Merge tag 'v3.3-rc7' into x86/mce

Merge reason: Update from an ancient -rc1 base to an almost-final stable kernel.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

7 files changed, 74 insertions, 392 deletions

diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 2c8272dd93c4..610f9997a403 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -1,6 +1,6 @@
 # Makefile for the Linux device tree
 
-obj-y			:= core.o sys.o bus.o dd.o syscore.o \
+obj-y			:= core.o bus.o dd.o syscore.o \
 			   driver.o class.o platform.o \
 			   cpu.o firmware.o init.o map.o devres.o \
 			   attribute_container.o transport_class.o \
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 4a67cc0c8b37..74dda4f697f9 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -632,6 +632,11 @@ static void klist_children_put(struct klist_node *n)
  * may be used for reference counting of @dev after calling this
  * function.
  *
+ * All fields in @dev must be initialized by the caller to 0, except
+ * for those explicitly set to some other value.  The simplest
+ * approach is to use kzalloc() to allocate the structure containing
+ * @dev.
+ *
  * NOTE: Use put_device() to give up your reference instead of freeing
  * @dev directly once you have called this function.
  */
@@ -930,6 +935,13 @@ int device_private_init(struct device *dev)
  * to the global and sibling lists for the device, then
  * adds it to the other relevant subsystems of the driver model.
  *
+ * Do not call this routine or device_register() more than once for
+ * any device structure.  The driver model core is not designed to work
+ * with devices that get unregistered and then spring back to life.
+ * (Among other things, it's very hard to guarantee that all references
+ * to the previous incarnation of @dev have been dropped.)  Allocate
+ * and register a fresh new struct device instead.
+ *
  * NOTE: _Never_ directly free @dev after calling this function, even
  * if it returned an error! Always use put_device() to give up your
  * reference instead.
@@ -1022,7 +1034,7 @@ int device_add(struct device *dev)
 	device_pm_add(dev);
 
 	/* Notify clients of device addition.  This call must come
-	 * after dpm_sysf_add() and before kobject_uevent().
+	 * after dpm_sysfs_add() and before kobject_uevent().
 	 */
 	if (dev->bus)
 		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
@@ -1090,6 +1102,9 @@ name_error:
  * have a clearly defined need to use and refcount the device
  * before it is added to the hierarchy.
  *
+ * For more information, see the kerneldoc for device_initialize()
+ * and device_add().
+ *
  * NOTE: _Never_ directly free @dev after calling this function, even
  * if it returned an error! Always use put_device() to give up the
  * reference initialized in this function instead.
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index db87e78d7459..4dabf5077c48 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -208,6 +208,25 @@ static ssize_t print_cpus_offline(struct device *dev,
 }
 static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
 
+static void cpu_device_release(struct device *dev)
+{
+	/*
+	 * This is an empty function to prevent the driver core from spitting a
+	 * warning at us.  Yes, I know this is directly opposite of what the
+	 * documentation for the driver core and kobjects say, and the author
+	 * of this code has already been publically ridiculed for doing
+	 * something as foolish as this.  However, at this point in time, it is
+	 * the only way to handle the issue of statically allocated cpu
+	 * devices.  The different architectures will have their cpu device
+	 * code reworked to properly handle this in the near future, so this
+	 * function will then be changed to correctly free up the memory held
+	 * by the cpu device.
+	 *
+	 * Never copy this way of doing things, or you too will be made fun of
+	 * on the linux-kerenl list, you have been warned.
+	 */
+}
+
 /*
  * register_cpu - Setup a sysfs device for a CPU.
  * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
@@ -221,8 +240,10 @@ int __cpuinit register_cpu(struct cpu *cpu, int num)
 	int error;
 
 	cpu->node_id = cpu_to_node(num);
+	memset(&cpu->dev, 0x00, sizeof(struct device));
 	cpu->dev.id = num;
 	cpu->dev.bus = &cpu_subsys;
+	cpu->dev.release = cpu_device_release;
 	error = device_register(&cpu->dev);
 	if (!error && cpu->hotpluggable)
 		register_cpu_control(cpu);
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 9b3a71e391f4..7dda4f790f00 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -572,19 +572,36 @@ static int init_memory_block(struct memory_block **memory,
 }
 
 static int add_memory_section(int nid, struct mem_section *section,
+			struct memory_block **mem_p,
 			unsigned long state, enum mem_add_context context)
 {
-	struct memory_block *mem;
+	struct memory_block *mem = NULL;
+	int scn_nr = __section_nr(section);
 	int ret = 0;
 
 	mutex_lock(&mem_sysfs_mutex);
 
