[PATCH] sunrpc rmmod oops fix

From: "J. Bruce Fields" <bfields@fieldses.org>

Unregister svcauth_gss caches on exit from gss module; fixes an oops on
rmmod.

include/linux/sunrpc/svcauth_gss.h

@@ -20,6 +20,7 @@
 #include <linux/sunrpc/auth_gss.h>
 
 int gss_svc_init(void);
+void gss_svc_shutdown(void);
 int svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name);
 
 #endif /* __KERNEL__ */

net/sunrpc/auth_gss/auth_gss.c

@@ -984,6 +984,7 @@ static int __init init_rpcsec_gss(void)
 
 static void __exit exit_rpcsec_gss(void)
 {
+	gss_svc_shutdown();
 	gss_mech_unregister_all();
 	rpcauth_unregister(&authgss_ops);
 }

net/sunrpc/auth_gss/svcauth_gss.c

@@ -1063,3 +1063,10 @@ gss_svc_init(void)
 	svc_auth_register(RPC_AUTH_GSS, &svcauthops_gss);
 	return 0;
 }
+
+void
+gss_svc_shutdown(void)
+{
+	cache_unregister(&rsc_cache);
+	cache_unregister(&rsi_cache);
+}