Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c
index 1811fa4..7c48ff4 100644
--- a/arch/x86/lib/cache-smp.c
+++ b/arch/x86/lib/cache-smp.c
@@ -15,6 +15,7 @@
 
 int wbinvd_on_all_cpus(void)
 {
-	return on_each_cpu(__wbinvd, NULL, 1);
+	on_each_cpu(__wbinvd, NULL, 1);
+	return 0;
 }
 EXPORT_SYMBOL(wbinvd_on_all_cpus);