Merge branch 'master' into sh/hw-breakpoints

8 files changed, 195 insertions, 39 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 63c143e54a5..c0c5a43d9fb 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -703,9 +703,9 @@ int bus_add_driver(struct device_driver *drv)
 	return 0;
 
 out_unregister:
+	kobject_put(&priv->kobj);
 	kfree(drv->p);
 	drv->p = NULL;
-	kobject_put(&priv->kobj);
 out_put_bus:
 	bus_put(bus);
 	return error;
diff --git a/drivers/base/core.c b/drivers/base/core.c
index f1290cbd135..28202577042 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -446,7 +446,8 @@ struct kset *devices_kset;
  * @dev: device.
  * @attr: device attribute descriptor.
  */
-int device_create_file(struct device *dev, struct device_attribute *attr)
+int device_create_file(struct device *dev,
+		       const struct device_attribute *attr)
 {
 	int error = 0;
 	if (dev)
@@ -459,7 +460,8 @@ int device_create_file(struct device *dev, struct device_attribute *attr)
  * @dev: device.
  * @attr: device attribute descriptor.
  */
-void device_remove_file(struct device *dev, struct device_attribute *attr)
+void device_remove_file(struct device *dev,
+			const struct device_attribute *attr)
 {
 	if (dev)
 		sysfs_remove_file(&dev->kobj, &attr->attr);
@@ -470,7 +472,8 @@ void device_remove_file(struct device *dev, struct device_attribute *attr)
  * @dev: device.
  * @attr: device binary attribute descriptor.
  */
-int device_create_bin_file(struct device *dev, struct bin_attribute *attr)
+int device_create_bin_file(struct device *dev,
+			   const struct bin_attribute *attr)
 {
 	int error = -EINVAL;
 	if (dev)
@@ -484,7 +487,8 @@ EXPORT_SYMBOL_GPL(device_create_bin_file);
  * @dev: device.
  * @attr: device binary attribute descriptor.
  */
-void device_remove_bin_file(struct device *dev, struct bin_attribute *attr)
+void device_remove_bin_file(struct device *dev,
+			    const struct bin_attribute *attr)
 {
 	if (dev)
 		sysfs_remove_bin_file(&dev->kobj, attr);
@@ -905,8 +909,10 @@ int device_add(struct device *dev)
 		dev->init_name = NULL;
 	}
 
-	if (!dev_name(dev))
+	if (!dev_name(dev)) {
+		error = -EINVAL;
 		goto name_error;
+	}
 
 	pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
 
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 50375bb8e51..090dd485130 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -32,7 +32,7 @@ static int dev_mount = 1;
 static int dev_mount;
 #endif
 
-static rwlock_t dirlock;
+static DEFINE_MUTEX(dirlock);
 
 static int __init mount_param(char *str)
 {
@@ -93,7 +93,7 @@ static int create_path(const char *nodepath)
 {
 	int err;
 
-	read_lock(&dirlock);
+	mutex_lock(&dirlock);
 	err = dev_mkdir(nodepath, 0755);
 	if (err == -ENOENT) {
 		char *path;
@@ -101,8 +101,10 @@ static int create_path(const char *nodepath)
 
 		/* parent directories do not exist, create them */
 		path = kstrdup(nodepath, GFP_KERNEL);
-		if (!path)
-			return -ENOMEM;
+		if (!path) {
+			err = -ENOMEM;
+			goto out;
+		}
 		s = path;
 		for (;;) {
 			s = strchr(s, '/');
@@ -117,7 +119,8 @@ static int create_path(const char *nodepath)
 		}
 		kfree(path);
 	}
-	read_unlock(&dirlock);
+out:
+	mutex_unlock(&dirlock);
 	return err;
 }
 
@@ -229,7 +232,7 @@ static int delete_path(const char *nodepath)
 	if (!path)
 		return -ENOMEM;
 
-	write_lock(&dirlock);
+	mutex_lock(&dirlock);
 	for (;;) {
 		char *base;
 
@@ -241,7 +244,7 @@ static int delete_path(const char *nodepath)
 		if (err)
 			break;
 	}
-	write_unlock(&dirlock);
+	mutex_unlock(&dirlock);
 
 	kfree(path);
 	return err;
@@ -352,8 +355,6 @@ int __init devtmpfs_init(void)
 	int err;
 	struct vfsmount *mnt;
 
