diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index a7f36ab1c07d484b0061099db52003207427697f..71094f208673fae2bcff6973bb619f9e6de762f2 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -483,7 +483,6 @@ static inline void _set_gate(int gate, unsigned type, void *addr,
 				0, 0, __KERNEL_CS);			\
 	} while (0)
 
-/* used_vectors is BITMAP for irq is not managed by percpu vector_irq */
 extern unsigned long used_vectors[];
 
 static inline void alloc_system_vector(int vector)
diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index ce991689843f5e85ee3213e76d431bee6ad8fcb7..9958ceea2fa3c7bd3b48571eaf9d35fb82b6afd4 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -42,9 +42,6 @@ extern bool handle_irq(struct irq_desc *desc, struct pt_regs *regs);
 
 extern __visible unsigned int do_IRQ(struct pt_regs *regs);
 
-/* Interrupt vector management */
-extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
-
 extern void init_ISA_irqs(void);
 
 #ifdef CONFIG_X86_LOCAL_APIC