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authorRafael J. Wysocki <rjw@sisk.pl>2011-04-26 19:15:07 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2011-05-11 21:37:15 +0200
commit2e711c04dbbf7a7732a3f7073b1fc285d12b369d (patch)
treedbc06a3fff744144d7937a205a91fd8ce71585d4 /drivers
parentf5a592f7d74e38c5007876c731e6bf5580072e63 (diff)
PM: Remove sysdev suspend, resume and shutdown operations
Since suspend, resume and shutdown operations in struct sysdev_class and struct sysdev_driver are not used any more, remove them. Also drop sysdev_suspend(), sysdev_resume() and sysdev_shutdown() used for executing those operations and modify all of their users accordingly. This reduces kernel code size quite a bit and reduces its complexity. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/Kconfig7
-rw-r--r--drivers/base/base.h2
-rw-r--r--drivers/base/sys.c202
-rw-r--r--drivers/xen/manage.c8
4 files changed, 3 insertions, 216 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index e9e5238f3106..d57e8d0fb823 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -168,11 +168,4 @@ config SYS_HYPERVISOR
bool
default n
-config ARCH_NO_SYSDEV_OPS
- bool
- ---help---
- To be selected by architectures that don't use sysdev class or
- sysdev driver power management (suspend/resume) and shutdown
- operations.
-
endmenu
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 19f49e41ce5d..a34dca0ad041 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -111,8 +111,6 @@ static inline int driver_match_device(struct device_driver *drv,
return drv->bus->match ? drv->bus->match(dev, drv) : 1;
}
-extern void sysdev_shutdown(void);
-
extern char *make_class_name(const char *name, struct kobject *kobj);
extern int devres_release_all(struct device *dev);
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index acde9b5ee131..9dff77bfe1e3 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -328,203 +328,8 @@ void sysdev_unregister(struct sys_device *sysdev)
kobject_put(&sysdev->kobj);
}
-
-#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
-/**
- * sysdev_shutdown - Shut down all system devices.
- *
- * Loop over each class of system devices, and the devices in each
- * of those classes. For each device, we call the shutdown method for
- * each driver registered for the device - the auxiliaries,
- * and the class driver.
- *
- * Note: The list is iterated in reverse order, so that we shut down
- * child devices before we shut down their parents. The list ordering
- * is guaranteed by virtue of the fact that child devices are registered
- * after their parents.
- */
-void sysdev_shutdown(void)
-{
- struct sysdev_class *cls;
-
- pr_debug("Shutting Down System Devices\n");
-
- mutex_lock(&sysdev_drivers_lock);
- list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {
- struct sys_device *sysdev;
-
- pr_debug("Shutting down type '%s':\n",
- kobject_name(&cls->kset.kobj));
-
- list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
- struct sysdev_driver *drv;
- pr_debug(" %s\n", kobject_name(&sysdev->kobj));
-
- /* Call auxiliary drivers first */
- list_for_each_entry(drv, &cls->drivers, entry) {
- if (drv->shutdown)
- drv->shutdown(sysdev);
- }
-
- /* Now call the generic one */
- if (cls->shutdown)
- cls->shutdown(sysdev);
- }
- }
- mutex_unlock(&sysdev_drivers_lock);
-}
-
-static void __sysdev_resume(struct sys_device *dev)
-{
- struct sysdev_class *cls = dev->cls;
- struct sysdev_driver *drv;
-
- /* First, call the class-specific one */
- if (cls->resume)
- cls->resume(dev);
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled after %pF\n", cls->resume);
-
- /* Call auxiliary drivers next. */
- list_for_each_entry(drv, &cls->drivers, entry) {
- if (drv->resume)
- drv->resume(dev);
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled after %pF\n", drv->resume);
- }
-}
-
-/**
- * sysdev_suspend - Suspend all system devices.
- * @state: Power state to enter.
- *
- * We perform an almost identical operation as sysdev_shutdown()
- * above, though calling ->suspend() instead. Interrupts are disabled
- * when this called. Devices are responsible for both saving state and
- * quiescing or powering down the device.
- *
- * This is only called by the device PM core, so we let them handle
- * all synchronization.
