Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/scripts/atomic/fallbacks/set_release b/scripts/atomic/fallbacks/set_release
new file mode 100755
index 0000000..45bb5e0
--- /dev/null
+++ b/scripts/atomic/fallbacks/set_release
@@ -0,0 +1,7 @@
+cat <<EOF
+static inline void
+${atomic}_set_release(${atomic}_t *v, ${int} i)
+{
+	smp_store_release(&(v)->counter, i);
+}
+EOF