v4.19.13 snapshot.
diff --git a/arch/mips/include/asm/idle.h b/arch/mips/include/asm/idle.h
new file mode 100644
index 0000000..655a6db
--- /dev/null
+++ b/arch/mips/include/asm/idle.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_IDLE_H
+#define __ASM_IDLE_H
+
+#include <linux/cpuidle.h>
+#include <linux/linkage.h>
+
+extern void (*cpu_wait)(void);
+extern void r4k_wait(void);
+extern asmlinkage void __r4k_wait(void);
+extern void r4k_wait_irqoff(void);
+
+static inline int using_rollback_handler(void)
+{
+ return cpu_wait == r4k_wait;
+}
+
+extern int mips_cpuidle_wait_enter(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index);
+
+#define MIPS_CPUIDLE_WAIT_STATE {\
+ .enter = mips_cpuidle_wait_enter,\
+ .exit_latency = 1,\
+ .target_residency = 1,\
+ .power_usage = UINT_MAX,\
+ .name = "wait",\
+ .desc = "MIPS wait",\
+}
+
+#endif /* __ASM_IDLE_H */