init

Makefile

@@ -1,7 +1,5 @@
 obj-m += butterflyfs.o
 
-butterflyfs-objs := ./src/mount.o
-
 all:
 	make -C /lib/modules/$(shell uname -r)/build/ M=$(PWD) modules
 

butterflyfs.c

@@ -1,7 +1,9 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/fs.h>
 
-#include "src/butterfly.h"
+#include "butterfly.h"
 
 static struct file_system_type butterfly_fs = {
     .owner          = THIS_MODULE,
@@ -12,13 +14,31 @@ static struct file_system_type butterfly_fs = {
     .kill_sb        = butterfly_unmount
 };
 
-int init_module()
+struct dentry   *butterfly_mount(
+        struct file_system_type *fs,
+        int flags,
+        const char *devname,
+        void *data)
 {
+    return NULL;
+}
+
+void butterfly_unmount(struct super_block *sb)
+{
+    kill_block_super(sb);
+}
+
+static int __init butterfly_init(void)
+{
+    printk(KERN_INFO "INIT");
     return register_filesystem(&butterfly_fs);
 }
 
-void cleanup_module()
+static void __exit butterfly_cleanup(void)
 {
     unregister_filesystem(&butterfly_fs);
 }
 
+module_init(butterfly_init);
+module_exit(butterfly_cleanup);
+

src/mount.c

@@ -1,16 +0,0 @@
-#include "butterfly.h"
-
-struct dentry   *butterfly_mount(
-        struct file_system_type *fs,
-        int flags,
-        const char *devname,
-        void *data)
-{
-    return NULL;
-}
-
-void butterfly_unmount(struct super_block *sb)
-{
-    kill_block_super(sb);
-}
-