rw-r--r--drivers/base/power/suspend.c99
-rw-r--r--drivers/base/power/sysfs.c35
-rw-r--r--drivers/base/power/trace.c228
-rw-r--r--drivers/base/sys.c1
-rw-r--r--drivers/base/topology.c6
23 files changed, 960 insertions, 285 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 80502dc6ed6..0b4e2243693 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -20,7 +20,7 @@ config PREVENT_FIRMWARE_BUILD
config FW_LOADER
tristate "Userspace firmware loading support"
- select HOTPLUG
+ depends on HOTPLUG
---help---
This option is provided for the case where no in-kernel-tree modules
require userspace firmware loading support, but a module built outside
diff --git a/drivers/base/base.h b/drivers/base/base.h
index c3b8dc98b8a..d26644a5953 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -16,7 +16,7 @@ extern int cpu_dev_init(void);
extern int attribute_container_init(void);
extern int bus_add_device(struct device * dev);
-extern void bus_attach_device(struct device * dev);
+extern int bus_attach_device(struct device * dev);
extern void bus_remove_device(struct device * dev);
extern struct bus_type *get_bus(struct bus_type * bus);
extern void put_bus(struct bus_type * bus);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 050d86d0b87..12173d16bea 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -8,7 +8,6 @@
*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
@@ -130,7 +129,7 @@ static struct kobj_type ktype_bus = {
};
-decl_subsys(bus, &ktype_bus, NULL);
+static decl_subsys(bus, &ktype_bus, NULL);
#ifdef CONFIG_HOTPLUG
@@ -372,12 +371,20 @@ int bus_add_device(struct device * dev)
if (bus) {
pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
error = device_add_attrs(bus, dev);
- if (!error) {
- sysfs_create_link(&bus->devices.kobj, &dev->kobj, dev->bus_id);
- sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "subsystem");
- sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "bus");
- }
+ if (error)
+ goto out;
+ error = sysfs_create_link(&bus->devices.kobj,
+ &dev->kobj, dev->bus_id);
+ if (error)
+ goto out;
+ error = sysfs_create_link(&dev->kobj,
+ &dev->bus->subsys.kset.kobj, "subsystem");
+ if (error)
+ goto out;
+ error = sysfs_create_link(&dev->kobj,
+ &dev->bus->subsys.kset.kobj, "bus");
}
+out:
return error;
}
@@ -385,16 +392,24 @@ int bus_add_device(struct device * dev)
* bus_attach_device - add device to bus
* @dev: device tried to attach to a driver
*
+ * - Add device to bus's list of devices.
* - Try to attach to driver.
*/
-void bus_attach_device(struct device * dev)
+int bus_attach_device(struct device * dev)
{
- struct bus_type * bus = dev->bus;
+ struct bus_type *bus = dev->bus;
+ int ret = 0;
if (bus) {
- device_attach(dev);
- klist_add_tail(&dev->knode_bus, &bus->klist_devices);
+ dev->is_registered = 1;
+ ret = device_attach(dev);
+ if (ret >= 0) {
+ klist_add_tail(&dev->knode_bus, &bus->klist_devices);
+ ret = 0;
+ } else
+ dev->is_registered = 0;
}
+ return ret;
}
/**
@@ -413,7 +428,8 @@ void bus_remove_device(struct device * dev)
sysfs_remove_link(&dev->kobj, "bus");
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);
- klist_remove(&dev->knode_bus);
+ dev->is_registered = 0;
+ klist_del(&dev->knode_bus);
pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
device_release_driver(dev);
put_bus(dev->bus);
@@ -456,10 +472,17 @@ static void driver_remove_attrs(struct bus_type * bus, struct device_driver * dr
* Thanks to drivers making their tables __devinit, we can't allow manual
* bind and unbind from userspace unless CONFIG_HOTPLUG is enabled.
*/
-static void add_bind_files(struct device_driver *drv)
+static int __must_check add_bind_files(struct device_driver *drv)
{
- driver_create_file(drv, &driver_attr_unbind);
- driver_create_file(drv, &driver_attr_bind);
+ int ret;
+
+ ret = driver_create_file(drv, &driver_attr_unbind);
+ if (ret == 0) {
+ ret = driver_create_file(drv, &driver_attr_bind);
+ if (ret)
+ driver_remove_file(drv, &driver_attr_unbind);
+ }
+ return ret;
}
static void remove_bind_files(struct device_driver *drv)
@@ -468,7 +491,7 @@ static void remove_bind_files(struct device_driver *drv)
driver_remove_file(drv, &driver_attr_unbind);
}
#else
-static inline void add_bind_files(struct device_driver *drv) {}
+static inline int add_bind_files(struct device_driver *drv) { return 0; }
static inline void remove_bind_files(struct device_driver *drv) {}
#endif
@@ -477,7 +500,7 @@ static inline void remove_bind_files(struct device_driver *drv) {}
* @drv: driver.
*
*/
-int bus_add_driver(struct device_driver * drv)
+int bus_add_driver(struct device_driver *drv)
{
struct bus_type * bus = get_bus(drv->bus);
int error = 0;
@@ -485,27 +508,39 @@ int bus_add_driver(struct device_driver * drv)
if (bus) {
pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
error = kobject_set_name(&drv->kobj, "%s", drv->name);
- if (error) {
- put_bus(bus);
- return error;
- }
+ if (error)
+ goto out_put_bus;
drv->kobj.kset = &bus->drivers;
- if ((error = kobject_register(&drv->kobj))) {
- put_bus(bus);
- return error;
- }
+ if ((error = kobject_register(&drv->kobj)))
+ goto out_put_bus;
- driver_attach(drv);
+ error = driver_attach(drv);
+ if (error)
+ goto out_unregister;
klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
module_add_driver(drv->owner, drv);
- driver_add_attrs(bus, drv);
- add_bind_files(drv);
+ error = driver_add_attrs(bus, drv);
+ if (error) {
+ /* How the hell do we get out of this pickle? Give up */
+ printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
+ __FUNCTION__, drv->name);
+ }
+ error = add_bind_files(drv);
+ if (error) {
+ /* Ditto */
+ printk(KERN_ERR "%s: add_bind_files(%s) failed\n",
+ __FUNCTION__, drv->name);
+ }
}
return error;
+out_unregister:
+ kobject_unregister(&drv->kobj);
+out_put_bus:
+ put_bus(bus);
+ return error;
}
-
/**
* bus_remove_driver - delete driver from bus's knowledge.
* @drv: driver.
@@ -531,16 +566,21 @@ void bus_remove_driver(struct device_driver * drv)
/* Helper for bus_rescan_devices's iter */
-static int bus_rescan_devices_helper(struct device *dev, void *data)
+static int __must_check bus_rescan_devices_helper(struct device *dev,
+ void *data)
{
+ int ret = 0;
+
if (!dev->driver) {
if (dev->parent) /* Needed for USB */
down(&dev->parent->sem);
- device_attach(dev);
+ ret = device_attach(dev);
if (dev->parent)
up(&dev->parent->sem);
+ if (ret > 0)
+ ret = 0;
}
- return 0;
+ return ret < 0 ? ret : 0;
}
/**
@@ -551,9 +591,9 @@ static int bus_rescan_devices_helper(struct device *dev, void *data)
* attached and rescan it against existing drivers to see if it matches
* any by calling device_attach() for the unbound devices.
*/
-void bus_rescan_devices(struct bus_type * bus)
+int bus_rescan_devices(struct bus_type * bus)
{
- bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
+ return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
}
/**
@@ -565,7 +605,7 @@ void bus_rescan_devices(struct bus_type * bus)
* to use if probing criteria changed during a devices lifetime and
* driver attachment should change accordingly.
*/
-void device_reprobe(struct device *dev)
+int device_reprobe(struct device *dev)
{
if (dev->driver) {
if (dev->parent) /* Needed for USB */
@@ -574,14 +614,14 @@ void device_reprobe(struct device *dev)
if (dev->parent)
up(&dev->parent->sem);
}
-
- bus_rescan_devices_helper(dev, NULL);
+ return bus_rescan_devices_helper(dev, NULL);
}
EXPORT_SYMBOL_GPL(device_reprobe);
-struct bus_type * get_bus(struct bus_type * bus)
+struct bus_type *get_bus(struct bus_type *bus)
{
- return bus ? container_of(subsys_get(&bus->subsys), struct bus_type, subsys) : NULL;
+ return bus ? container_of(subsys_get(&bus->subsys),
+ struct bus_type, subsys) : NULL;
}
void put_bus(struct bus_type * bus)
@@ -599,12 +639,13 @@ void put_bus(struct bus_type * bus)
*
* Note that kset_find_obj increments bus' reference count.
