v4.19.13 snapshot.
diff --git a/arch/sparc/kernel/prom.h b/arch/sparc/kernel/prom.h
new file mode 100644
index 0000000..26a1cca
--- /dev/null
+++ b/arch/sparc/kernel/prom.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PROM_H
+#define __PROM_H
+
+#include <linux/spinlock.h>
+#include <asm/prom.h>
+
+void of_console_init(void);
+
+extern unsigned int prom_early_allocated;
+
+#endif /* __PROM_H */