74 static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)  in fill_read_buffer()  argument
78 	struct sysfs_ops * ops = buffer->ops;  in fill_read_buffer()
82 	if (!buffer->page)  in fill_read_buffer()
83 		buffer->page = (char *) get_zeroed_page(GFP_KERNEL);  in fill_read_buffer()
84 	if (!buffer->page)  in fill_read_buffer()
91 	buffer->event = atomic_read(&attr_sd->s_attr.open->event);  in fill_read_buffer()
92 	count = ops->show(kobj, attr_sd->s_attr.attr, buffer->page);  in fill_read_buffer()
107 		buffer->needs_read_fill = 0;  in fill_read_buffer()
108 		buffer->count = count;  in fill_read_buffer()
137 	struct sysfs_buffer * buffer = file->private_data;  in sysfs_read_file()  local
140 	mutex_lock(&buffer->mutex);  in sysfs_read_file()
141 	if (buffer->needs_read_fill || *ppos == 0) {  in sysfs_read_file()
142 		retval = fill_read_buffer(file->f_path.dentry,buffer);  in sysfs_read_file()
147 		 __func__, count, *ppos, buffer->page);  in sysfs_read_file()
148 	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,  in sysfs_read_file()
149 					 buffer->count);  in sysfs_read_file()
151 	mutex_unlock(&buffer->mutex);  in sysfs_read_file()
166 fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count)  in fill_write_buffer()  argument
170 	if (!buffer->page)  in fill_write_buffer()
171 		buffer->page = (char *)get_zeroed_page(GFP_KERNEL);  in fill_write_buffer()
172 	if (!buffer->page)  in fill_write_buffer()
177 	error = copy_from_user(buffer->page,buf,count);  in fill_write_buffer()
178 	buffer->needs_read_fill = 1;  in fill_write_buffer()
181 	buffer->page[count] = 0;  in fill_write_buffer()
198 flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)  in flush_write_buffer()  argument
202 	struct sysfs_ops * ops = buffer->ops;  in flush_write_buffer()
209 	rc = ops->store(kobj, attr_sd->s_attr.attr, buffer->page, count);  in flush_write_buffer()
237 	struct sysfs_buffer * buffer = file->private_data;  in sysfs_write_file()  local
240 	mutex_lock(&buffer->mutex);  in sysfs_write_file()
241 	len = fill_write_buffer(buffer, buf, count);  in sysfs_write_file()
243 		len = flush_write_buffer(file->f_path.dentry, buffer, len);  in sysfs_write_file()
246 	mutex_unlock(&buffer->mutex);  in sysfs_write_file()
266 				 struct sysfs_buffer *buffer)  in sysfs_get_open_dirent()  argument
281 		list_add_tail(&buffer->list, &od->buffers);  in sysfs_get_open_dirent()
315 				  struct sysfs_buffer *buffer)  in sysfs_put_open_dirent()  argument
321 	list_del(&buffer->list);  in sysfs_put_open_dirent()
336 	struct sysfs_buffer *buffer;  in sysfs_open_file()  local
380 	buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL);  in sysfs_open_file()
381 	if (!buffer)  in sysfs_open_file()
384 	mutex_init(&buffer->mutex);  in sysfs_open_file()
385 	buffer->needs_read_fill = 1;  in sysfs_open_file()
386 	buffer->ops = ops;  in sysfs_open_file()
387 	file->private_data = buffer;  in sysfs_open_file()
390 	error = sysfs_get_open_dirent(attr_sd, buffer);  in sysfs_open_file()
399 	kfree(buffer);  in sysfs_open_file()
408 	struct sysfs_buffer *buffer = filp->private_data;  in sysfs_release()  local
410 	sysfs_put_open_dirent(sd, buffer);  in sysfs_release()
412 	if (buffer->page)  in sysfs_release()
413 		free_page((unsigned long)buffer->page);  in sysfs_release()
414 	kfree(buffer);  in sysfs_release()
434 	struct sysfs_buffer * buffer = filp->private_data;  in sysfs_poll()  local
446 	if (buffer->event != atomic_read(&od->event))  in sysfs_poll()
452 	buffer->needs_read_fill = 1;  in sysfs_poll()