--- 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 *);