-	rwlock_init(&dirlock);
-
 	err = register_filesystem(&dev_fs_type);
 	if (err) {
 		printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index f367885a764..90c9fff09ea 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -98,7 +98,7 @@ EXPORT_SYMBOL_GPL(driver_find_device);
  * @attr: driver attribute descriptor.
  */
 int driver_create_file(struct device_driver *drv,
-		       struct driver_attribute *attr)
+		       const struct driver_attribute *attr)
 {
 	int error;
 	if (drv)
@@ -115,7 +115,7 @@ EXPORT_SYMBOL_GPL(driver_create_file);
  * @attr: driver attribute descriptor.
  */
 void driver_remove_file(struct device_driver *drv,
-			struct driver_attribute *attr)
+			const struct driver_attribute *attr)
 {
 	if (drv)
 		sysfs_remove_file(&drv->p->kobj, &attr->attr);
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index c4c8f2e1dd1..d7d77d4a402 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -63,6 +63,20 @@ void unregister_memory_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL(unregister_memory_notifier);
 
+static ATOMIC_NOTIFIER_HEAD(memory_isolate_chain);
+
+int register_memory_isolate_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_register(&memory_isolate_chain, nb);
+}
+EXPORT_SYMBOL(register_memory_isolate_notifier);
+
+void unregister_memory_isolate_notifier(struct notifier_block *nb)
+{
+	atomic_notifier_chain_unregister(&memory_isolate_chain, nb);
+}
+EXPORT_SYMBOL(unregister_memory_isolate_notifier);
+
 /*
  * register_memory - Setup a sysfs device for a memory block
  */
@@ -157,6 +171,11 @@ int memory_notify(unsigned long val, void *v)
 	return blocking_notifier_call_chain(&memory_chain, val, v);
 }
 
+int memory_isolate_notify(unsigned long val, void *v)
+{
+	return atomic_notifier_call_chain(&memory_isolate_chain, val, v);
+}
+
 /*
  * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
  * OK to have direct references to sparsemem variables in here.
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 9d2ee25deaf..58efaf2f125 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -441,6 +441,7 @@ error:
 	platform_device_put(pdev);
 	return ERR_PTR(retval);
 }
+EXPORT_SYMBOL_GPL(platform_device_register_data);
 
 static int platform_drv_probe(struct device *_dev)
 {
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 1a216c114a0..48adf80926a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -161,6 +161,32 @@ void device_pm_move_last(struct device *dev)
 	list_move_tail(&dev->power.entry, &dpm_list);
 }
 
+static ktime_t initcall_debug_start(struct device *dev)
+{
+	ktime_t calltime = ktime_set(0, 0);
+
+	if (initcall_debug) {
+		pr_info("calling  %s+ @ %i\n",
+				dev_name(dev), task_pid_nr(current));
+		calltime = ktime_get();
+	}
+
+	return calltime;
+}
+
+static void initcall_debug_report(struct device *dev, ktime_t calltime,
+				  int error)
+{
+	ktime_t delta, rettime;
+
+	if (initcall_debug) {
+		rettime = ktime_get();
+		delta = ktime_sub(rettime, calltime);
+		pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
+			error, (unsigned long long)ktime_to_ns(delta) >> 10);
+	}
+}
+
 /**
  * pm_op - Execute the PM operation appropriate for given PM event.
  * @dev: Device to handle.
@@ -172,13 +198,9 @@ static int pm_op(struct device *dev,
 		 pm_message_t state)
 {
 	int error = 0;
-	ktime_t calltime, delta, rettime;
+	ktime_t calltime;
 
-	if (initcall_debug) {
-		pr_info("calling  %s+ @ %i\n",
-				dev_name(dev), task_pid_nr(current));
-		calltime = ktime_get();
-	}
+	calltime = initcall_debug_start(dev);
 
 	switch (state.event) {
 #ifdef CONFIG_SUSPEND
@@ -227,12 +249,7 @@ static int pm_op(struct device *dev,
 		error = -EINVAL;
 	}
 
-	if (initcall_debug) {
-		rettime = ktime_get();
-		delta = ktime_sub(rettime, calltime);
-		pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
-			error, (unsigned long long)ktime_to_ns(delta) >> 10);
-	}
+	initcall_debug_report(dev, calltime, error);
 
 	return error;
 }
@@ -309,8 +326,9 @@ static int pm_noirq_op(struct device *dev,
 	if (initcall_debug) {
 		rettime = ktime_get();
 		delta = ktime_sub(rettime, calltime);
-		printk("initcall %s_i+ returned %d after %Ld usecs\n", dev_name(dev),
-			error, (unsigned long long)ktime_to_ns(delta) >> 10);
+		printk("initcall %s_i+ returned %d after %Ld usecs\n",
+			dev_name(dev), error,
+			(unsigned long long)ktime_to_ns(delta) >> 10);
 	}
 
 	return error;
@@ -354,6 +372,23 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
 		kobject_name(&dev->kobj), pm_verb(state.event), info, error);
 }
 
