--- zzzz-none-000/linux-3.10.107/arch/x86/include/asm/i8259.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/x86/include/asm/i8259.h	2021-02-04 17:41:59.000000000 +0000
@@ -60,6 +60,7 @@
 	void (*mask_all)(void);
 	void (*restore_mask)(void);
 	void (*init)(int auto_eoi);
+	int (*probe)(void);
 	int (*irq_pending)(unsigned int irq);
 	void (*make_irq)(unsigned int irq);
 };
@@ -67,4 +68,9 @@
 extern struct legacy_pic *legacy_pic;
 extern struct legacy_pic null_legacy_pic;
 
+static inline int nr_legacy_irqs(void)
+{
+	return legacy_pic->nr_legacy_irqs;
+}
+
 #endif /* _ASM_X86_I8259_H */