v4.19.13 snapshot.
diff --git a/arch/sparc/include/asm/nmi.h b/arch/sparc/include/asm/nmi.h
new file mode 100644
index 0000000..90ee786
--- /dev/null
+++ b/arch/sparc/include/asm/nmi.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NMI_H
+#define __NMI_H
+
+int __init nmi_init(void);
+void perfctr_irq(int irq, struct pt_regs *regs);
+void nmi_adjust_hz(unsigned int new_hz);
+
+extern atomic_t nmi_active;
+
+void arch_touch_nmi_watchdog(void);
+void start_nmi_watchdog(void *unused);
+void stop_nmi_watchdog(void *unused);
+
+#endif /* __NMI_H */