+static void dpm_show_time(ktime_t starttime, pm_message_t state, char *info)
+{
+	ktime_t calltime;
+	s64 usecs64;
+	int usecs;
+
+	calltime = ktime_get();
+	usecs64 = ktime_to_ns(ktime_sub(calltime, starttime));
+	do_div(usecs64, NSEC_PER_USEC);
+	usecs = usecs64;
+	if (usecs == 0)
+		usecs = 1;
+	pr_info("PM: %s%s%s of devices complete after %ld.%03ld msecs\n",
+		info ?: "", info ? " " : "", pm_verb(state.event),
+		usecs / USEC_PER_MSEC, usecs % USEC_PER_MSEC);
+}
+
 /*------------------------- Resume routines -------------------------*/
 
 /**
@@ -390,6 +425,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
 void dpm_resume_noirq(pm_message_t state)
 {
 	struct device *dev;
+	ktime_t starttime = ktime_get();
 
 	mutex_lock(&dpm_list_mtx);
 	transition_started = false;
@@ -403,11 +439,32 @@ void dpm_resume_noirq(pm_message_t state)
 				pm_dev_err(dev, state, " early", error);
 		}
 	mutex_unlock(&dpm_list_mtx);
+	dpm_show_time(starttime, state, "early");
 	resume_device_irqs();
 }
 EXPORT_SYMBOL_GPL(dpm_resume_noirq);
 
 /**
+ * legacy_resume - Execute a legacy (bus or class) resume callback for device.
+ * dev: Device to resume.
+ * cb: Resume callback to execute.
+ */
+static int legacy_resume(struct device *dev, int (*cb)(struct device *dev))
+{
+	int error;
+	ktime_t calltime;
+
+	calltime = initcall_debug_start(dev);
+
+	error = cb(dev);
+	suspend_report_result(cb, error);
+
+	initcall_debug_report(dev, calltime, error);
+
+	return error;
+}
+
+/**
  * device_resume - Execute "resume" callbacks for given device.
  * @dev: Device to handle.
  * @state: PM transition of the system being carried out.
@@ -427,7 +484,7 @@ static int device_resume(struct device *dev, pm_message_t state)
 			error = pm_op(dev, dev->bus->pm, state);
 		} else if (dev->bus->resume) {
 			pm_dev_dbg(dev, state, "legacy ");
-			error = dev->bus->resume(dev);
+			error = legacy_resume(dev, dev->bus->resume);
 		}
 		if (error)
 			goto End;
@@ -448,7 +505,7 @@ static int device_resume(struct device *dev, pm_message_t state)
 			error = pm_op(dev, dev->class->pm, state);
 		} else if (dev->class->resume) {
 			pm_dev_dbg(dev, state, "legacy class ");
-			error = dev->class->resume(dev);
+			error = legacy_resume(dev, dev->class->resume);
 		}
 	}
  End:
@@ -468,6 +525,7 @@ static int device_resume(struct device *dev, pm_message_t state)
 static void dpm_resume(pm_message_t state)
 {
 	struct list_head list;
+	ktime_t starttime = ktime_get();
 
 	INIT_LIST_HEAD(&list);
 	mutex_lock(&dpm_list_mtx);
@@ -496,6 +554,7 @@ static void dpm_resume(pm_message_t state)
 	}
 	list_splice(&list, &dpm_list);
 	mutex_unlock(&dpm_list_mtx);
+	dpm_show_time(starttime, state, NULL);
 }
 
 /**
@@ -548,7 +607,7 @@ static void dpm_complete(pm_message_t state)
 			mutex_unlock(&dpm_list_mtx);
 
 			device_complete(dev, state);
-			pm_runtime_put_noidle(dev);
+			pm_runtime_put_sync(dev);
 
 			mutex_lock(&dpm_list_mtx);
 		}
@@ -628,6 +687,7 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
 int dpm_suspend_noirq(pm_message_t state)
 {
 	struct device *dev;
+	ktime_t starttime = ktime_get();
 	int error = 0;
 
 	suspend_device_irqs();
@@ -643,11 +703,34 @@ int dpm_suspend_noirq(pm_message_t state)
 	mutex_unlock(&dpm_list_mtx);
 	if (error)
 		dpm_resume_noirq(resume_event(state));
+	else
+		dpm_show_time(starttime, state, "late");
 	return error;
 }
 EXPORT_SYMBOL_GPL(dpm_suspend_noirq);
 