- */
-int sysdev_suspend(pm_message_t state)
-{
- struct sysdev_class *cls;
- struct sys_device *sysdev, *err_dev;
- struct sysdev_driver *drv, *err_drv;
- int ret;
-
- pr_debug("Checking wake-up interrupts\n");
-
- /* Return error code if there are any wake-up interrupts pending */
- ret = check_wakeup_irqs();
- if (ret)
- return ret;
-
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled while suspending system devices\n");
-
- pr_debug("Suspending System Devices\n");
-
- list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {
- pr_debug("Suspending type '%s':\n",
- kobject_name(&cls->kset.kobj));
-
- list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
- pr_debug(" %s\n", kobject_name(&sysdev->kobj));
-
- /* Call auxiliary drivers first */
- list_for_each_entry(drv, &cls->drivers, entry) {
- if (drv->suspend) {
- ret = drv->suspend(sysdev, state);
- if (ret)
- goto aux_driver;
- }
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled after %pF\n",
- drv->suspend);
- }
-
- /* Now call the generic one */
- if (cls->suspend) {
- ret = cls->suspend(sysdev, state);
- if (ret)
- goto cls_driver;
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled after %pF\n",
- cls->suspend);
- }
- }
- }
- return 0;
- /* resume current sysdev */
-cls_driver:
- drv = NULL;
- printk(KERN_ERR "Class suspend failed for %s: %d\n",
- kobject_name(&sysdev->kobj), ret);
-
-aux_driver:
- if (drv)
- printk(KERN_ERR "Class driver suspend failed for %s: %d\n",
- kobject_name(&sysdev->kobj), ret);
- list_for_each_entry(err_drv, &cls->drivers, entry) {
- if (err_drv == drv)
- break;
- if (err_drv->resume)
- err_drv->resume(sysdev);
- }
-
- /* resume other sysdevs in current class */
- list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
- if (err_dev == sysdev)
- break;
- pr_debug(" %s\n", kobject_name(&err_dev->kobj));
- __sysdev_resume(err_dev);
- }
-
- /* resume other classes */
- list_for_each_entry_continue(cls, &system_kset->list, kset.kobj.entry) {
- list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
- pr_debug(" %s\n", kobject_name(&err_dev->kobj));
- __sysdev_resume(err_dev);
- }
- }
- return ret;
-}
-EXPORT_SYMBOL_GPL(sysdev_suspend);
-
-/**
- * sysdev_resume - Bring system devices back to life.
- *
- * Similar to sysdev_suspend(), but we iterate the list forwards
- * to guarantee that parent devices are resumed before their children.
- *
- * Note: Interrupts are disabled when called.
- */
-int sysdev_resume(void)
-{
- struct sysdev_class *cls;
-
- WARN_ONCE(!irqs_disabled(),
- "Interrupts enabled while resuming system devices\n");
-
- pr_debug("Resuming System Devices\n");
-
- list_for_each_entry(cls, &system_kset->list, kset.kobj.entry) {
- struct sys_device *sysdev;
-
- pr_debug("Resuming type '%s':\n",
- kobject_name(&cls->kset.kobj));
-
- list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
- pr_debug(" %s\n", kobject_name(&sysdev->kobj));
-
- __sysdev_resume(sysdev);
- }
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(sysdev_resume);
-#endif /* CONFIG_ARCH_NO_SYSDEV_OPS */
+EXPORT_SYMBOL_GPL(sysdev_register);
+EXPORT_SYMBOL_GPL(sysdev_unregister);
int __init system_bus_init(void)
{
@@ -534,9 +339,6 @@ int __init system_bus_init(void)
return 0;
}
-EXPORT_SYMBOL_GPL(sysdev_register);
-EXPORT_SYMBOL_GPL(sysdev_unregister);
-
#define to_ext_attr(x) container_of(x, struct sysdev_ext_attribute, attr)
ssize_t sysdev_store_ulong(struct sys_device *sysdev,
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index a2eee574784e..0b5366b5be20 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -70,12 +70,7 @@ static int xen_suspend(void *data)
BUG_ON(!irqs_disabled());
- err = sysdev_suspend(PMSG_FREEZE);
- if (!err) {
- err = syscore_suspend();
- if (err)
- sysdev_resume();
- }
+ err = syscore_suspend();
if (err) {
printk(KERN_ERR "xen_suspend: system core suspend failed: %d\n",
err);
@@ -102,7 +97,6 @@ static int xen_suspend(void *data)
}
syscore_resume();
- sysdev_resume();
return 0;
}