Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
index 86f034b..823afc4 100644
--- a/include/net/sctp/constants.h
+++ b/include/net/sctp/constants.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* SCTP kernel implementation
  * (C) Copyright IBM Corp. 2001, 2004
  * Copyright (c) 1999-2000 Cisco, Inc.
@@ -6,22 +7,6 @@
  *
  * This file is part of the SCTP kernel implementation
  *
- * This SCTP implementation is free software;
- * you can redistribute it and/or modify it under the terms of
- * the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This SCTP implementation is distributed in the hope that it
- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
- *                 ************************
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU CC; see the file COPYING.  If not, see
- * <http://www.gnu.org/licenses/>.
- *
  * Please send any bug reports or fixes you make to the
  * email address(es):
  *    lksctp developers <linux-sctp@vger.kernel.org>
@@ -71,7 +56,7 @@
 					 SCTP_NUM_AUTH_CHUNK_TYPES)
 
 /* These are the different flavours of event.  */
-enum sctp_event {
+enum sctp_event_type {
 	SCTP_EVENT_T_CHUNK = 1,
 	SCTP_EVENT_T_TIMEOUT,
 	SCTP_EVENT_T_OTHER,
@@ -148,11 +133,6 @@
 #define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA || \
 			       a->chunk_hdr->type == SCTP_CID_I_DATA)
 
-/* Calculate the actual data size in a data chunk */
-#define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end) - \
-				    (unsigned long)(c->chunk_hdr) - \
-				    sctp_datachk_len(&c->asoc->stream)))
-
 /* Internal error codes */
 enum sctp_ierror {
 	SCTP_IERROR_NO_ERROR	        = 0,