--- zzzz-none-000/linux-3.10.107/arch/arm/include/asm/delay.h	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/arm/include/asm/delay.h	2021-11-10 11:53:52.000000000 +0000
@@ -66,6 +66,9 @@
 #define ARCH_HAS_READ_CURRENT_TIMER
 extern void register_current_timer_delay(const struct delay_timer *timer);
 
+extern void set_delay_fn(void (*fn)(unsigned long));
+extern void read_current_timer_delay_loop(unsigned long loops);
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* defined(_ARM_DELAY_H) */