-	mem = find_memory_block(section);
+	if (context == BOOT) {
+		/* same memory block ? */
+		if (mem_p && *mem_p)
+			if (scn_nr >= (*mem_p)->start_section_nr &&
+			    scn_nr <= (*mem_p)->end_section_nr) {
+				mem = *mem_p;
+				kobject_get(&mem->dev.kobj);
+			}
+	} else
+		mem = find_memory_block(section);
+
 	if (mem) {
 		mem->section_count++;
 		kobject_put(&mem->dev.kobj);
-	} else
+	} else {
 		ret = init_memory_block(&mem, section, state);
+		/* store memory_block pointer for next loop */
+		if (!ret && context == BOOT)
+			if (mem_p)
+				*mem_p = mem;
+	}
 
 	if (!ret) {
 		if (context == HOTPLUG &&
@@ -627,7 +644,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
  */
 int register_new_memory(int nid, struct mem_section *section)
 {
-	return add_memory_section(nid, section, MEM_OFFLINE, HOTPLUG);
+	return add_memory_section(nid, section, NULL, MEM_OFFLINE, HOTPLUG);
 }
 
 int unregister_memory_section(struct mem_section *section)
@@ -647,6 +664,7 @@ int __init memory_dev_init(void)
 	int ret;
 	int err;
 	unsigned long block_sz;
+	struct memory_block *mem = NULL;
 
