Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/kernel/elf.c b/arch/mips/kernel/elf.c
index 731325a..7b045d2 100644
--- a/arch/mips/kernel/elf.c
+++ b/arch/mips/kernel/elf.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (C) 2014 Imagination Technologies
  * Author: Paul Burton <paul.burton@mips.com>
- *
- * 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.
  */
 
 #include <linux/binfmts.h>
@@ -16,6 +12,8 @@
 #include <asm/cpu-features.h>
 #include <asm/cpu-info.h>
 
+#ifdef CONFIG_MIPS_FP_SUPPORT
+
 /* Whether to accept legacy-NaN and 2008-NaN user binaries.  */
 bool mips_use_nan_legacy;
 bool mips_use_nan_2008;
@@ -326,6 +324,8 @@
 	}
 }
 
+#endif /* CONFIG_MIPS_FP_SUPPORT */
+
 int mips_elf_read_implies_exec(void *elf_ex, int exstack)
 {
 	if (exstack != EXSTACK_DISABLE_X) {