--- 0e8c2a0fd9222d4b75793fb664591de22461e7d7
+++ 271de94c3810d9bbdb2c01bbfbb43f221b46ee24
@@ -23,6 +23,11 @@ static inline void paravirt_release_pud(
 #endif
 
 /*
+ * Flags to use when allocating a user page table page.
+ */
+extern gfp_t __userpte_alloc_gfp;
+
+/*
  * Allocate and free page tables.
  */
 extern pgd_t *pgd_alloc(struct mm_struct *);