efivarfs: Allow unloading when build as module

[cascardo/linux.git] / fs / efivarfs / super.c

diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index 0a48886..6dad117 100644 (file)
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -236,6 +236,7 @@ static void efivarfs_kill_sb(struct super_block *sb)
 }
 
 static struct file_system_type efivarfs_type = {
+       .owner   = THIS_MODULE,
        .name    = "efivarfs",
        .mount   = efivarfs_mount,
        .kill_sb = efivarfs_kill_sb,
@@ -244,17 +245,23 @@ static struct file_system_type efivarfs_type = {
 static __init int efivarfs_init(void)
 {
        if (!efi_enabled(EFI_RUNTIME_SERVICES))
-               return 0;
+               return -ENODEV;
 
        if (!efivars_kobject())
-               return 0;
+               return -ENODEV;
 
        return register_filesystem(&efivarfs_type);
 }
 
+static __exit void efivarfs_exit(void)
+{
+       unregister_filesystem(&efivarfs_type);
+}
+
 MODULE_AUTHOR("Matthew Garrett, Jeremy Kerr");
 MODULE_DESCRIPTION("EFI Variable Filesystem");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_FS("efivarfs");
 
 module_init(efivarfs_init);
+module_exit(efivarfs_exit);