*/
-
+#if 0
struct bus_type * find_bus(char * name)
{
struct kobject * k = kset_find_obj(&bus_subsys.kset, name);
return k ? to_bus(k) : NULL;
}
+#endif /* 0 */
/**
@@ -655,22 +696,6 @@ static void klist_devices_put(struct klist_node *n)
put_device(dev);
}
-static void klist_drivers_get(struct klist_node *n)
-{
- struct device_driver *drv = container_of(n, struct device_driver,
- knode_bus);
-
- get_driver(drv);
-}
-
-static void klist_drivers_put(struct klist_node *n)
-{
- struct device_driver *drv = container_of(n, struct device_driver,
- knode_bus);
-
- put_driver(drv);
-}
-
/**
* bus_register - register a bus with the system.
* @bus: bus.
@@ -706,7 +731,7 @@ int bus_register(struct bus_type * bus)
goto bus_drivers_fail;
klist_init(&bus->klist_devices, klist_devices_get, klist_devices_put);
- klist_init(&bus->klist_drivers, klist_drivers_get, klist_drivers_put);
+ klist_init(&bus->klist_drivers, NULL, NULL);
bus_add_attrs(bus);
pr_debug("bus type '%s' registered\n", bus->name);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 9aa12746026..b32b77ff2dc 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -10,7 +10,6 @@
*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -20,6 +19,8 @@
#include <linux/slab.h>
#include "base.h"
+extern struct subsystem devices_subsys;
+
#define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
#define to_class(obj) container_of(obj, struct class, subsys.kset.kobj)
@@ -198,7 +199,7 @@ static int class_device_create_uevent(struct class_device *class_dev,
* Note, the pointer created here is to be destroyed when finished by
* making a call to class_destroy().
*/
-struct class *class_create(struct module *owner, char *name)
+struct class *class_create(struct module *owner, const char *name)
{
struct class *cls;
int retval;
@@ -227,7 +228,7 @@ error:
/**
* class_destroy - destroys a struct class structure
- * @cs: pointer to the struct class that is to be destroyed
+ * @cls: pointer to the struct class that is to be destroyed
*
* Note, the pointer to be destroyed must have been created with a call
* to class_create().
@@ -362,7 +363,7 @@ static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,
pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);
if (class_dev->dev) {
- /* add physical device, backing this device */
+ /* add device, backing this class device (deprecated) */
struct device *dev = class_dev->dev;
char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
@@ -657,9 +658,9 @@ int class_device_register(struct class_device *class_dev)
/**
* class_device_create - creates a class device and registers it with sysfs
- * @cs: pointer to the struct class that this device should be registered to.
+ * @cls: pointer to the struct class that this device should be registered to.
* @parent: pointer to the parent struct class_device of this new device, if any.
- * @dev: the dev_t for the char device to be added.
+ * @devt: the dev_t for the char device to be added.
* @device: a pointer to a struct device that is assiociated with this class device.
* @fmt: string for the class device's name
*
@@ -680,7 +681,8 @@ int class_device_register(struct class_device *class_dev)
struct class_device *class_device_create(struct class *cls,
struct class_device *parent,
dev_t devt,
- struct device *device, char *fmt, ...)
+ struct device *device,
+ const char *fmt, ...)
{
va_list args;
struct class_device *class_dev = NULL;
@@ -764,7 +766,7 @@ void class_device_unregister(struct class_device *class_dev)
/**
* class_device_destroy - removes a class device that was created with class_device_create()
* @cls: the pointer to the struct class that this device was registered * with.
- * @dev: the dev_t of the device that was previously registered.
+ * @devt: the dev_t of the device that was previously registered.
*
* This call unregisters and cleans up a class device that was created with a
* call to class_device_create()
@@ -840,6 +842,7 @@ int class_interface_register(struct class_interface *class_intf)
{
struct class *parent;
struct class_device *class_dev;
+ struct device *dev;
if (!class_intf || !class_intf->class)
return -ENODEV;
@@ -854,6 +857,10 @@ int class_interface_register(struct class_interface *class_intf)
list_for_each_entry(class_dev, &parent->children, node)
class_intf->add(class_dev, class_intf);
}
+ if (class_intf->add_dev) {
+ list_for_each_entry(dev, &parent->devices, node)
+ class_intf->add_dev(dev, class_intf);
+ }
up(&parent->sem);
return 0;
@@ -863,6 +870,7 @@ void class_interface_unregister(struct class_interface *class_intf)
{
struct class * parent = class_intf->class;
struct class_device *class_dev;
+ struct device *dev;
if (!parent)
return;
@@ -873,12 +881,31 @@ void class_interface_unregister(struct class_interface *class_intf)
list_for_each_entry(class_dev, &parent->children, node)
class_intf->remove(class_dev, class_intf);
}
+ if (class_intf->remove_dev) {
+ list_for_each_entry(dev, &parent->devices, node)
+ class_intf->remove_dev(dev, class_intf);
+ }
up(&parent->sem);
class_put(parent);
}
+int virtual_device_parent(struct device *dev)
+{
+ if (!dev->class)
+ return -ENODEV;
+
+ if (!dev->class->virtual_dir) {
+ static struct kobject *virtual_dir = NULL;
+
+ if (!virtual_dir)
+ virtual_dir = kobject_add_dir(&devices_subsys.kset.kobj, "virtual");
+ dev->class->virtual_dir = kobject_add_dir(virtual_dir, dev->class->name);
+ }
+ dev->kobj.parent = dev->class->virtual_dir;
+ return 0;
+}
int __init classes_init(void)
{
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 27c2176895d..b224bb43ff6 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3,12 +3,13 @@
*
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2006 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2006 Novell, Inc.
*
* This file is released under the GPLv2
*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
@@ -93,6 +94,8 @@ static void device_release(struct kobject * kobj)
if (dev->release)
dev->release(dev);
+ else if (dev->class && dev->class->dev_release)
+ dev->class->dev_release(dev);
else {
printk(KERN_ERR "Device '%s' does not have a release() function, "
"it is broken and must be fixed.\n",
@@ -150,17 +153,21 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
"MINOR=%u", MINOR(dev->devt));
}
- /* add bus name of physical device */
+ /* add bus name (same as SUBSYSTEM, deprecated) */
if (dev->bus)
add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"PHYSDEVBUS=%s", dev->bus->name);
- /* add driver name of physical device */
- if (dev->driver)
+ /* add driver name (PHYSDEV* values are deprecated)*/
+ if (dev->driver) {
+ add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "DRIVER=%s", dev->driver->name);
add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"PHYSDEVDRIVER=%s", dev->driver->name);
+ }
/* terminate, set to next free slot, shrink available space */
envp[i] = NULL;
@@ -178,6 +185,15 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
}
}
+ if (dev->class && dev->class->dev_uevent) {
+ /* have the class specific function add its stuff */
+ retval = dev->class->dev_uevent(dev, envp, num_envp, buffer, buffer_size);
+ if (retval) {
+ pr_debug("%s - dev_uevent() returned %d\n",
+ __FUNCTION__, retval);
+ }
+ }
+
return retval;
}
@@ -194,6 +210,72 @@ static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
return count;
}
+static int device_add_groups(struct device *dev)
+{
+ int i;
+ int error = 0;
+
+ if (dev->groups) {
+ for (i = 0; dev->groups[i]; i++) {
+ error = sysfs_create_group(&dev->kobj, dev->groups[i]);
+ if (error) {
+ while (--i >= 0)
+ sysfs_remove_group(&dev->kobj, dev->groups[i]);
+ goto out;
+ }
+ }
+ }
+out:
+ return error;
+}
+
+static void device_remove_groups(struct device *dev)
+{
+ int i;
+ if (dev->groups) {
+ for (i = 0; dev->groups[i]; i++) {
+ sysfs_remove_group(&dev->kobj, dev->groups[i]);
+ }
+ }
+}
+
+static int device_add_attrs(struct device *dev)
+{
+ struct class *class = dev->class;
+ int error = 0;
+ int i;
+
+ if (!class)
+ return 0;
+
+ if (class->dev_attrs) {
+ for (i = 0; attr_name(class->dev_attrs[i]); i++) {
+ error = device_create_file(dev, &class->dev_attrs[i]);
+ if (error)
+ break;
+ }
+ }
+ if (error)
+ while (--i >= 0)
+ device_remove_file(dev, &class->dev_attrs[i]);
+ return error;
+}
+
+static void device_remove_attrs(struct device *dev)
+{
+ struct class *class = dev->class;
+ int i;
+
+ if (!class)
+ return;
+
+ if (class->dev_attrs) {
+ for (i = 0; attr_name(class->dev_attrs[i]); i++)
+ device_remove_file(dev, &class->dev_attrs[i]);
+ }
+}
+
+
static ssize_t show_dev(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -237,6 +319,32 @@ void device_remove_file(struct device * dev, struct device_attribute * attr)
}
}
+/**
+ * device_create_bin_file - create sysfs binary attribute file for device.
