Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 799 deletions

diff --git a/ANDROID_3.4.5/fs/sysfs/file.c b/ANDROID_3.4.5/fs/sysfs/file.c
deleted file mode 100644
index 00012e31..00000000
--- a/ANDROID_3.4.5/fs/sysfs/file.c
+++ /dev/null
@@ -1,799 +0,0 @@
-/*
- * fs/sysfs/file.c - sysfs regular (text) file implementation
- *
- * Copyright (c) 2001-3 Patrick Mochel
- * Copyright (c) 2007 SUSE Linux Products GmbH
- * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
- *
- * This file is released under the GPLv2.
- *
- * Please see Documentation/filesystems/sysfs.txt for more information.
- */
-
-#include <linux/module.h>
-#include <linux/kobject.h>
-#include <linux/kallsyms.h>
-#include <linux/slab.h>
-#include <linux/fsnotify.h>
-#include <linux/namei.h>
-#include <linux/poll.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/limits.h>
-#include <asm/uaccess.h>
-
-#include "sysfs.h"
-
-/*
- * There's one sysfs_buffer for each open file and one
- * sysfs_open_dirent for each sysfs_dirent with one or more open
- * files.
- *
- * filp->private_data points to sysfs_buffer and
- * sysfs_dirent->s_attr.open points to sysfs_open_dirent.  s_attr.open
- * is protected by sysfs_open_dirent_lock.
- */
-static DEFINE_SPINLOCK(sysfs_open_dirent_lock);
-
-struct sysfs_open_dirent {
-	atomic_t		refcnt;
-	atomic_t		event;
-	wait_queue_head_t	poll;
-	struct list_head	buffers; /* goes through sysfs_buffer.list */
-};
-
-struct sysfs_buffer {
-	size_t			count;
-	loff_t			pos;
-	char			* page;
-	const struct sysfs_ops	* ops;
-	struct mutex		mutex;
-	int			needs_read_fill;
-	int			event;
-	struct list_head	list;
-};
-
-/**
- *	fill_read_buffer - allocate and fill buffer from object.
- *	@dentry:	dentry pointer.
- *	@buffer:	data buffer for file.
- *
- *	Allocate @buffer->page, if it hasn't been already, then call the
- *	kobject's show() method to fill the buffer with this attribute's 
- *	data. 
- *	This is called only once, on the file's first read unless an error
- *	is returned.
- */
-static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
-{
-	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
-	struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
-	const struct sysfs_ops * ops = buffer->ops;
-	int ret = 0;
-	ssize_t count;
-
-	if (!buffer->page)
-		buffer->page = (char *) get_zeroed_page(GFP_KERNEL);
-	if (!buffer->page)
-		return -ENOMEM;
-
-	/* need attr_sd for attr and ops, its parent for kobj */
-	if (!sysfs_get_active(attr_sd))
-		return -ENODEV;
-
-	buffer->event = atomic_read(&attr_sd->s_attr.open->event);
-	count = ops->show(kobj, attr_sd->s_attr.attr, buffer->page);
-
-	sysfs_put_active(attr_sd);
-
-	/*
-	 * The code works fine with PAGE_SIZE return but it's likely to
-	 * indicate truncated result or overflow in normal use cases.
-	 */
-	if (count >= (ssize_t)PAGE_SIZE) {
-		print_symbol("fill_read_buffer: %s returned bad count\n",
-			(unsigned long)ops->show);
-		/* Try to struggle along */
-		count = PAGE_SIZE - 1;
-	}
-	if (count >= 0) {
-		buffer->needs_read_fill = 0;
-		buffer->count = count;
-	} else {
-		ret = count;
-	}
-	return ret;
-}
-
-/**
- *	sysfs_read_file - read an attribute. 
- *	@file:	file pointer.
- *	@buf:	buffer to fill.
- *	@count:	number of bytes to read.
- *	@ppos:	starting offset in file.
- *
- *	Userspace wants to read an attribute file. The attribute descriptor
- *	is in the file's ->d_fsdata. The target object is in the directory's
- *	->d_fsdata.
- *
- *	We call fill_read_buffer() to allocate and fill the buffer from the
- *	object's show() method exactly once (if the read is happening from
- *	the beginning of the file). That should fill the entire buffer with
- *	all the data the object has to offer for that attribute.
