From fe4cbf0f49d96cd2278740b08c1da0c9f0db2514 Mon Sep 17 00:00:00 2001
From: Ciro Santilli <ciro.santilli@gmail.com>
Date: Fri, 16 Jun 2017 08:13:52 +0100
Subject: [PATCH] fops owner

---
 bibliography.md                  | 1 +
 kernel_module/anonymous_inode.c  | 1 +
 kernel_module/character_device.c | 1 +
 kernel_module/fops.c             | 3 +++
 kernel_module/ioctl.c            | 1 +
 kernel_module/poll.c             | 1 +
 6 files changed, 8 insertions(+)

diff --git a/bibliography.md b/bibliography.md
index 5e8e09b..a6e64f2 100644
--- a/bibliography.md
+++ b/bibliography.md
@@ -4,3 +4,4 @@
 - <https://github.com/agelastic/eudyptula>
 - <https://lwn.net>
 - <http://www.makelinux.net>
+- <http://nairobi-embedded.org/> you will fall here a lot when the hard Google queries start popping
diff --git a/kernel_module/anonymous_inode.c b/kernel_module/anonymous_inode.c
index 3b962c9..77eb7ef 100644
--- a/kernel_module/anonymous_inode.c
+++ b/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
 };
 
diff --git a/kernel_module/character_device.c b/kernel_module/character_device.c
index 14b7448..3587499 100644
--- a/kernel_module/character_device.c
+++ b/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,
 };
 
diff --git a/kernel_module/fops.c b/kernel_module/fops.c
index d7c5c6d..c309df9 100644
--- a/kernel_module/fops.c
+++ b/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,
diff --git a/kernel_module/ioctl.c b/kernel_module/ioctl.c
index aead6b4..378a385 100644
--- a/kernel_module/ioctl.c
+++ b/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
 };
 
diff --git a/kernel_module/poll.c b/kernel_module/poll.c
index 38e80e1..6f34a7c 100644
--- a/kernel_module/poll.c
+++ b/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
 };