+ * @dev: device.
+ * @attr: device binary attribute descriptor.
+ */
+int device_create_bin_file(struct device *dev, struct bin_attribute *attr)
+{
+ int error = -EINVAL;
+ if (dev)
+ error = sysfs_create_bin_file(&dev->kobj, attr);
+ return error;
+}
+EXPORT_SYMBOL_GPL(device_create_bin_file);
+
+/**
+ * device_remove_bin_file - remove sysfs binary attribute file
+ * @dev: device.
+ * @attr: device binary attribute descriptor.
+ */
+void device_remove_bin_file(struct device *dev, struct bin_attribute *attr)
+{
+ if (dev)
+ sysfs_remove_bin_file(&dev->kobj, attr);
+}
+EXPORT_SYMBOL_GPL(device_remove_bin_file);
+
static void klist_children_get(struct klist_node *n)
{
struct device *dev = container_of(n, struct device, knode_parent);
@@ -290,12 +398,20 @@ int device_add(struct device *dev)
{
struct device *parent = NULL;
char *class_name = NULL;
+ struct class_interface *class_intf;
int error = -EINVAL;
dev = get_device(dev);
if (!dev || !strlen(dev->bus_id))
goto Error;
+ /* if this is a class device, and has no parent, create one */
+ if ((dev->class) && (dev->parent == NULL)) {
+ error = virtual_device_parent(dev);
+ if (error)
+ goto Error;
+ }
+
parent = get_device(dev->parent);
pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id);
@@ -308,6 +424,10 @@ int device_add(struct device *dev)
if ((error = kobject_add(&dev->kobj)))
goto Error;
+ /* notify platform of device entry */
+ if (platform_notify)
+ platform_notify(dev);
+
dev->uevent_attr.attr.name = "uevent";
dev->uevent_attr.attr.mode = S_IWUSR;
if (dev->driver)
@@ -341,12 +461,17 @@ int device_add(struct device *dev)
"subsystem");
sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
dev->bus_id);
-
- sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
- class_name = make_class_name(dev->class->name, &dev->kobj);
- sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
+ if (parent) {
+ sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
+ class_name = make_class_name(dev->class->name, &dev->kobj);
+ sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
+ }
}
+ if ((error = device_add_attrs(dev)))
+ goto AttrsError;
+ if ((error = device_add_groups(dev)))
+ goto GroupError;
if ((error = device_pm_add(dev)))
goto PMError;
if ((error = bus_add_device(dev)))
@@ -357,15 +482,16 @@ int device_add(struct device *dev)
klist_add_tail(&dev->knode_parent, &parent->klist_children);
if (dev->class) {
- /* tie the class to the device */
down(&dev->class->sem);
+ /* tie the class to the device */
list_add_tail(&dev->node, &dev->class->devices);
+
+ /* notify any interfaces that the device is here */
+ list_for_each_entry(class_intf, &dev->class->interfaces, node)
+ if (class_intf->add_dev)
+ class_intf->add_dev(dev, class_intf);
up(&dev->class->sem);
}
-
- /* notify platform of device entry */
- if (platform_notify)
- platform_notify(dev);
Done:
kfree(class_name);
put_device(dev);
@@ -373,6 +499,10 @@ int device_add(struct device *dev)
BusError:
device_pm_remove(dev);
PMError:
+ device_remove_groups(dev);
+ GroupError:
+ device_remove_attrs(dev);
+ AttrsError:
if (dev->devt_attr) {
device_remove_file(dev, dev->devt_attr);
kfree(dev->devt_attr);
@@ -450,6 +580,7 @@ void device_del(struct device * dev)
{
struct device * parent = dev->parent;
char *class_name = NULL;
+ struct class_interface *class_intf;
if (parent)
klist_del(&dev->knode_parent);
@@ -459,14 +590,23 @@ void device_del(struct device * dev)
sysfs_remove_link(&dev->kobj, "subsystem");
sysfs_remove_link(&dev->class->subsys.kset.kobj, dev->bus_id);
class_name = make_class_name(dev->class->name, &dev->kobj);
- sysfs_remove_link(&dev->kobj, "device");
- sysfs_remove_link(&dev->parent->kobj, class_name);
+ if (parent) {
+ sysfs_remove_link(&dev->kobj, "device");
+ sysfs_remove_link(&dev->parent->kobj, class_name);
+ }
kfree(class_name);
down(&dev->class->sem);
+ /* notify any interfaces that the device is now gone */
+ list_for_each_entry(class_intf, &dev->class->interfaces, node)
+ if (class_intf->remove_dev)
+ class_intf->remove_dev(dev, class_intf);
+ /* remove the device from the class list */
list_del_init(&dev->node);
up(&dev->class->sem);
}
device_remove_file(dev, &dev->uevent_attr);
+ device_remove_groups(dev);
+ device_remove_attrs(dev);
/* Notify the platform of the removal, in case they
* need to do anything...
@@ -560,27 +700,27 @@ static void device_create_release(struct device *dev)
/**
* device_create - creates a device and registers it with sysfs
- * @cs: pointer to the struct class that this device should be registered to.
- * @parent: pointer to the parent struct device of this new device, if any.
- * @dev: the dev_t for the char device to be added.
- * @fmt: string for the class device's name
+ * @class: pointer to the struct class that this device should be registered to
+ * @parent: pointer to the parent struct device of this new device, if any
+ * @devt: the dev_t for the char device to be added
+ * @fmt: string for the device's name
+ *
+ * This function can be used by char device classes. A struct device
+ * will be created in sysfs, registered to the specified class.
*
- * This function can be used by char device classes. A struct
- * device will be created in sysfs, registered to the specified
- * class.
* A "dev" file will be created, showing the dev_t for the device, if
* the dev_t is not 0,0.
- * If a pointer to a parent struct device is passed in, the newly
- * created struct device will be a child of that device in sysfs. The
- * pointer to the struct device will be returned from the call. Any
- * further sysfs files that might be required can be created using this
+ * If a pointer to a parent struct device is passed in, the newly created
+ * struct device will be a child of that device in sysfs.
+ * The pointer to the struct device will be returned from the call.
+ * Any further sysfs files that might be required can be created using this
* pointer.
*
* Note: the struct class passed to this function must have previously
* been created with a call to class_create().
*/
struct device *device_create(struct class *class, struct device *parent,
- dev_t devt, char *fmt, ...)
+ dev_t devt, const char *fmt, ...)
{
va_list args;
struct device *dev = NULL;
@@ -588,10 +728,6 @@ struct device *device_create(struct class *class, struct device *parent,
if (class == NULL || IS_ERR(class))
goto error;
- if (parent == NULL) {
- printk(KERN_WARNING "%s does not work yet for NULL parents\n", __FUNCTION__);
- goto error;
- }
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
@@ -621,11 +757,11 @@ EXPORT_SYMBOL_GPL(device_create);
/**
* device_destroy - removes a device that was created with device_create()
- * @class: the pointer to the struct class that this device was registered * with.
- * @dev: the dev_t of the device that was previously registered.
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
*
- * This call unregisters and cleans up a class device that was created with a
- * call to class_device_create()
+ * This call unregisters and cleans up a device that was created with a
+ * call to device_create().
