---
 fs/sysfs/bin.c        |   14 ++++++++++++++
 include/linux/sysfs.h |    2 ++
 2 files changed, 16 insertions(+)

Index: linux/fs/sysfs/bin.c
===================================================================
--- linux.orig/fs/sysfs/bin.c
+++ linux/fs/sysfs/bin.c
@@ -163,6 +163,19 @@ static int release(struct inode * inode,
 	return 0;
 }
 
+static int ioctl(struct inode *i, struct file *f, unsigned cmd,
+		 unsigned long arg)
+{
+	struct dentry *dentry = f->f_dentry;
+	struct bin_attribute *attr = to_bin_attr(dentry);
+	struct kobject *kobj = to_kobj(dentry->d_parent);
+
+	if (!attr->ioctl)
+		return -EINVAL;
+
+	return attr->ioctl(kobj, attr, cmd, arg);
+}
+
 const struct file_operations bin_fops = {
 	.read		= read,
 	.write		= write,
@@ -170,6 +183,7 @@ const struct file_operations bin_fops = 
 	.llseek		= generic_file_llseek,
 	.open		= open,
 	.release	= release,
+	.ioctl		= ioctl,
 };
 
 /**
Index: linux/include/linux/sysfs.h
===================================================================
--- linux.orig/include/linux/sysfs.h
+++ linux/include/linux/sysfs.h
@@ -58,6 +58,8 @@ struct bin_attribute {
 	ssize_t (*write)(struct kobject *, char *, loff_t, size_t);
 	int (*mmap)(struct kobject *, struct bin_attribute *attr,
 		    struct vm_area_struct *vma);
+	int (*ioctl)(struct kobject *, struct bin_attribute *attr,
+			unsigned cmd, unsigned long arg);
 };
 
 struct sysfs_ops {