From: Glauber de Oliveira Costa <gcosta@redhat.com>
Subject: [RHEL5 PATCH] make netfront device permanent (#216249)
Date: Fri, 24 Nov 2006 14:19:21 -0200
Bugzilla: 216249
Message-Id: <20061124161921.GH7171@redhat.com>
Changelog: Xen: make netfront device permanent


Currently, rmmod'ind the xennet driver in a guest leads to a memory
leak, and a system BUG(). (#216249)

I've a patch that is able to avoid the BUG() and "properly" unload the
module. However, the memory leak is still there, and according to
Herbert Xu, it will most probably be until we have support for asynch
grant tables free.

Even if we had such a changeset in time, it'd most probably be too much
intrusive for RHEL GA. The best thing may then be preventing the module
from being unloaded.

Please ACK for inclusion


-- 
Glauber de Oliveira Costa
Red Hat Inc.
"Free as in Freedom"

Index: latest/drivers/xen/netfront/netfront.c
===================================================================
--- latest.orig/drivers/xen/netfront/netfront.c
+++ latest/drivers/xen/netfront/netfront.c
@@ -2127,6 +2127,8 @@ static int __init netif_init(void)
 module_init(netif_init);
 
 
+/* it's currently not sane to remove this driver */
+#if 0
 static void __exit netif_exit(void)
 {
 	if (is_initial_xendomain())
@@ -2137,5 +2139,6 @@ static void __exit netif_exit(void)
 	return xenbus_unregister_driver(&netfront);
 }
 module_exit(netif_exit);
+#endif
 
 MODULE_LICENSE("Dual BSD/GPL");