diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 944de9aaa0cd5260e65b48857c7b96d7c2609784..e788c589941502f10a4dd8fea5996c970bf11d70 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -431,6 +431,7 @@ void iounmap(volatile void __iomem *addr)
 }
 EXPORT_SYMBOL(iounmap);
 
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
 bool arch_vmap_p4d_supported(pgprot_t prot)
 {
 	return false;
@@ -449,6 +450,7 @@ bool arch_vmap_pmd_supported(pgprot_t prot)
 {
 	return boot_cpu_has(X86_FEATURE_PSE);
 }
+#endif
 
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem