LockD: manage grace period per network namespace

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h
index 44c8f0b..94653ae 100644
--- a/fs/lockd/netns.h
+++ b/fs/lockd/netns.h
@@ -7,6 +7,8 @@
 	unsigned int nlmsvc_users;
 	unsigned long next_gc;
 	unsigned long nrhosts;
+
+	struct delayed_work grace_period_end;
 };
 
 extern int lockd_net_id;