hibernate: Disable in a signed modules environment

BugLink: http://bugs.launchpad.net/bugs/1566221

There is currently no way to verify the resume image when returning
from hibernate.  This might compromise the signed modules trust model,
so until we can work with signed hibernate images we disable it in
a secure modules environment.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

kernel/power/hibernate.c

@@ -29,6 +29,7 @@
 #include <linux/ctype.h>
 #include <linux/genhd.h>
 #include <linux/ktime.h>
+#include <linux/module.h>
 #include <trace/events/power.h>
 
 #include "power.h"
@@ -66,7 +67,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
 
 bool hibernation_available(void)
 {
-	return (nohibernate == 0);
+	return ((nohibernate == 0) && !secure_modules());
 }
 
 /**