diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 00263bf..8b1a0ef 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -137,6 +137,16 @@
 	return pte_offset_kernel(pmd, 0);
 }
 
+void __init populate_extra_pte(unsigned long vaddr)
+{
+	int pgd_idx = pgd_index(vaddr);
+	int pmd_idx = pmd_index(vaddr);
+	pmd_t *pmd;
+
+	pmd = one_md_table_init(swapper_pg_dir + pgd_idx);
+	one_page_table_init(pmd + pmd_idx);
+}
+
 static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
 					   unsigned long vaddr, pte_t *lastpte)
 {