--- arch/x86/include/asm/pgalloc.h
+++ arch/x86/include/asm/pgalloc.h
@@ -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 *);