#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/kthread.h>
kref_init(&new_ct->ref);
list_add(&new_ct->link, &wf_controls);
+ sysfs_attr_init(&new_ct->attr.attr);
new_ct->attr.attr.name = new_ct->name;
new_ct->attr.attr.mode = 0644;
new_ct->attr.show = wf_show_control;