Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index 7a6d61c..7399eb7 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* IIO - useful set of util functionality
  *
  * Copyright (c) 2008 Jonathan Cameron
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 #include <string.h>
 #include <stdlib.h>
@@ -159,9 +156,9 @@
 			*be = (endianchar == 'b');
 			*bytes = padint / 8;
 			if (*bits_used == 64)
-				*mask = ~0;
+				*mask = ~(0ULL);
 			else
-				*mask = (1ULL << *bits_used) - 1;
+				*mask = (1ULL << *bits_used) - 1ULL;
 
 			*is_signed = (signchar == 's');
 			if (fclose(sysfsfp)) {