 /**
+ * legacy_suspend - Execute a legacy (bus or class) suspend callback for device.
+ * dev: Device to suspend.
+ * cb: Suspend callback to execute.
+ */
+static int legacy_suspend(struct device *dev, pm_message_t state,
+			  int (*cb)(struct device *dev, pm_message_t state))
+{
+	int error;
+	ktime_t calltime;
+
+	calltime = initcall_debug_start(dev);
+
+	error = cb(dev, state);
+	suspend_report_result(cb, error);
+
+	initcall_debug_report(dev, calltime, error);
+
+	return error;
+}
+
+/**
  * device_suspend - Execute "suspend" callbacks for given device.
  * @dev: Device to handle.
  * @state: PM transition of the system being carried out.
@@ -664,8 +747,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
 			error = pm_op(dev, dev->class->pm, state);
 		} else if (dev->class->suspend) {
 			pm_dev_dbg(dev, state, "legacy class ");
-			error = dev->class->suspend(dev, state);
-			suspend_report_result(dev->class->suspend, error);
+			error = legacy_suspend(dev, state, dev->class->suspend);
 		}
 		if (error)
 			goto End;
@@ -686,8 +768,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
 			error = pm_op(dev, dev->bus->pm, state);
 		} else if (dev->bus->suspend) {
 			pm_dev_dbg(dev, state, "legacy ");
-			error = dev->bus->suspend(dev, state);
-			suspend_report_result(dev->bus->suspend, error);
+			error = legacy_suspend(dev, state, dev->bus->suspend);
 		}
 	}
  End:
@@ -703,6 +784,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
 static int dpm_suspend(pm_message_t state)
 {
 	struct list_head list;
+	ktime_t starttime = ktime_get();
 	int error = 0;
 
 	INIT_LIST_HEAD(&list);
@@ -728,6 +810,8 @@ static int dpm_suspend(pm_message_t state)
 	}
 	list_splice(&list, dpm_list.prev);
 	mutex_unlock(&dpm_list_mtx);
+	if (!error)
+		dpm_show_time(starttime, state, NULL);
 	return error;
 }
 
@@ -796,7 +880,7 @@ static int dpm_prepare(pm_message_t state)
 		pm_runtime_get_noresume(dev);
 		if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) {
 			/* Wake-up requested during system sleep transition. */
-			pm_runtime_put_noidle(dev);
+			pm_runtime_put_sync(dev);
 			error = -EBUSY;
 		} else {
 			error = device_prepare(dev, state);
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 40d7720a4b2..f8b044e8aef 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -85,6 +85,19 @@ static int __pm_runtime_idle(struct device *dev)
 		dev->bus->pm->runtime_idle(dev);
 
 		spin_lock_irq(&dev->power.lock);
+	} else if (dev->type && dev->type->pm && dev->type->pm->runtime_idle) {
+		spin_unlock_irq(&dev->power.lock);
+
+		dev->type->pm->runtime_idle(dev);
+
+		spin_lock_irq(&dev->power.lock);
+	} else if (dev->class && dev->class->pm
+	    && dev->class->pm->runtime_idle) {
+		spin_unlock_irq(&dev->power.lock);
+
+		dev->class->pm->runtime_idle(dev);
+
+		spin_lock_irq(&dev->power.lock);
 	}
 
 	dev->power.idle_notification = false;
@@ -194,6 +207,22 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
 
 		spin_lock_irq(&dev->power.lock);
 		dev->power.runtime_error = retval;
+	} else if (dev->type && dev->type->pm
+	    && dev->type->pm->runtime_suspend) {
+		spin_unlock_irq(&dev->power.lock);
+
+		retval = dev->type->pm->runtime_suspend(dev);
+
+		spin_lock_irq(&dev->power.lock);
+		dev->power.runtime_error = retval;
+	} else if (dev->class && dev->class->pm
+	    && dev->class->pm->runtime_suspend) {
+		spin_unlock_irq(&dev->power.lock);
+
+		retval = dev->class->pm->runtime_suspend(dev);
+
+		spin_lock_irq(&dev->power.lock);
+		dev->power.runtime_error = retval;
 	} else {
 		retval = -ENOSYS;
 	}
@@ -359,6 +388,22 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
 
 		spin_lock_irq(&dev->power.lock);
 		dev->power.runtime_error = retval;
+	} else if (dev->type && dev->type->pm
+	    && dev->type->pm->runtime_resume) {
+		spin_unlock_irq(&dev->power.lock);
+
+		retval = dev->type->pm->runtime_resume(dev);
+
+		spin_lock_irq(&dev->power.lock);
+		dev->power.runtime_error = retval;
+	} else if (dev->class && dev->class->pm
+	    && dev->class->pm->runtime_resume) {
+		spin_unlock_irq(&dev->power.lock);
+
+		retval = dev->class->pm->runtime_resume(dev);
+
+		spin_lock_irq(&dev->power.lock);
+		dev->power.runtime_error = retval;
 	} else {
 		retval = -ENOSYS;
 	}