+extern void mpol_rebind_task(struct task_struct *tsk,
+ const nodemask_t *new);
+extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
+extern void mpol_fix_fork_child_flag(struct task_struct *p);
+
+extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
+ unsigned long addr, gfp_t gfp_flags,
+ struct mempolicy **mpol, nodemask_t **nodemask);
+extern bool init_nodemask_of_mempolicy(nodemask_t *mask);
+extern unsigned slab_node(struct mempolicy *policy);
+
+extern enum zone_type policy_zone;
+
+static inline void check_highest_zone(enum zone_type k)
+{
+ if (k > policy_zone && k != ZONE_MOVABLE)
+ policy_zone = k;
+}
+
+int do_migrate_pages(struct mm_struct *mm,
+ const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags);
+
+
+#ifdef CONFIG_TMPFS
+extern int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context);
+
+extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
+ int no_context);
+#endif
+
+/* Check if a vma is migratable */
+static inline int vma_migratable(struct vm_area_struct *vma)
+{
+ if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
+ return 0;
+ /*
+ * Migration allocates pages in the highest zone. If we cannot
+ * do so then migration (at least from node to node) is not
+ * possible.
+ */
+ if (vma->vm_file &&
+ gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
+ < policy_zone)
+ return 0;
+ return 1;
+}