 	ret = subsys_system_register(&memory_subsys, NULL);
 	if (ret)
@@ -662,7 +680,10 @@ int __init memory_dev_init(void)
 	for (i = 0; i < NR_MEM_SECTIONS; i++) {
 		if (!present_section_nr(i))
 			continue;
-		err = add_memory_section(0, __nr_to_section(i), MEM_ONLINE,
+		/* don't need to reuse memory_block if only one per block */
+		err = add_memory_section(0, __nr_to_section(i),
+				 (sections_per_block == 1) ? NULL : &mem,
+					 MEM_ONLINE,
 					 BOOT);
 		if (!ret)
 			ret = err;
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 44f427a66117..90aa2a11a933 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -456,7 +456,15 @@ static int link_mem_sections(int nid)
 		if (!present_section_nr(section_nr))
 			continue;
 		mem_sect = __nr_to_section(section_nr);
+
+		/* same memblock ? */
+		if (mem_blk)
+			if ((section_nr >= mem_blk->start_section_nr) &&
+			    (section_nr <= mem_blk->end_section_nr))
+				continue;
+
 		mem_blk = find_memory_block_hinted(mem_sect, mem_blk);
+
 		ret = register_mem_sect_under_node(mem_blk, nid);
 		if (!err)
 			err = ret;
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 1ead66186b7c..d1daa5e9fadf 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -53,7 +53,7 @@ static int regcache_hw_init(struct regmap *map)
 	for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++) {
 		val = regcache_get_val(map->reg_defaults_raw,
 				       i, map->cache_word_size);
-		if (!val)
+		if (regmap_volatile(map, i))
 			continue;
 		count++;
 	}
@@ -70,7 +70,7 @@ static int regcache_hw_init(struct regmap *map)
 	for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {
 		val = regcache_get_val(map->reg_defaults_raw,
 				       i, map->cache_word_size);
-		if (!val)
+		if (regmap_volatile(map, i))
 			continue;
 		map->reg_defaults[j].reg = i;
 		map->reg_defaults[j].def = val;
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
deleted file mode 100644
index 409f5ce78829..000000000000
--- a/drivers/base/sys.c
+++ /dev/null
@@ -1,383 +0,0 @@
-/*
- * sys.c - pseudo-bus for system 'devices' (cpus, PICs, timers, etc)
- *
- * Copyright (c) 2002-3 Patrick Mochel
- *               2002-3 Open Source Development Lab
- *
- * This file is released under the GPLv2
- *
- * This exports a 'system' bus type.
- * By default, a 'sys' bus gets added to the root of the system. There will
- * always be core system devices. Devices can use sysdev_register() to
- * add themselves as children of the system bus.
- */
-
-#include <linux/sysdev.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/pm.h>
-#include <linux/device.h>
-#include <linux/mutex.h>
-#include <linux/interrupt.h>
-
-#include "base.h"
-
-#define to_sysdev(k) container_of(k, struct sys_device, kobj)
-#define to_sysdev_attr(a) container_of(a, struct sysdev_attribute, attr)
-
-
-static ssize_t
-sysdev_show(struct kobject *kobj, struct attribute *attr, char *buffer)
-{
-	struct sys_device *sysdev = to_sysdev(kobj);
-	struct sysdev_attribute *sysdev_attr = to_sysdev_attr(attr);
-
-	if (sysdev_attr->show)
-		return sysdev_attr->show(sysdev, sysdev_attr, buffer);
-	return -EIO;
-}
-
-
-static ssize_t
-sysdev_store(struct kobject *kobj, struct attribute *attr,
-	     const char *buffer, size_t count)
-{
-	struct sys_device *sysdev = to_sysdev(kobj);
-	struct sysdev_attribute *sysdev_attr = to_sysdev_attr(attr);
-
-	if (sysdev_attr->store)
-		return sysdev_attr->store(sysdev, sysdev_attr, buffer, count);
-	return -EIO;
-}
-
-static const struct sysfs_ops sysfs_ops = {
-	.show	= sysdev_show,
-	.store	= sysdev_store,
-};
-
-static struct kobj_type ktype_sysdev = {
-	.sysfs_ops	= &sysfs_ops,
-};
-
-
-int sysdev_create_file(struct sys_device *s, struct sysdev_attribute *a)
-{
-	return sysfs_create_file(&s->kobj, &a->attr);
-}
-
-
-void sysdev_remove_file(struct sys_device *s, struct sysdev_attribute *a)
-{
-	sysfs_remove_file(&s->kobj, &a->attr);
-}
-
-EXPORT_SYMBOL_GPL(sysdev_create_file);
-EXPORT_SYMBOL_GPL(sysdev_remove_file);
-
