Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h
index 482461d..24cfa96 100644
--- a/include/crypto/if_alg.h
+++ b/include/crypto/if_alg.h
@@ -1,13 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * if_alg: User-space algorithm interface
  *
  * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
- *
- * This program 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 of the License, or (at your option)
- * any later version.
- *
  */
 
 #ifndef _CRYPTO_IF_ALG_H
@@ -169,9 +164,6 @@
 
 int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
 void af_alg_free_sg(struct af_alg_sgl *sgl);
-void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
-
-int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
 
 static inline struct alg_sock *alg_sk(struct sock *sk)
 {
@@ -230,15 +222,11 @@
 	return PAGE_SIZE <= af_alg_rcvbuf(sk);
 }
 
-int af_alg_alloc_tsgl(struct sock *sk);
 unsigned int af_alg_count_tsgl(struct sock *sk, size_t bytes, size_t offset);
 void af_alg_pull_tsgl(struct sock *sk, size_t used, struct scatterlist *dst,
 		      size_t dst_offset);
-void af_alg_free_areq_sgls(struct af_alg_async_req *areq);
-int af_alg_wait_for_wmem(struct sock *sk, unsigned int flags);
 void af_alg_wmem_wakeup(struct sock *sk);
 int af_alg_wait_for_data(struct sock *sk, unsigned flags);
-void af_alg_data_wakeup(struct sock *sk);
 int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
 		   unsigned int ivsize);
 ssize_t af_alg_sendpage(struct socket *sock, struct page *page,