- *	We then call flush_read_buffer() to copy the buffer to userspace
- *	in the increments specified.
- */
-
-static ssize_t
-sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
-{
-	struct sysfs_buffer * buffer = file->private_data;
-	ssize_t retval = 0;
-
-	mutex_lock(&buffer->mutex);
-	if (buffer->needs_read_fill || *ppos == 0) {
-		retval = fill_read_buffer(file->f_path.dentry,buffer);
-		if (retval)
-			goto out;
-	}
-	pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
-		 __func__, count, *ppos, buffer->page);
-	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
-					 buffer->count);
-out:
-	mutex_unlock(&buffer->mutex);
-	return retval;
-}
-
-/**
- *	fill_write_buffer - copy buffer from userspace.
- *	@buffer:	data buffer for file.
- *	@buf:		data from user.
- *	@count:		number of bytes in @userbuf.
- *
- *	Allocate @buffer->page if it hasn't been already, then
- *	copy the user-supplied buffer into it.
- */
-
-static int 
-fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count)
-{
-	int error;
-
-	if (!buffer->page)
-		buffer->page = (char *)get_zeroed_page(GFP_KERNEL);
-	if (!buffer->page)
-		return -ENOMEM;
-
-	if (count >= PAGE_SIZE)
-		count = PAGE_SIZE - 1;
-	error = copy_from_user(buffer->page,buf,count);
-	buffer->needs_read_fill = 1;
-	/* if buf is assumed to contain a string, terminate it by \0,
-	   so e.g. sscanf() can scan the string easily */
-	buffer->page[count] = 0;
-	return error ? -EFAULT : count;
-}
-
-
-/**
- *	flush_write_buffer - push buffer to kobject.
- *	@dentry:	dentry to the attribute
- *	@buffer:	data buffer for file.
- *	@count:		number of bytes
- *
- *	Get the correct pointers for the kobject and the attribute we're
- *	dealing with, then call the store() method for the attribute, 
- *	passing the buffer that we acquired in fill_write_buffer().
- */
-
-static int
-flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)
-{
-	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
-	struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
-	const struct sysfs_ops * ops = buffer->ops;
-	int rc;
-
-	/* need attr_sd for attr and ops, its parent for kobj */
-	if (!sysfs_get_active(attr_sd))
-		return -ENODEV;
-
-	rc = ops->store(kobj, attr_sd->s_attr.attr, buffer->page, count);
-
-	sysfs_put_active(attr_sd);
-
-	return rc;
-}
-
-
-/**
- *	sysfs_write_file - write an attribute.
- *	@file:	file pointer
- *	@buf:	data to write
- *	@count:	number of bytes
- *	@ppos:	starting offset
- *
- *	Similar to sysfs_read_file(), though working in the opposite direction.
- *	We allocate and fill the data from the user in fill_write_buffer(),
- *	then push it to the kobject in flush_write_buffer().
- *	There is no easy way for us to know if userspace is only doing a partial
- *	write, so we don't support them. We expect the entire buffer to come
- *	on the first write. 
- *	Hint: if you're writing a value, first read the file, modify only the
- *	the value you're changing, then write entire buffer back. 
- */
-
-static ssize_t
-sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
-	struct sysfs_buffer * buffer = file->private_data;
-	ssize_t len;
-
-	mutex_lock(&buffer->mutex);
-	len = fill_write_buffer(buffer, buf, count);
-	if (len > 0)
-		len = flush_write_buffer(file->f_path.dentry, buffer, len);
-	if (len > 0)
-		*ppos += len;
-	mutex_unlock(&buffer->mutex);
-	return len;
-}
-
-/**
- *	sysfs_get_open_dirent - get or create sysfs_open_dirent
- *	@sd: target sysfs_dirent
- *	@buffer: sysfs_buffer for this instance of open
- *
- *	If @sd->s_attr.open exists, increment its reference count;
- *	otherwise, create one.  @buffer is chained to the buffers
- *	list.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- *
- *	RETURNS:
- *	0 on success, -errno on failure.