-#define to_sysdev_class(k) container_of(k, struct sysdev_class, kset.kobj)
-#define to_sysdev_class_attr(a) container_of(a, \
-	struct sysdev_class_attribute, attr)
-
-static ssize_t sysdev_class_show(struct kobject *kobj, struct attribute *attr,
-				 char *buffer)
-{
-	struct sysdev_class *class = to_sysdev_class(kobj);
-	struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr);
-
-	if (class_attr->show)
-		return class_attr->show(class, class_attr, buffer);
-	return -EIO;
-}
-
-static ssize_t sysdev_class_store(struct kobject *kobj, struct attribute *attr,
-				  const char *buffer, size_t count)
-{
-	struct sysdev_class *class = to_sysdev_class(kobj);
-	struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr);
-
-	if (class_attr->store)
-		return class_attr->store(class, class_attr, buffer, count);
-	return -EIO;
-}
-
-static const struct sysfs_ops sysfs_class_ops = {
-	.show	= sysdev_class_show,
-	.store	= sysdev_class_store,
-};
-
-static struct kobj_type ktype_sysdev_class = {
-	.sysfs_ops	= &sysfs_class_ops,
-};
-
-int sysdev_class_create_file(struct sysdev_class *c,
-			     struct sysdev_class_attribute *a)
-{
-	return sysfs_create_file(&c->kset.kobj, &a->attr);
-}
-EXPORT_SYMBOL_GPL(sysdev_class_create_file);
-
-void sysdev_class_remove_file(struct sysdev_class *c,
-			      struct sysdev_class_attribute *a)
-{
-	sysfs_remove_file(&c->kset.kobj, &a->attr);
-}
-EXPORT_SYMBOL_GPL(sysdev_class_remove_file);
-
-extern struct kset *system_kset;
-
-int sysdev_class_register(struct sysdev_class *cls)
-{
-	int retval;
-
-	pr_debug("Registering sysdev class '%s'\n", cls->name);
-
-	INIT_LIST_HEAD(&cls->drivers);
-	memset(&cls->kset.kobj, 0x00, sizeof(struct kobject));
-	cls->kset.kobj.parent = &system_kset->kobj;
-	cls->kset.kobj.ktype = &ktype_sysdev_class;
-	cls->kset.kobj.kset = system_kset;
-
-	retval = kobject_set_name(&cls->kset.kobj, "%s", cls->name);
-	if (retval)
-		return retval;
-
-	retval = kset_register(&cls->kset);
-	if (!retval && cls->attrs)
-		retval = sysfs_create_files(&cls->kset.kobj,
-					    (const struct attribute **)cls->attrs);
-	return retval;
-}
-
-void sysdev_class_unregister(struct sysdev_class *cls)
-{
-	pr_debug("Unregistering sysdev class '%s'\n",
-		 kobject_name(&cls->kset.kobj));
-	if (cls->attrs)
-		sysfs_remove_files(&cls->kset.kobj,
-				   (const struct attribute **)cls->attrs);
-	kset_unregister(&cls->kset);
-}
-
-EXPORT_SYMBOL_GPL(sysdev_class_register);
-EXPORT_SYMBOL_GPL(sysdev_class_unregister);
-
-static DEFINE_MUTEX(sysdev_drivers_lock);
-
-/*
- * @dev != NULL means that we're unwinding because some drv->add()
- * failed for some reason. You need to grab sysdev_drivers_lock before
- * calling this.
- */
-static void __sysdev_driver_remove(struct sysdev_class *cls,
-				   struct sysdev_driver *drv,
-				   struct sys_device *from_dev)
-{
-	struct sys_device *dev = from_dev;
-
-	list_del_init(&drv->entry);
-	if (!cls)
-		return;
-
-	if (!drv->remove)
-		goto kset_put;
-
-	if (dev)
-		list_for_each_entry_continue_reverse(dev, &cls->kset.list,
-						     kobj.entry)
-			drv->remove(dev);
-	else
-		list_for_each_entry(dev, &cls->kset.list, kobj.entry)
-			drv->remove(dev);
-
-kset_put:
-	kset_put(&cls->kset);
-}
-
-/**
- *	sysdev_driver_register - Register auxiliary driver
- *	@cls:	Device class driver belongs to.
- *	@drv:	Driver.
- *
- *	@drv is inserted into @cls->drivers to be
- *	called on each operation on devices of that class. The refcount
- *	of @cls is incremented.
- */
-int sysdev_driver_register(struct sysdev_class *cls, struct sysdev_driver *drv)
-{
-	struct sys_device *dev = NULL;
-	int err = 0;
-
-	if (!cls) {
-		WARN(1, KERN_WARNING "sysdev: invalid class passed to %s!\n",
-			__func__);
-		return -EINVAL;
-	}
-
-	/* Check whether this driver has already been added to a class. */
-	if (drv->entry.next && !list_empty(&drv->entry))
-		WARN(1, KERN_WARNING "sysdev: class %s: driver (%p) has already"
-			" been registered to a class, something is wrong, but "
-			"will forge on!\n", cls->name, drv);