*/
void device_destroy(struct class *class, dev_t devt)
{
@@ -645,3 +781,58 @@ void device_destroy(struct class *class, dev_t devt)
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(device_destroy);
+
+/**
+ * device_rename - renames a device
+ * @dev: the pointer to the struct device to be renamed
+ * @new_name: the new name of the device
+ */
+int device_rename(struct device *dev, char *new_name)
+{
+ char *old_class_name = NULL;
+ char *new_class_name = NULL;
+ char *old_symlink_name = NULL;
+ int error;
+
+ dev = get_device(dev);
+ if (!dev)
+ return -EINVAL;
+
+ pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
+
+ if ((dev->class) && (dev->parent))
+ old_class_name = make_class_name(dev->class->name, &dev->kobj);
+
+ if (dev->class) {
+ old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
+ if (!old_symlink_name)
+ return -ENOMEM;
+ strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
+ }
+
+ strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
+
+ error = kobject_rename(&dev->kobj, new_name);
+
+ if (old_class_name) {
+ new_class_name = make_class_name(dev->class->name, &dev->kobj);
+ if (new_class_name) {
+ sysfs_create_link(&dev->parent->kobj, &dev->kobj,
+ new_class_name);
+ sysfs_remove_link(&dev->parent->kobj, old_class_name);
+ }
+ }
+ if (dev->class) {
+ sysfs_remove_link(&dev->class->subsys.kset.kobj,
+ old_symlink_name);
+ sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
+ dev->bus_id);
+ }
+ put_device(dev);
+
+ kfree(old_class_name);
+ kfree(new_class_name);
+ kfree(old_symlink_name);
+
+ return error;
+}
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index dd712b24ec9..4bef76a2f3f 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -8,6 +8,7 @@
#include <linux/cpu.h>
#include <linux/topology.h>
#include <linux/device.h>
+#include <linux/node.h>
#include "base.h"
@@ -57,13 +58,12 @@ static void __devinit register_cpu_control(struct cpu *cpu)
{
sysdev_create_file(&cpu->sysdev, &attr_online);
}
-void unregister_cpu(struct cpu *cpu, struct node *root)
+void unregister_cpu(struct cpu *cpu)
{
int logical_cpu = cpu->sysdev.id;
- if (root)
- sysfs_remove_link(&root->sysdev.kobj,
- kobject_name(&cpu->sysdev.kobj));
+ unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu));
+
sysdev_remove_file(&cpu->sysdev, &attr_online);
sysdev_unregister(&cpu->sysdev);
@@ -109,23 +109,21 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
*
* Initialize and register the CPU device.
*/
-int __devinit register_cpu(struct cpu *cpu, int num, struct node *root)
+int __devinit register_cpu(struct cpu *cpu, int num)
{
int error;
-
cpu->node_id = cpu_to_node(num);
cpu->sysdev.id = num;
cpu->sysdev.cls = &cpu_sysdev_class;
error = sysdev_register(&cpu->sysdev);
- if (!error && root)
- error = sysfs_create_link(&root->sysdev.kobj,
- &cpu->sysdev.kobj,
- kobject_name(&cpu->sysdev.kobj));
+
if (!error && !cpu->no_control)
register_cpu_control(cpu);
if (!error)
cpu_sys_devices[num] = &cpu->sysdev;
+ if (!error)
+ register_cpu_under_node(num, cpu_to_node(num));
#ifdef CONFIG_KEXEC
if (!error)
@@ -145,5 +143,13 @@ EXPORT_SYMBOL_GPL(get_cpu_sysdev);
int __init cpu_dev_init(void)
{
- return sysdev_class_register(&cpu_sysdev_class);
+ int err;
+
+ err = sysdev_class_register(&cpu_sysdev_class);
+#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
+ if (!err)
+ err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
+#endif
+
+ return err;
}
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 889c7111123..b5f43c3e44f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -17,6 +17,7 @@
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/kthread.h>
#include "base.h"
#include "power/power.h"
@@ -38,66 +39,73 @@
*
* This function must be called with @dev->sem held.
*/
-void device_bind_driver(struct device * dev)
+int device_bind_driver(struct device *dev)
{
- if (klist_node_attached(&dev->knode_driver))
- return;
+ int ret;
+
+ if (klist_node_attached(&dev->knode_driver)) {
+ printk(KERN_WARNING "%s: device %s already bound\n",
+ __FUNCTION__, kobject_name(&dev->kobj));
+ return 0;
+ }
pr_debug("bound device '%s' to driver '%s'\n",
dev->bus_id, dev->driver->name);
klist_add_tail(&dev->knode_driver, &dev->driver->klist_devices);
- sysfs_create_link(&dev->driver->kobj, &dev->kobj,
+ ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj,
kobject_name(&dev->kobj));
- sysfs_create_link(&dev->kobj, &dev->driver->kobj, "driver");
+ if (ret == 0) {
+ ret = sysfs_create_link(&dev->kobj, &dev->driver->kobj,
+ "driver");
+ if (ret)
+ sysfs_remove_link(&dev->driver->kobj,
+ kobject_name(&dev->kobj));
+ }
+ return ret;
}
-/**
- * driver_probe_device - attempt to bind device & driver.
- * @drv: driver.
- * @dev: device.
- *
- * First, we call the bus's match function, if one present, which
- * should compare the device IDs the driver supports with the
- * device IDs of the device. Note we don't do this ourselves
- * because we don't know the format of the ID structures, nor what
- * is to be considered a match and what is not.
- *
- * This function returns 1 if a match is found, an error if one
- * occurs (that is not -ENODEV or -ENXIO), and 0 otherwise.
- *
- * This function must be called with @dev->sem held. When called
- * for a USB interface, @dev->parent->sem must be held as well.
- */
-int driver_probe_device(struct device_driver * drv, struct device * dev)
+struct stupid_thread_structure {
+ struct device_driver *drv;
+ struct device *dev;
+};
+
+static atomic_t probe_count = ATOMIC_INIT(0);
+static int really_probe(void *void_data)
{
+ struct stupid_thread_structure *data = void_data;
+ struct device_driver *drv = data->drv;
+ struct device *dev = data->dev;
int ret = 0;
- if (drv->bus->match && !drv->bus->match(dev, drv))
- goto Done;
+ atomic_inc(&probe_count);
+ pr_debug("%s: Probing driver %s with device %s\n",
+ drv->bus->name, drv->name, dev->bus_id);
- pr_debug("%s: Matched Device %s with Driver %s\n",
- drv->bus->name, dev->bus_id, drv->name);
dev->driver = drv;
if (dev->bus->probe) {
ret = dev->bus->probe(dev);
if (ret) {
dev->driver = NULL;
- goto ProbeFailed;
+ goto probe_failed;
}
} else if (drv->probe) {
ret = drv->probe(dev);
if (ret) {
dev->driver = NULL;
- goto ProbeFailed;
+ goto probe_failed;
}
}
- device_bind_driver(dev);
+ if (device_bind_driver(dev)) {
+ printk(KERN_ERR "%s: device_bind_driver(%s) failed\n",
+ __FUNCTION__, dev->bus_id);
+ /* How does undo a ->probe? We're screwed. */
+ }
ret = 1;
pr_debug("%s: Bound Device %s to Driver %s\n",
drv->bus->name, dev->bus_id, drv->name);
- goto Done;
+ goto done;
- ProbeFailed:
+probe_failed:
if (ret == -ENODEV || ret == -ENXIO) {
/* Driver matched, but didn't support device
* or device not found.
@@ -110,7 +118,71 @@ int driver_probe_device(struct device_driver * drv, struct device * dev)
"%s: probe of %s failed with error %d\n",
drv->name, dev->bus_id, ret);
}
- Done:
+done:
+ kfree(data);
+ atomic_dec(&probe_count);
+ return ret;
+}
+
+/**
+ * driver_probe_done
+ * Determine if the probe sequence is finished or not.
+ *
+ * Should somehow figure out how to use a semaphore, not an atomic variable...
+ */
+int driver_probe_done(void)
+{
+ pr_debug("%s: probe_count = %d\n", __FUNCTION__,
+ atomic_read(&probe_count));
+ if (atomic_read(&probe_count))
+ return -EBUSY;
+ return 0;
+}
+
+/**
+ * driver_probe_device - attempt to bind device & driver together
+ * @drv: driver to bind a device to
+ * @dev: device to try to bind to the driver
+ *
+ * First, we call the bus's match function, if one present, which should
+ * compare the device IDs the driver supports with the device IDs of the
+ * device. Note we don't do this ourselves because we don't know the
+ * format of the ID structures, nor what is to be considered a match and
+ * what is not.
+ *
+ * This function returns 1 if a match is found, an error if one occurs
+ * (that is not -ENODEV or -ENXIO), and 0 otherwise.
+ *
+ * This function must be called with @dev->sem held. When called for a
+ * USB interface, @dev->parent->sem must be held as well.
