diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 039867558ed43f9e513c1549b514363cef1a35de..023b4a9fc8465e3c643824582d9d77124a2150b3 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -55,7 +55,6 @@ extern struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info);
 
 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
-extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent);
 extern struct irq_domain *
 arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
 
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 0e6618e2e5898f6e7fd05328b606fd7346f87d2a..d79dc2afa5363b6cf7aa14925207a08faf95b69a 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -180,12 +180,6 @@ struct irq_domain *arch_create_remap_msi_irq_domain(struct irq_domain *parent,
 	irq_domain_free_fwnode(fn);
 	return d;
 }
-
-struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent)
-{
-	return pci_msi_create_irq_domain(NULL, &pci_msi_ir_domain_info, parent);
-}
-
 #endif
 
 #ifdef CONFIG_DMAR_TABLE