-
-	mutex_lock(&sysdev_drivers_lock);
-	if (cls && kset_get(&cls->kset)) {
-		list_add_tail(&drv->entry, &cls->drivers);
-
-		/* If devices of this class already exist, tell the driver */
-		if (drv->add) {
-			list_for_each_entry(dev, &cls->kset.list, kobj.entry) {
-				err = drv->add(dev);
-				if (err)
-					goto unwind;
-			}
-		}
-	} else {
-		err = -EINVAL;
-		WARN(1, KERN_ERR "%s: invalid device class\n", __func__);
-	}
-
-	goto unlock;
-
-unwind:
-	__sysdev_driver_remove(cls, drv, dev);
-
-unlock:
-	mutex_unlock(&sysdev_drivers_lock);
-	return err;
-}
-
-/**
- *	sysdev_driver_unregister - Remove an auxiliary driver.
- *	@cls:	Class driver belongs to.
- *	@drv:	Driver.
- */
-void sysdev_driver_unregister(struct sysdev_class *cls,
-			      struct sysdev_driver *drv)
-{
-	mutex_lock(&sysdev_drivers_lock);
-	__sysdev_driver_remove(cls, drv, NULL);
-	mutex_unlock(&sysdev_drivers_lock);
-}
-EXPORT_SYMBOL_GPL(sysdev_driver_register);
-EXPORT_SYMBOL_GPL(sysdev_driver_unregister);
-
-/**
- *	sysdev_register - add a system device to the tree
- *	@sysdev:	device in question
- *
- */
-int sysdev_register(struct sys_device *sysdev)
-{
-	int error;
-	struct sysdev_class *cls = sysdev->cls;
-
-	if (!cls)
-		return -EINVAL;
-
-	pr_debug("Registering sys device of class '%s'\n",
-		 kobject_name(&cls->kset.kobj));
-
-	/* initialize the kobject to 0, in case it had previously been used */
-	memset(&sysdev->kobj, 0x00, sizeof(struct kobject));
-
-	/* Make sure the kset is set */
-	sysdev->kobj.kset = &cls->kset;
-
-	/* Register the object */
-	error = kobject_init_and_add(&sysdev->kobj, &ktype_sysdev, NULL,
-				     "%s%d", kobject_name(&cls->kset.kobj),
-				     sysdev->id);
-
-	if (!error) {
-		struct sysdev_driver *drv;
-
-		pr_debug("Registering sys device '%s'\n",
-			 kobject_name(&sysdev->kobj));
-
-		mutex_lock(&sysdev_drivers_lock);
-		/* Generic notification is implicit, because it's that
-		 * code that should have called us.
-		 */
-
-		/* Notify class auxiliary drivers */
-		list_for_each_entry(drv, &cls->drivers, entry) {
-			if (drv->add)
-				drv->add(sysdev);
-		}
-		mutex_unlock(&sysdev_drivers_lock);
-		kobject_uevent(&sysdev->kobj, KOBJ_ADD);
-	}
-
-	return error;
-}
-
-void sysdev_unregister(struct sys_device *sysdev)
-{
-	struct sysdev_driver *drv;
-
-	mutex_lock(&sysdev_drivers_lock);
-	list_for_each_entry(drv, &sysdev->cls->drivers, entry) {
-		if (drv->remove)
-			drv->remove(sysdev);
-	}
-	mutex_unlock(&sysdev_drivers_lock);
-
-	kobject_put(&sysdev->kobj);
-}
-
-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,
-			   struct sysdev_attribute *attr,
-			   const char *buf, size_t size)
-{
-	struct sysdev_ext_attribute *ea = to_ext_attr(attr);
-	char *end;
-	unsigned long new = simple_strtoul(buf, &end, 0);
-	if (end == buf)
-		return -EINVAL;
-	*(unsigned long *)(ea->var) = new;
-	/* Always return full write size even if we didn't consume all */
-	return size;
-}
-EXPORT_SYMBOL_GPL(sysdev_store_ulong);
-
-ssize_t sysdev_show_ulong(struct sys_device *sysdev,
-			  struct sysdev_attribute *attr,
-			  char *buf)
-{
-	struct sysdev_ext_attribute *ea = to_ext_attr(attr);
-	return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var));
-}
-EXPORT_SYMBOL_GPL(sysdev_show_ulong);
-
-ssize_t sysdev_store_int(struct sys_device *sysdev,
-			   struct sysdev_attribute *attr,
-			   const char *buf, size_t size)
-{
-	struct sysdev_ext_attribute *ea = to_ext_attr(attr);
-	char *end;
-	long new = simple_strtol(buf, &end, 0);
-	if (end == buf || new > INT_MAX || new < INT_MIN)
-		return -EINVAL;
-	*(int *)(ea->var) = new;
-	/* Always return full write size even if we didn't consume all */
-	return size;
-}
-EXPORT_SYMBOL_GPL(sysdev_store_int);
-
-ssize_t sysdev_show_int(struct sys_device *sysdev,
-			  struct sysdev_attribute *attr,
-			  char *buf)
-{
-	struct sysdev_ext_attribute *ea = to_ext_attr(attr);
-	return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var));
-}
-EXPORT_SYMBOL_GPL(sysdev_show_int);
-