+ */
+int driver_probe_device(struct device_driver * drv, struct device * dev)
+{
+ struct stupid_thread_structure *data;
+ struct task_struct *probe_task;
+ int ret = 0;
+
+ if (!device_is_registered(dev))
+ return -ENODEV;
+ if (drv->bus->match && !drv->bus->match(dev, drv))
+ goto done;
+
+ pr_debug("%s: Matched Device %s with Driver %s\n",
+ drv->bus->name, dev->bus_id, drv->name);
+
+ data = kmalloc(sizeof(*data), GFP_KERNEL);
+ data->drv = drv;
+ data->dev = dev;
+
+ if (drv->multithread_probe) {
+ probe_task = kthread_run(really_probe, data,
+ "probe-%s", dev->bus_id);
+ if (IS_ERR(probe_task))
+ ret = PTR_ERR(probe_task);
+ } else
+ ret = really_probe(data);
+
+done:
return ret;
}
@@ -139,8 +211,9 @@ int device_attach(struct device * dev)
down(&dev->sem);
if (dev->driver) {
- device_bind_driver(dev);
- ret = 1;
+ ret = device_bind_driver(dev);
+ if (ret == 0)
+ ret = 1;
} else
ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
up(&dev->sem);
@@ -182,9 +255,9 @@ static int __driver_attach(struct device * dev, void * data)
* returns 0 and the @dev->driver is set, we've found a
* compatible pair.
*/
-void driver_attach(struct device_driver * drv)
+int driver_attach(struct device_driver * drv)
{
- bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);
+ return bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);
}
/**
diff --git a/drivers/base/dmapool.c b/drivers/base/dmapool.c
index e2f64f91ed0..33c5cce1560 100644
--- a/drivers/base/dmapool.c
+++ b/drivers/base/dmapool.c
@@ -7,6 +7,7 @@
#include <linux/dmapool.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/poison.h>
/*
* Pool allocator ... wraps the dma_alloc_coherent page allocator, so
@@ -35,8 +36,6 @@ struct dma_page { /* cacheable header for 'allocation' bytes */
};
#define POOL_TIMEOUT_JIFFIES ((100 /* msec */ * HZ) / 1000)
-#define POOL_POISON_FREED 0xa7 /* !inuse */
-#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
static DECLARE_MUTEX (pools_lock);
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index b400314e1c6..1214cbd17d8 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -8,7 +8,6 @@
*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
@@ -143,20 +142,6 @@ void put_driver(struct device_driver * drv)
kobject_put(&drv->kobj);
}
-static void klist_devices_get(struct klist_node *n)
-{
- struct device *dev = container_of(n, struct device, knode_driver);
-
- get_device(dev);
-}
-
-static void klist_devices_put(struct klist_node *n)
-{
- struct device *dev = container_of(n, struct device, knode_driver);
-
- put_device(dev);
-}
-
/**
* driver_register - register driver with bus
* @drv: driver to register
@@ -176,7 +161,7 @@ int driver_register(struct device_driver * drv)
(drv->bus->shutdown && drv->shutdown)) {
printk(KERN_WARNING "Driver '%s' needs updating - please use bus_type methods\n", drv->name);
}
- klist_init(&drv->klist_devices, klist_devices_get, klist_devices_put);
+ klist_init(&drv->klist_devices, NULL, NULL);
init_completion(&drv->unloaded);
return bus_add_driver(drv);
}
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 5d6c011183f..14615694ae9 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -16,6 +16,7 @@
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
+#include <linux/kthread.h>
#include <linux/firmware.h>
#include "base.h"
@@ -511,7 +512,6 @@ request_firmware_work_func(void *arg)
WARN_ON(1);
return 0;
}
- daemonize("%s/%s", "firmware", fw_work->name);
ret = _request_firmware(&fw, fw_work->name, fw_work->device,
fw_work->uevent);
if (ret < 0)
@@ -546,9 +546,9 @@ request_firmware_nowait(
const char *name, struct device *device, void *context,
void (*cont)(const struct firmware *fw, void *context))
{
+ struct task_struct *task;
struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work),
GFP_ATOMIC);
- int ret;
if (!fw_work)
return -ENOMEM;
@@ -566,14 +566,14 @@ request_firmware_nowait(
.uevent = uevent,
};
- ret = kernel_thread(request_firmware_work_func, fw_work,
- CLONE_FS | CLONE_FILES);
+ task = kthread_run(request_firmware_work_func, fw_work,
+ "firmware/%s", name);
- if (ret < 0) {
+ if (IS_ERR(task)) {
fw_work->cont(NULL, fw_work->context);
module_put(fw_work->module);
kfree(fw_work);
- return ret;
+ return PTR_ERR(task);
}
return 0;
}
@@ -602,7 +602,7 @@ firmware_class_exit(void)
class_unregister(&firmware_class);
}
-module_init(firmware_class_init);
+fs_initcall(firmware_class_init);
module_exit(firmware_class_exit);
EXPORT_SYMBOL(release_firmware);
diff --git a/drivers/base/hypervisor.c b/drivers/base/hypervisor.c
index 0c85e9d6a44..7080b413ddc 100644
--- a/drivers/base/hypervisor.c
+++ b/drivers/base/hypervisor.c
@@ -1,8 +1,9 @@
/*
* hypervisor.c - /sys/hypervisor subsystem.
*
- * This file is released under the GPLv2
+ * Copyright (C) IBM Corp. 2006
*
+ * This file is released under the GPLv2
*/
#include <linux/kobject.h>
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index dd547af4681..c6b7d9c4b65 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -306,11 +306,13 @@ static ssize_t
memory_probe_store(struct class *class, const char *buf, size_t count)
{
u64 phys_addr;
+ int nid;
int ret;
phys_addr = simple_strtoull(buf, NULL, 0);
- ret = add_memory(phys_addr, PAGES_PER_SECTION << PAGE_SHIFT);
+ nid = memory_add_physaddr_to_nid(phys_addr);
+ ret = add_memory(nid, phys_addr, PAGES_PER_SECTION << PAGE_SHIFT);
if (ret)
count = ret;
diff --git a/drivers/base/node.c b/drivers/base/node.c
index c80c3aeed00..001e6f6b9c1 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -11,6 +11,7 @@
#include <linux/cpumask.h>
#include <linux/topology.h>
#include <linux/nodemask.h>
+#include <linux/cpu.h>
static struct sysdev_class node_class = {
set_kset_name("node"),
@@ -39,24 +40,13 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
int n;
int nid = dev->id;
struct sysinfo i;
- struct page_state ps;
unsigned long inactive;
unsigned long active;
unsigned long free;
si_meminfo_node(&i, nid);
- get_page_state_node(&ps, nid);
__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
- /* Check for negative values in these approximate counters */
- if ((long)ps.nr_dirty < 0)
- ps.nr_dirty = 0;
- if ((long)ps.nr_writeback < 0)
- ps.nr_writeback = 0;
- if ((long)ps.nr_mapped < 0)
- ps.nr_mapped = 0;
- if ((long)ps.nr_slab < 0)
- ps.nr_slab = 0;
n = sprintf(buf, "\n"
"Node %d MemTotal: %8lu kB\n"
@@ -64,27 +54,46 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
"Node %d MemUsed: %8lu kB\n"
"Node %d Active: %8lu kB\n"
"Node %d Inactive: %8lu kB\n"
+#ifdef CONFIG_HIGHMEM
"Node %d HighTotal: %8lu kB\n"
"Node %d HighFree: %8lu kB\n"
"Node %d LowTotal: %8lu kB\n"
"Node %d LowFree: %8lu kB\n"
+#endif
"Node %d Dirty: %8lu kB\n"
"Node %d Writeback: %8lu kB\n"
+ "Node %d FilePages: %8lu kB\n"
"Node %d Mapped: %8lu kB\n"
- "Node %d Slab: %8lu kB\n",
+ "Node %d AnonPages: %8lu kB\n"
+ "Node %d PageTables: %8lu kB\n"
+ "Node %d NFS_Unstable: %8lu kB\n"
+ "Node %d Bounce: %8lu kB\n"
+ "Node %d Slab: %8lu kB\n"
+ "Node %d SReclaimable: %8lu kB\n"
+ "Node %d SUnreclaim: %8lu kB\n",
nid, K(i.totalram),
nid, K(i.freeram),
nid, K(i.totalram - i.freeram),
nid, K(active),
nid, K(inactive),
+#ifdef CONFIG_HIGHMEM
nid, K(i.totalhigh),
nid, K(i.freehigh),
nid, K(i.totalram - i.totalhigh),
nid, K(i.freeram - i.freehigh),
- nid, K(ps.nr_dirty),
- nid, K(ps.nr_writeback),
- nid, K(ps.nr_mapped),
- nid, K(ps.nr_slab));
+#endif
+ nid, K(node_page_state(nid, NR_FILE_DIRTY)),
+ nid, K(node_page_state(nid, NR_WRITEBACK)),
+ nid, K(node_page_state(nid, NR_FILE_PAGES)),
+ nid, K(node_page_state(nid, NR_FILE_MAPPED)),
+ nid, K(node_page_state(nid, NR_ANON_PAGES)),
