lowmem: Security modules can no longer be removed.

The unregister_security() and mod_unreg_security() functions were removed
because the upstream developers believe that it should not be possible to remove
security modules, "It is used only by out-of-tree modules, which are often
binary-only, illegal, abusive of the API and dangerous, e.g.  silently
re-vectoring SELinux."

Signed-off-by: Viktor Rosendahl <viktor.rosendahl@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/security/lowmem.c b/security/lowmem.c
index 939901c..87f6cec 100644 (file)
--- a/security/lowmem.c
+++ b/security/lowmem.c
@@ -291,29 +291,7 @@ static int __init lowmem_init(void)
        return 0;
 }
 
-static void __exit lowmem_exit(void)
-{
-       /* remove ourselves from the security framework */
-       if (secondary) {
-               if (mod_unreg_security(MY_NAME, &lowmem_security_ops))
-                       printk(KERN_ERR MY_NAME ": Failure unregistering "
-                              "with the primary security module.\n");
-       } else {
-               if (unregister_security(&lowmem_security_ops)) {
-                       printk(KERN_ERR MY_NAME ": Failure unregistering "
-                              "with the kernel.\n");
-               }
-       }
-
-       unregister_sysctl_table(lowmem_table_header);
-
-       sysfs_remove_group(kernel_kobj, &lowmem_attr_group);
-
-       printk(KERN_INFO MY_NAME ": Module removed.\n");
-}
-
 module_init(lowmem_init);
-module_exit(lowmem_exit);
 
 MODULE_DESCRIPTION("Low watermark LSM module");
 MODULE_LICENSE("GPL");