diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index b50ac9c7397b..f6dcc8fea5c0 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -55,9 +55,8 @@ static inline void stack_overflow_check(struct pt_regs *regs)
 	    regs->sp <= curbase + THREAD_SIZE)
 		return;
 
-	irq_stack_top = (u64)this_cpu_ptr(irq_stack_union.irq_stack) +
-			STACK_TOP_MARGIN;
 	irq_stack_bottom = (u64)__this_cpu_read(irq_stack_ptr);
+	irq_stack_top = irq_stack_bottom - IRQ_STACK_SIZE + STACK_TOP_MARGIN;
 	if (regs->sp >= irq_stack_top && regs->sp <= irq_stack_bottom)
 		return;