+ nid, K(node_page_state(nid, NR_PAGETABLE)),
+ nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
+ nid, K(node_page_state(nid, NR_BOUNCE)),
+ nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
+ node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
+ nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
+ nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;
}
@@ -94,28 +103,6 @@ static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
{
- unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign;
- unsigned long local_node, other_node;
- int i, cpu;
- pg_data_t *pg = NODE_DATA(dev->id);
- numa_hit = 0;
- numa_miss = 0;
- interleave_hit = 0;
- numa_foreign = 0;
- local_node = 0;
- other_node = 0;
- for (i = 0; i < MAX_NR_ZONES; i++) {
- struct zone *z = &pg->node_zones[i];
- for_each_online_cpu(cpu) {
- struct per_cpu_pageset *ps = zone_pcp(z,cpu);
- numa_hit += ps->numa_hit;
- numa_miss += ps->numa_miss;
- numa_foreign += ps->numa_foreign;
- interleave_hit += ps->interleave_hit;
- local_node += ps->local_node;
- other_node += ps->other_node;
- }
- }
return sprintf(buf,
"numa_hit %lu\n"
"numa_miss %lu\n"
@@ -123,12 +110,12 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
"interleave_hit %lu\n"
"local_node %lu\n"
"other_node %lu\n",
- numa_hit,
- numa_miss,
- numa_foreign,
- interleave_hit,
- local_node,
- other_node);
+ node_page_state(dev->id, NUMA_HIT),
+ node_page_state(dev->id, NUMA_MISS),
+ node_page_state(dev->id, NUMA_FOREIGN),
+ node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
+ node_page_state(dev->id, NUMA_LOCAL),
+ node_page_state(dev->id, NUMA_OTHER));
}
static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
@@ -190,6 +177,66 @@ void unregister_node(struct node *node)
sysdev_unregister(&node->sysdev);
}
+struct node node_devices[MAX_NUMNODES];
+
+/*
+ * register cpu under node
+ */
+int register_cpu_under_node(unsigned int cpu, unsigned int nid)
+{
+ if (node_online(nid)) {
+ struct sys_device *obj = get_cpu_sysdev(cpu);
+ if (!obj)
+ return 0;
+ return sysfs_create_link(&node_devices[nid].sysdev.kobj,
+ &obj->kobj,
+ kobject_name(&obj->kobj));
+ }
+
+ return 0;
+}
+
+int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
+{
+ if (node_online(nid)) {
+ struct sys_device *obj = get_cpu_sysdev(cpu);
+ if (obj)
+ sysfs_remove_link(&node_devices[nid].sysdev.kobj,
+ kobject_name(&obj->kobj));
+ }
+ return 0;
+}
+
+int register_one_node(int nid)
+{
+ int error = 0;
+ int cpu;
+
+ if (node_online(nid)) {
+ int p_node = parent_node(nid);
+ struct node *parent = NULL;
+
+ if (p_node != nid)
+ parent = &node_devices[p_node];
+
+ error = register_node(&node_devices[nid], nid, parent);
+
+ /* link cpu under this node */
+ for_each_present_cpu(cpu) {
+ if (cpu_to_node(cpu) == nid)
+ register_cpu_under_node(cpu, nid);
+ }
+ }
+
+ return error;
+
+}
+
+void unregister_one_node(int nid)
+{
+ unregister_node(&node_devices[nid]);
+}
+
static int __init register_node_type(void)
{
return sysdev_class_register(&node_class);
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 2b8755db76c..940ce41f188 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -505,12 +505,36 @@ static int platform_match(struct device * dev, struct device_driver * drv)
return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
}
-static int platform_suspend(struct device * dev, pm_message_t state)
+static int platform_suspend(struct device *dev, pm_message_t mesg)
{
int ret = 0;
if (dev->driver && dev->driver->suspend)
- ret = dev->driver->suspend(dev, state);
+ ret = dev->driver->suspend(dev, mesg);
+
+ return ret;
+}
+
+static int platform_suspend_late(struct device *dev, pm_message_t mesg)
+{
+ struct platform_driver *drv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ int ret = 0;
+
+ if (dev->driver && drv->suspend_late)
+ ret = drv->suspend_late(pdev, mesg);
+
+ return ret;
+}
+
+static int platform_resume_early(struct device *dev)
+{
+ struct platform_driver *drv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ int ret = 0;
+
+ if (dev->driver && drv->resume_early)
+ ret = drv->resume_early(pdev);
return ret;
}
@@ -531,6 +555,8 @@ struct bus_type platform_bus_type = {
.match = platform_match,
.uevent = platform_uevent,
.suspend = platform_suspend,
+ .suspend_late = platform_suspend_late,
+ .resume_early = platform_resume_early,
.resume = platform_resume,
};
EXPORT_SYMBOL_GPL(platform_bus_type);
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index ceeeba2c56c..91f230939c1 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -1,5 +1,6 @@
obj-y := shutdown.o
obj-$(CONFIG_PM) += main.o suspend.o resume.o runtime.o sysfs.o
+obj-$(CONFIG_PM_TRACE) += trace.o
ifeq ($(CONFIG_DEBUG_DRIVER),y)
EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 0d2e101e4f1..fdfa3d0cf6a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -19,7 +19,6 @@
* ancestral dependencies that the subsystem list maintains.
*/
-#include <linux/config.h>
#include <linux/device.h>
#include "power.h"
diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c
index 317edbf0fec..020be36705a 100644
--- a/drivers/base/power/resume.c
+++ b/drivers/base/power/resume.c
@@ -9,6 +9,7 @@
*/
#include <linux/device.h>
+#include <linux/resume-trace.h>
#include "../base.h"
#include "power.h"
@@ -23,6 +24,8 @@ int resume_device(struct device * dev)
{
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_RESUME(0);
down(&dev->sem);
if (dev->power.pm_parent
&& dev->power.pm_parent->power.power_state.event) {
@@ -35,12 +38,35 @@ int resume_device(struct device * dev)
dev_dbg(dev,"resuming\n");
error = dev->bus->resume(dev);
}
+ if (dev->class && dev->class->resume) {
+ dev_dbg(dev,"class resume\n");
+ error = dev->class->resume(dev);
+ }
up(&dev->sem);
+ TRACE_RESUME(error);
return error;
}
+static int resume_device_early(struct device * dev)
+{
+ int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_RESUME(0);
+ if (dev->bus && dev->bus->resume_early) {
+ dev_dbg(dev,"EARLY resume\n");
+ error = dev->bus->resume_early(dev);
+ }
+ TRACE_RESUME(error);
+ return error;
+}
+
+/*
+ * Resume the devices that have either not gone through
+ * the late suspend, or that did go through it but also
+ * went through the early resume
+ */
void dpm_resume(void)
{
down(&dpm_list_sem);
@@ -49,8 +75,7 @@ void dpm_resume(void)
struct device * dev = to_device(entry);
get_device(dev);
- list_del_init(entry);
- list_add_tail(entry, &dpm_active);
+ list_move_tail(entry, &dpm_active);
up(&dpm_list_sem);
if (!dev->power.prev_state.event)
@@ -71,6 +96,7 @@ void dpm_resume(void)
void device_resume(void)
{
+ might_sleep();
down(&dpm_sem);
dpm_resume();
up(&dpm_sem);
@@ -80,12 +106,12 @@ EXPORT_SYMBOL_GPL(device_resume);
/**
- * device_power_up_irq - Power on some devices.
+ * dpm_power_up - Power on some devices.
*
* Walk the dpm_off_irq list and power each device up. This
* is used for devices that required they be powered down with
- * interrupts disabled. As devices are powered on, they are moved to
- * the dpm_suspended list.
+ * interrupts disabled. As devices are powered on, they are moved
+ * to the dpm_active list.
*
* Interrupts must be disabled when calling this.
*/
@@ -96,17 +122,14 @@ void dpm_power_up(void)
struct list_head * entry = dpm_off_irq.next;
struct device * dev = to_device(entry);
- get_device(dev);
- list_del_init(entry);
- list_add_tail(entry, &dpm_active);
- resume_device(dev);
- put_device(dev);
+ list_move_tail(entry, &dpm_off);
+ resume_device_early(dev);
}
}
/**
- * device_pm_power_up - Turn on all devices that need special attention.
+ * device_power_up - Turn on all devices that need special attention.