- */
-static int sysfs_get_open_dirent(struct sysfs_dirent *sd,
-				 struct sysfs_buffer *buffer)
-{
-	struct sysfs_open_dirent *od, *new_od = NULL;
-
- retry:
-	spin_lock_irq(&sysfs_open_dirent_lock);
-
-	if (!sd->s_attr.open && new_od) {
-		sd->s_attr.open = new_od;
-		new_od = NULL;
-	}
-
-	od = sd->s_attr.open;
-	if (od) {
-		atomic_inc(&od->refcnt);
-		list_add_tail(&buffer->list, &od->buffers);
-	}
-
-	spin_unlock_irq(&sysfs_open_dirent_lock);
-
-	if (od) {
-		kfree(new_od);
-		return 0;
-	}
-
-	/* not there, initialize a new one and retry */
-	new_od = kmalloc(sizeof(*new_od), GFP_KERNEL);
-	if (!new_od)
-		return -ENOMEM;
-
-	atomic_set(&new_od->refcnt, 0);
-	atomic_set(&new_od->event, 1);
-	init_waitqueue_head(&new_od->poll);
-	INIT_LIST_HEAD(&new_od->buffers);
-	goto retry;
-}
-
-/**
- *	sysfs_put_open_dirent - put sysfs_open_dirent
- *	@sd: target sysfs_dirent
- *	@buffer: associated sysfs_buffer
- *
- *	Put @sd->s_attr.open and unlink @buffer from the buffers list.
- *	If reference count reaches zero, disassociate and free it.
- *
- *	LOCKING:
- *	None.
- */
-static void sysfs_put_open_dirent(struct sysfs_dirent *sd,
-				  struct sysfs_buffer *buffer)
-{
-	struct sysfs_open_dirent *od = sd->s_attr.open;
-	unsigned long flags;
-
-	spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
-
-	list_del(&buffer->list);
-	if (atomic_dec_and_test(&od->refcnt))
-		sd->s_attr.open = NULL;
-	else
-		od = NULL;
-
-	spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);
-
-	kfree(od);
-}
-
-static int sysfs_open_file(struct inode *inode, struct file *file)
-{
-	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
-	struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
-	struct sysfs_buffer *buffer;
-	const struct sysfs_ops *ops;
-	int error = -EACCES;
-
-	/* need attr_sd for attr and ops, its parent for kobj */
-	if (!sysfs_get_active(attr_sd))
-		return -ENODEV;
-
-	/* every kobject with an attribute needs a ktype assigned */
-	if (kobj->ktype && kobj->ktype->sysfs_ops)
-		ops = kobj->ktype->sysfs_ops;
-	else {
-		WARN(1, KERN_ERR "missing sysfs attribute operations for "
-		       "kobject: %s\n", kobject_name(kobj));
-		goto err_out;
-	}
-
-	/* File needs write support.
-	 * The inode's perms must say it's ok, 
-	 * and we must have a store method.
-	 */
-	if (file->f_mode & FMODE_WRITE) {
-		if (!(inode->i_mode & S_IWUGO) || !ops->store)
-			goto err_out;
-	}
-
-	/* File needs read support.
-	 * The inode's perms must say it's ok, and we there
-	 * must be a show method for it.
-	 */
-	if (file->f_mode & FMODE_READ) {
-		if (!(inode->i_mode & S_IRUGO) || !ops->show)
-			goto err_out;
-	}
-
-	/* No error? Great, allocate a buffer for the file, and store it
-	 * it in file->private_data for easy access.
-	 */
-	error = -ENOMEM;
-	buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL);
-	if (!buffer)
-		goto err_out;
-
-	mutex_init(&buffer->mutex);
-	buffer->needs_read_fill = 1;
-	buffer->ops = ops;
-	file->private_data = buffer;
-
-	/* make sure we have open dirent struct */
-	error = sysfs_get_open_dirent(attr_sd, buffer);
-	if (error)
-		goto err_free;
-
-	/* open succeeded, put active references */
-	sysfs_put_active(attr_sd);
-	return 0;
-
- err_free:
-	kfree(buffer);
- err_out:
-	sysfs_put_active(attr_sd);
-	return error;
-}
-
-static int sysfs_release(struct inode *inode, struct file *filp)
-{
-	struct sysfs_dirent *sd = filp->f_path.dentry->d_fsdata;
-	struct sysfs_buffer *buffer = filp->private_data;
-
-	sysfs_put_open_dirent(sd, buffer);
-
-	if (buffer->page)
-		free_page((unsigned long)buffer->page);
-	kfree(buffer);
-
-	return 0;
-}
-
-/* Sysfs attribute files are pollable.  The idea is that you read
- * the content and then you use 'poll' or 'select' to wait for
- * the content to change.  When the content changes (assuming the
- * manager for the kobject supports notification), poll will
- * return POLLERR|POLLPRI, and select will return the fd whether
- * it is waiting for read, write, or exceptions.
