Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/tests/kmod-path.c b/tools/perf/tests/kmod-path.c
index 0579a70..e483210 100644
--- a/tools/perf/tests/kmod-path.c
+++ b/tools/perf/tests/kmod-path.c
@@ -1,9 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <stdlib.h>
+#include <string.h>
 #include "tests.h"
 #include "dso.h"
 #include "debug.h"
+#include "event.h"
 
 static int test(const char *path, bool alloc_name, bool kmod,
 		int comp, const char *name)