*
* Power on system devices then devices that required we shut them down
* with interrupts disabled.
diff --git a/drivers/base/power/shutdown.c b/drivers/base/power/shutdown.c
index 8826a5b6673..3483ae4d57f 100644
--- a/drivers/base/power/shutdown.c
+++ b/drivers/base/power/shutdown.c
@@ -8,7 +8,6 @@
*
*/
-#include <linux/config.h>
#include <linux/device.h>
#include <asm/semaphore.h>
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index 1a1fe43a305..ece136bf97e 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -34,6 +34,7 @@ static inline char *suspend_verb(u32 event)
switch (event) {
case PM_EVENT_SUSPEND: return "suspend";
case PM_EVENT_FREEZE: return "freeze";
+ case PM_EVENT_PRETHAW: return "prethaw";
default: return "(unknown suspend event)";
}
}
@@ -65,7 +66,19 @@ int suspend_device(struct device * dev, pm_message_t state)
dev->power.prev_state = dev->power.power_state;
- if (dev->bus && dev->bus->suspend && !dev->power.power_state.event) {
+ if (dev->class && dev->class->suspend && !dev->power.power_state.event) {
+ dev_dbg(dev, "class %s%s\n",
+ suspend_verb(state.event),
+ ((state.event == PM_EVENT_SUSPEND)
+ && device_may_wakeup(dev))
+ ? ", may wakeup"
+ : ""
+ );
+ error = dev->class->suspend(dev, state);
+ suspend_report_result(dev->class->suspend, error);
+ }
+
+ if (!error && dev->bus && dev->bus->suspend && !dev->power.power_state.event) {
dev_dbg(dev, "%s%s\n",
suspend_verb(state.event),
((state.event == PM_EVENT_SUSPEND)
@@ -81,15 +94,42 @@ int suspend_device(struct device * dev, pm_message_t state)
}
+/*
+ * This is called with interrupts off, only a single CPU
+ * running. We can't do down() on a semaphore (and we don't
+ * need the protection)
+ */
+static int suspend_device_late(struct device *dev, pm_message_t state)
+{
+ int error = 0;
+
+ if (dev->bus && dev->bus->suspend_late && !dev->power.power_state.event) {
+ dev_dbg(dev, "LATE %s%s\n",
+ suspend_verb(state.event),
+ ((state.event == PM_EVENT_SUSPEND)
+ && device_may_wakeup(dev))
+ ? ", may wakeup"
+ : ""
+ );
+ error = dev->bus->suspend_late(dev, state);
+ suspend_report_result(dev->bus->suspend_late, error);
+ }
+ return error;
+}
+
/**
* device_suspend - Save state and stop all devices in system.
* @state: Power state to put each device in.
*
* Walk the dpm_active list, call ->suspend() for each device, and move
- * it to dpm_off.
- * Check the return value for each. If it returns 0, then we move the
- * the device to the dpm_off list. If it returns -EAGAIN, we move it to
- * the dpm_off_irq list. If we get a different error, try and back out.
+ * it to the dpm_off list.
+ *
+ * (For historical reasons, if it returns -EAGAIN, that used to mean
+ * that the device would be called again with interrupts disabled.
+ * These days, we use the "suspend_late()" callback for that, so we
+ * print a warning and consider it an error).
+ *
+ * If we get a different error, try and back out.
*
* If we hit a failure with any of the devices, call device_resume()
* above to bring the suspended devices back to life.
@@ -100,6 +140,7 @@ int device_suspend(pm_message_t state)
{
int error = 0;
+ might_sleep();
down(&dpm_sem);
down(&dpm_list_sem);
while (!list_empty(&dpm_active) && error == 0) {
@@ -115,42 +156,27 @@ int device_suspend(pm_message_t state)
/* Check if the device got removed */
if (!list_empty(&dev->power.entry)) {
- /* Move it to the dpm_off or dpm_off_irq list */
- if (!error) {
- list_del(&dev->power.entry);
- list_add(&dev->power.entry, &dpm_off);
- } else if (error == -EAGAIN) {
- list_del(&dev->power.entry);
- list_add(&dev->power.entry, &dpm_off_irq);
- error = 0;
- }
+ /* Move it to the dpm_off list */
+ if (!error)
+ list_move(&dev->power.entry, &dpm_off);
}
if (error)
printk(KERN_ERR "Could not suspend device %s: "
- "error %d\n", kobject_name(&dev->kobj), error);
+ "error %d%s\n",
+ kobject_name(&dev->kobj), error,
+ error == -EAGAIN ? " (please convert to suspend_late)" : "");
put_device(dev);
}
up(&dpm_list_sem);
- if (error) {
- /* we failed... before resuming, bring back devices from
- * dpm_off_irq list back to main dpm_off list, we do want
- * to call resume() on them, in case they partially suspended
- * despite returning -EAGAIN
- */
- while (!list_empty(&dpm_off_irq)) {
- struct list_head * entry = dpm_off_irq.next;
- list_del(entry);
- list_add(entry, &dpm_off);
- }
+ if (error)
dpm_resume();
- }
+
up(&dpm_sem);
return error;
}
EXPORT_SYMBOL_GPL(device_suspend);
-
/**
* device_power_down - Shut down special devices.
* @state: Power state to enter.
@@ -165,14 +191,17 @@ int device_power_down(pm_message_t state)
int error = 0;
struct device * dev;
- list_for_each_entry_reverse(dev, &dpm_off_irq, power.entry) {
- if ((error = suspend_device(dev, state)))
- break;
+ while (!list_empty(&dpm_off)) {
+ struct list_head * entry = dpm_off.prev;
+
+ dev = to_device(entry);
+ error = suspend_device_late(dev, state);
+ if (error)
+ goto Error;
+ list_move(&dev->power.entry, &dpm_off_irq);
}
- if (error)
- goto Error;
- if ((error = sysdev_suspend(state)))
- goto Error;
+
+ error = sysdev_suspend(state);
Done:
return error;
Error:
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 40d7242a07c..2d47517dbe3 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -7,22 +7,29 @@
#include "power.h"
+#ifdef CONFIG_PM_SYSFS_DEPRECATED
+
/**
* state - Control current power state of device
*
* show() returns the current power state of the device. '0' indicates
- * the device is on. Other values (1-3) indicate the device is in a low
+ * the device is on. Other values (2) indicate the device is in some low
* power state.
*
- * store() sets the current power state, which is an integer value
- * between 0-3. If the device is on ('0'), and the value written is
- * greater than 0, then the device is placed directly into the low-power
- * state (via its driver's ->suspend() method).
- * If the device is currently in a low-power state, and the value is 0,
- * the device is powered back on (via the ->resume() method).
- * If the device is in a low-power state, and a different low-power state
- * is requested, the device is first resumed, then suspended into the new
- * low-power state.
+ * store() sets the current power state, which is an integer valued
+ * 0, 2, or 3. Devices with bus.suspend_late(), or bus.resume_early()
+ * methods fail this operation; those methods couldn't be called.
+ * Otherwise,
+ *
+ * - If the recorded dev->power.power_state.event matches the
+ * target value, nothing is done.
+ * - If the recorded event code is nonzero, the device is reactivated
+ * by calling bus.resume() and/or class.resume().
+ * - If the target value is nonzero, the device is suspended by
+ * calling class.suspend() and/or bus.suspend() with event code
+ * PM_EVENT_SUSPEND.
+ *
+ * This mechanism is DEPRECATED and should only be used for testing.
*/
static ssize_t state_show(struct device * dev, struct device_attribute *attr, char * buf)
@@ -38,6 +45,10 @@ static ssize_t state_store(struct device * dev, struct device_attribute *attr, c
pm_message_t state;
int error = -EINVAL;
+ /* disallow incomplete suspend sequences */
+ if (dev->bus && (dev->bus->suspend_late || dev->bus->resume_early))
+ return error;
+
state.event = PM_EVENT_SUSPEND;
/* Older apps expected to write "3" here - confused with PCI D3 */
if ((n == 1) && !strcmp(buf, "3"))
@@ -57,6 +68,8 @@ static ssize_t state_store(struct device * dev, struct device_attribute *attr, c
static DEVICE_ATTR(state, 0644, state_show, state_store);
+#endif /* CONFIG_PM_SYSFS_DEPRECATED */
+
/*
* wakeup - Report/change current wakeup option for device
*
@@ -130,7 +143,9 @@ static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store);
static struct attribute * power_attrs[] = {
+#ifdef CONFIG_PM_SYSFS_DEPRECATED
&dev_attr_state.attr,
+#endif
&dev_attr_wakeup.attr,
NULL,
};
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
new file mode 100644
index 00000000000..a9ab30fefff
--- /dev/null
+++ b/drivers/base/power/trace.c
@@ -0,0 +1,228 @@
+/*
+ * drivers/base/power/trace.c
+ *
+ * Copyright (C) 2006 Linus Torvalds
+ *
+ * Trace facility for suspend/resume problems, when none of the
+ * devices may be working.