- * Once poll/select indicates that the value has changed, you
- * need to close and re-open the file, or seek to 0 and read again.
- * Reminder: this only works for attributes which actively support
- * it, and it is not possible to test an attribute from userspace
- * to see if it supports poll (Neither 'poll' nor 'select' return
- * an appropriate error code).  When in doubt, set a suitable timeout value.
- */
-static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
-{
-	struct sysfs_buffer * buffer = filp->private_data;
-	struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
-	struct sysfs_open_dirent *od = attr_sd->s_attr.open;
-
-	/* need parent for the kobj, grab both */
-	if (!sysfs_get_active(attr_sd))
-		goto trigger;
-
-	poll_wait(filp, &od->poll, wait);
-
-	sysfs_put_active(attr_sd);
-
-	if (buffer->event != atomic_read(&od->event))
-		goto trigger;
-
-	return DEFAULT_POLLMASK;
-
- trigger:
-	buffer->needs_read_fill = 1;
-	return DEFAULT_POLLMASK|POLLERR|POLLPRI;
-}
-
-void sysfs_notify_dirent(struct sysfs_dirent *sd)
-{
-	struct sysfs_open_dirent *od;
-	unsigned long flags;
-
-	spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
-
-	od = sd->s_attr.open;
-	if (od) {
-		atomic_inc(&od->event);
-		wake_up_interruptible(&od->poll);
-	}
-
-	spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags);
-}
-EXPORT_SYMBOL_GPL(sysfs_notify_dirent);
-
-void sysfs_notify(struct kobject *k, const char *dir, const char *attr)
-{
-	struct sysfs_dirent *sd = k->sd;
-
-	mutex_lock(&sysfs_mutex);
-
-	if (sd && dir)
-		sd = sysfs_find_dirent(sd, NULL, dir);
-	if (sd && attr)
-		sd = sysfs_find_dirent(sd, NULL, attr);
-	if (sd)
-		sysfs_notify_dirent(sd);
-
-	mutex_unlock(&sysfs_mutex);
-}
-EXPORT_SYMBOL_GPL(sysfs_notify);
-
-const struct file_operations sysfs_file_operations = {
-	.read		= sysfs_read_file,
-	.write		= sysfs_write_file,
-	.llseek		= generic_file_llseek,
-	.open		= sysfs_open_file,
-	.release	= sysfs_release,
-	.poll		= sysfs_poll,
-};
-
-int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
-		  const void **pns)
-{
-	struct sysfs_dirent *dir_sd = kobj->sd;
-	const struct sysfs_ops *ops;
-	const void *ns = NULL;
-	int err;
-
-	if (!dir_sd) {
-		WARN(1, KERN_ERR "sysfs: kobject %s without dirent\n",
-			kobject_name(kobj));
-		return -ENOENT;
-	}
-
-	err = 0;
-	if (!sysfs_ns_type(dir_sd))
-		goto out;
-
-	err = -EINVAL;
-	if (!kobj->ktype)
-		goto out;
-	ops = kobj->ktype->sysfs_ops;
-	if (!ops)
-		goto out;
-	if (!ops->namespace)
-		goto out;
-
-	err = 0;
-	ns = ops->namespace(kobj, attr);
-out:
-	if (err) {
-		WARN(1, KERN_ERR "missing sysfs namespace attribute operation for "
-		     "kobject: %s\n", kobject_name(kobj));
-	}
-	*pns = ns;
-	return err;
-}
-
-int sysfs_add_file_mode(struct sysfs_dirent *dir_sd,
-			const struct attribute *attr, int type, umode_t amode)
-{
-	umode_t mode = (amode & S_IALLUGO) | S_IFREG;
-	struct sysfs_addrm_cxt acxt;
-	struct sysfs_dirent *sd;
-	const void *ns;
-	int rc;
-
-	rc = sysfs_attr_ns(dir_sd->s_dir.kobj, attr, &ns);
-	if (rc)
-		return rc;
-
-	sd = sysfs_new_dirent(attr->name, mode, type);
-	if (!sd)
-		return -ENOMEM;
-
-	sd->s_ns = ns;
-	sd->s_attr.attr = (void *)attr;
-	sysfs_dirent_init_lockdep(sd);
-
-	sysfs_addrm_start(&acxt, dir_sd);
-	rc = sysfs_add_one(&acxt, sd);
-	sysfs_addrm_finish(&acxt);
-
-	if (rc)
-		sysfs_put(sd);
-
-	return rc;
-}
-
-
-int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
-		   int type)
-{
-	return sysfs_add_file_mode(dir_sd, attr, type, attr->mode);
-}
-
-
-/**
- *	sysfs_create_file - create an attribute file for an object.
