CRED: Wrap current->cred and a few other accessors

Wrap current->cred and a few other accessors to hide their actual
implementation.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/selinux/exports.c b/security/selinux/exports.c
index cf02490..c73aeaa 100644
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
@@ -39,9 +39,13 @@
 int selinux_secmark_relabel_packet_permission(u32 sid)
 {
 	if (selinux_enabled) {
-		struct task_security_struct *tsec = current->cred->security;
+		const struct task_security_struct *__tsec;
+		u32 tsid;
 
-		return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
+		__tsec = current_security();
+		tsid = __tsec->sid;
+
+		return avc_has_perm(tsid, sid, SECCLASS_PACKET,
 				    PACKET__RELABELTO, NULL);
 	}
 	return 0;