how do I access drvdata registered with device_create from my char ioctl
 

I am creating a device: device_create(my_char_cl, NULL, MKDEV(my_char_major, 0),
private, "mydev%d", 0);
and passing in a pointer "private". How do I access this pointer from my ioctl:

static long my_char_ioctl(struct file *f, unsigned int cmd,
unsigned long arg)
{
...
The ioctl works fine, I just need to get access to the drvdata passed into device_create.