- *	@kobj:	object we're creating for. 
- *	@attr:	attribute descriptor.
- */
-
-int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
-{
-	BUG_ON(!kobj || !kobj->sd || !attr);
-
-	return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR);
-
-}
-
-int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
-{
-	int err = 0;
-	int i;
-
-	for (i = 0; ptr[i] && !err; i++)
-		err = sysfs_create_file(kobj, ptr[i]);
-	if (err)
-		while (--i >= 0)
-			sysfs_remove_file(kobj, ptr[i]);
-	return err;
-}
-
-/**
- * sysfs_add_file_to_group - add an attribute file to a pre-existing group.
- * @kobj: object we're acting for.
- * @attr: attribute descriptor.
- * @group: group name.
- */
-int sysfs_add_file_to_group(struct kobject *kobj,
-		const struct attribute *attr, const char *group)
-{
-	struct sysfs_dirent *dir_sd;
-	int error;
-
-	if (group)
-		dir_sd = sysfs_get_dirent(kobj->sd, NULL, group);
-	else
-		dir_sd = sysfs_get(kobj->sd);
-
-	if (!dir_sd)
-		return -ENOENT;
-
-	error = sysfs_add_file(dir_sd, attr, SYSFS_KOBJ_ATTR);
-	sysfs_put(dir_sd);
-
-	return error;
-}
-EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
-
-/**
- * sysfs_chmod_file - update the modified mode value on an object attribute.
- * @kobj: object we're acting for.
- * @attr: attribute descriptor.
- * @mode: file permissions.
- *
- */
-int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr,
-		     umode_t mode)
-{
-	struct sysfs_dirent *sd;
-	struct iattr newattrs;
-	const void *ns;
-	int rc;
-
-	rc = sysfs_attr_ns(kobj, attr, &ns);
-	if (rc)
-		return rc;
-
-	mutex_lock(&sysfs_mutex);
-
-	rc = -ENOENT;
-	sd = sysfs_find_dirent(kobj->sd, ns, attr->name);
-	if (!sd)
-		goto out;
-
-	newattrs.ia_mode = (mode & S_IALLUGO) | (sd->s_mode & ~S_IALLUGO);
-	newattrs.ia_valid = ATTR_MODE;
-	rc = sysfs_sd_setattr(sd, &newattrs);
-
- out:
-	mutex_unlock(&sysfs_mutex);
-	return rc;
-}
-EXPORT_SYMBOL_GPL(sysfs_chmod_file);
-
-
-/**
- *	sysfs_remove_file - remove an object attribute.
- *	@kobj:	object we're acting for.
- *	@attr:	attribute descriptor.
- *
- *	Hash the attribute name and kill the victim.
- */
-
-void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
-{
-	const void *ns;
-
-	if (sysfs_attr_ns(kobj, attr, &ns))
-		return;
-
-	sysfs_hash_and_remove(kobj->sd, ns, attr->name);
-}
-
-void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
-{
-	int i;
-	for (i = 0; ptr[i]; i++)
-		sysfs_remove_file(kobj, ptr[i]);
-}
-
-/**
- * sysfs_remove_file_from_group - remove an attribute file from a group.