+ */
+
+#include <linux/resume-trace.h>
+#include <linux/rtc.h>
+
+#include <asm/rtc.h>
+
+#include "power.h"
+
+/*
+ * Horrid, horrid, horrid.
+ *
+ * It turns out that the _only_ piece of hardware that actually
+ * keeps its value across a hard boot (and, more importantly, the
+ * POST init sequence) is literally the realtime clock.
+ *
+ * Never mind that an RTC chip has 114 bytes (and often a whole
+ * other bank of an additional 128 bytes) of nice SRAM that is
+ * _designed_ to keep data - the POST will clear it. So we literally
+ * can just use the few bytes of actual time data, which means that
+ * we're really limited.
+ *
+ * It means, for example, that we can't use the seconds at all
+ * (since the time between the hang and the boot might be more
+ * than a minute), and we'd better not depend on the low bits of
+ * the minutes either.
+ *
+ * There are the wday fields etc, but I wouldn't guarantee those
+ * are dependable either. And if the date isn't valid, either the
+ * hw or POST will do strange things.
+ *
+ * So we're left with:
+ * - year: 0-99
+ * - month: 0-11
+ * - day-of-month: 1-28
+ * - hour: 0-23
+ * - min: (0-30)*2
+ *
+ * Giving us a total range of 0-16128000 (0xf61800), ie less
+ * than 24 bits of actual data we can save across reboots.
+ *
+ * And if your box can't boot in less than three minutes,
+ * you're screwed.
+ *
+ * Now, almost 24 bits of data is pitifully small, so we need
+ * to be pretty dense if we want to use it for anything nice.
+ * What we do is that instead of saving off nice readable info,
+ * we save off _hashes_ of information that we can hopefully
+ * regenerate after the reboot.
+ *
+ * In particular, this means that we might be unlucky, and hit
+ * a case where we have a hash collision, and we end up not
+ * being able to tell for certain exactly which case happened.
+ * But that's hopefully unlikely.
+ *
+ * What we do is to take the bits we can fit, and split them
+ * into three parts (16*997*1009 = 16095568), and use the values
+ * for:
+ * - 0-15: user-settable
+ * - 0-996: file + line number
+ * - 0-1008: device
+ */
+#define USERHASH (16)
+#define FILEHASH (997)
+#define DEVHASH (1009)
+
+#define DEVSEED (7919)
+
+static unsigned int dev_hash_value;
+
+static int set_magic_time(unsigned int user, unsigned int file, unsigned int device)
+{
+ unsigned int n = user + USERHASH*(file + FILEHASH*device);
+
+ // June 7th, 2006
+ static struct rtc_time time = {
+ .tm_sec = 0,
+ .tm_min = 0,
+ .tm_hour = 0,
+ .tm_mday = 7,
+ .tm_mon = 5, // June - counting from zero
+ .tm_year = 106,
+ .tm_wday = 3,
+ .tm_yday = 160,
+ .tm_isdst = 1
+ };
+
+ time.tm_year = (n % 100);
+ n /= 100;
+ time.tm_mon = (n % 12);
+ n /= 12;
+ time.tm_mday = (n % 28) + 1;
+ n /= 28;
+ time.tm_hour = (n % 24);
+ n /= 24;
+ time.tm_min = (n % 20) * 3;
+ n /= 20;
+ set_rtc_time(&time);
+ return n ? -1 : 0;
+}
+
+static unsigned int read_magic_time(void)
+{
+ struct rtc_time time;
+ unsigned int val;
+
+ get_rtc_time(&time);
+ printk("Time: %2d:%02d:%02d Date: %02d/%02d/%02d\n",
+ time.tm_hour, time.tm_min, time.tm_sec,
+ time.tm_mon, time.tm_mday, time.tm_year);
+ val = time.tm_year; /* 100 years */
+ if (val > 100)
+ val -= 100;
+ val += time.tm_mon * 100; /* 12 months */
+ val += (time.tm_mday-1) * 100 * 12; /* 28 month-days */
+ val += time.tm_hour * 100 * 12 * 28; /* 24 hours */
+ val += (time.tm_min / 3) * 100 * 12 * 28 * 24; /* 20 3-minute intervals */
+ return val;
+}
+
+/*
+ * This is just the sdbm hash function with a user-supplied
+ * seed and final size parameter.
+ */
+static unsigned int hash_string(unsigned int seed, const char *data, unsigned int mod)
+{
+ unsigned char c;
+ while ((c = *data++) != 0) {
+ seed = (seed << 16) + (seed << 6) - seed + c;
+ }
+ return seed % mod;
+}
+
+void set_trace_device(struct device *dev)
+{
+ dev_hash_value = hash_string(DEVSEED, dev->bus_id, DEVHASH);
+}
+
+/*
+ * We could just take the "tracedata" index into the .tracedata
+ * section instead. Generating a hash of the data gives us a
+ * chance to work across kernel versions, and perhaps more
+ * importantly it also gives us valid/invalid check (ie we will
+ * likely not give totally bogus reports - if the hash matches,
+ * it's not any guarantee, but it's a high _likelihood_ that
+ * the match is valid).
+ */
+void generate_resume_trace(void *tracedata, unsigned int user)
+{
+ unsigned short lineno = *(unsigned short *)tracedata;
+ const char *file = *(const char **)(tracedata + 2);
+ unsigned int user_hash_value, file_hash_value;
+
+ user_hash_value = user % USERHASH;
+ file_hash_value = hash_string(lineno, file, FILEHASH);
+ set_magic_time(user_hash_value, file_hash_value, dev_hash_value);
+}
+
+extern char __tracedata_start, __tracedata_end;
+static int show_file_hash(unsigned int value)
+{
+ int match;
+ char *tracedata;
+
+ match = 0;
+ for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; tracedata += 6) {
+ unsigned short lineno = *(unsigned short *)tracedata;
+ const char *file = *(const char **)(tracedata + 2);
+ unsigned int hash = hash_string(lineno, file, FILEHASH);
+ if (hash != value)
+ continue;
+ printk(" hash matches %s:%u\n", file, lineno);
+ match++;
+ }
+ return match;
+}
+
+static int show_dev_hash(unsigned int value)
+{
+ int match = 0;
+ struct list_head * entry = dpm_active.prev;
+
+ while (entry != &dpm_active) {
+ struct device * dev = to_device(entry);
+ unsigned int hash = hash_string(DEVSEED, dev->bus_id, DEVHASH);
+ if (hash == value) {
+ printk(" hash matches device %s\n", dev->bus_id);
+ match++;
+ }
+ entry = entry->prev;
+ }
+ return match;
+}
+
+static unsigned int hash_value_early_read;
+
+static int early_resume_init(void)
+{
+ hash_value_early_read = read_magic_time();
+ return 0;
+}
+
+static int late_resume_init(void)
+{
+ unsigned int val = hash_value_early_read;
+ unsigned int user, file, dev;
+
+ user = val % USERHASH;
+ val = val / USERHASH;
+ file = val % FILEHASH;
+ val = val / FILEHASH;
+ dev = val /* % DEVHASH */;
+
+ printk(" Magic number: %d:%d:%d\n", user, file, dev);
+ show_file_hash(file);
+ show_dev_hash(dev);
+ return 0;
+}
+
+core_initcall(early_resume_init);
+late_initcall(late_resume_init);
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 6858178b3af..04e5db445c7 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -12,7 +12,6 @@
* add themselves as children of the system bus.
*/
-#include <linux/config.h>
#include <linux/sysdev.h>
#include <linux/err.h>
#include <linux/module.h>
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 8c52421cbc5..3ef9d514b91 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -107,7 +107,7 @@ static int __cpuinit topology_remove_dev(struct sys_device * sys_dev)
return 0;
}
-static int topology_cpu_callback(struct notifier_block *nfb,
+static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
@@ -125,7 +125,7 @@ static int topology_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
-static struct notifier_block topology_cpu_notifier =
+static struct notifier_block __cpuinitdata topology_cpu_notifier =
{
.notifier_call = topology_cpu_callback,
};
@@ -139,7 +139,7 @@ static int __cpuinit topology_sysfs_init(void)
(void *)(long)i);
}
- register_cpu_notifier(&topology_cpu_notifier);
+ register_hotcpu_notifier(&topology_cpu_notifier);
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-26 18:44:22 +0000