fops owner

kernel_module/anonymous_inode.c

@@ -66,6 +66,7 @@ static long unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
 }
 
 static const struct file_operations fops_ioctl = {
+	.owner = THIS_MODULE,
 	.unlocked_ioctl = unlocked_ioctl
 };
 

kernel_module/character_device.c

@@ -49,6 +49,7 @@ static ssize_t read(struct file *filp, char __user *buf, size_t len, loff_t *off
 }
 
 static const struct file_operations fops = {
+	.owner = THIS_MODULE,
 	.read = read,
 };
 

kernel_module/fops.c

@@ -129,6 +129,9 @@ static loff_t llseek(struct file *filp, loff_t off, int whence)
 }
 
 static const struct file_operations fops = {
+	/* Prevents rmmod while fops are running.
+	 * Try removing this for poll, which waits a lot. */
+	.owner = THIS_MODULE,
 	.llseek = llseek,
 	.open = open,
 	.read = read,

kernel_module/ioctl.c

@@ -67,6 +67,7 @@ static long unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
 }
 
 static const struct file_operations fops = {
+	.owner = THIS_MODULE,
 	.unlocked_ioctl = unlocked_ioctl
 };
 

kernel_module/poll.c

@@ -65,6 +65,7 @@ static int kthread_func(void *data)
 }
 
 static const struct file_operations fops = {
+	.owner = THIS_MODULE,
 	.read = read,
 	.poll = poll
 };