- * @kobj: object we're acting for.
- * @attr: attribute descriptor.
- * @group: group name.
- */
-void sysfs_remove_file_from_group(struct kobject *kobj,
-		const struct attribute *attr, const char *group)
-{
-	struct sysfs_dirent *dir_sd;
-
-	if (group)
-		dir_sd = sysfs_get_dirent(kobj->sd, NULL, group);
-	else
-		dir_sd = sysfs_get(kobj->sd);
-	if (dir_sd) {
-		sysfs_hash_and_remove(dir_sd, NULL, attr->name);
-		sysfs_put(dir_sd);
-	}
-}
-EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group);
-
-struct sysfs_schedule_callback_struct {
-	struct list_head	workq_list;
-	struct kobject		*kobj;
-	void			(*func)(void *);
-	void			*data;
-	struct module		*owner;
-	struct work_struct	work;
-};
-
-static struct workqueue_struct *sysfs_workqueue;
-static DEFINE_MUTEX(sysfs_workq_mutex);
-static LIST_HEAD(sysfs_workq);
-static void sysfs_schedule_callback_work(struct work_struct *work)
-{
-	struct sysfs_schedule_callback_struct *ss = container_of(work,
-			struct sysfs_schedule_callback_struct, work);
-
-	(ss->func)(ss->data);
-	kobject_put(ss->kobj);
-	module_put(ss->owner);
-	mutex_lock(&sysfs_workq_mutex);
-	list_del(&ss->workq_list);
-	mutex_unlock(&sysfs_workq_mutex);
-	kfree(ss);
-}
-
-/**
- * sysfs_schedule_callback - helper to schedule a callback for a kobject
- * @kobj: object we're acting for.
- * @func: callback function to invoke later.
- * @data: argument to pass to @func.
- * @owner: module owning the callback code
- *
- * sysfs attribute methods must not unregister themselves or their parent
- * kobject (which would amount to the same thing).  Attempts to do so will
- * deadlock, since unregistration is mutually exclusive with driver
- * callbacks.
- *
- * Instead methods can call this routine, which will attempt to allocate
- * and schedule a workqueue request to call back @func with @data as its
- * argument in the workqueue's process context.  @kobj will be pinned
- * until @func returns.
- *
- * Returns 0 if the request was submitted, -ENOMEM if storage could not
- * be allocated, -ENODEV if a reference to @owner isn't available,
- * -EAGAIN if a callback has already been scheduled for @kobj.
- */
-int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
-		void *data, struct module *owner)
-{
-	struct sysfs_schedule_callback_struct *ss, *tmp;
-
-	if (!try_module_get(owner))
-		return -ENODEV;
-
-	mutex_lock(&sysfs_workq_mutex);
-	list_for_each_entry_safe(ss, tmp, &sysfs_workq, workq_list)
-		if (ss->kobj == kobj) {
-			module_put(owner);
-			mutex_unlock(&sysfs_workq_mutex);
-			return -EAGAIN;
-		}
-	mutex_unlock(&sysfs_workq_mutex);
-
-	if (sysfs_workqueue == NULL) {
-		sysfs_workqueue = create_singlethread_workqueue("sysfsd");
-		if (sysfs_workqueue == NULL) {
-			module_put(owner);
-			return -ENOMEM;
-		}
-	}
-
-	ss = kmalloc(sizeof(*ss), GFP_KERNEL);
-	if (!ss) {
-		module_put(owner);
-		return -ENOMEM;
-	}
-	kobject_get(kobj);
-	ss->kobj = kobj;
-	ss->func = func;
-	ss->data = data;
-	ss->owner = owner;
-	INIT_WORK(&ss->work, sysfs_schedule_callback_work);
-	INIT_LIST_HEAD(&ss->workq_list);
-	mutex_lock(&sysfs_workq_mutex);
-	list_add_tail(&ss->workq_list, &sysfs_workq);
-	mutex_unlock(&sysfs_workq_mutex);
-	queue_work(sysfs_workqueue, &ss->work);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
-
-
-EXPORT_SYMBOL_GPL(sysfs_create_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_files);
-EXPORT_SYMBOL_GPL(sysfs_create_files);