1 files changed, 24 insertions, 4 deletions

diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 1cc966cd3e5f..31ac26ca4acf 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -23,6 +23,13 @@ enum {
         MPOL_MAX,       /* always last member of enum */
 };
 
+enum mpol_rebind_step {
+        MPOL_REBIND_ONCE,       /* do rebind work at once(not by two step) */
+        MPOL_REBIND_STEP1,      /* first step(set all the newly nodes) */
+        MPOL_REBIND_STEP2,      /* second step(clean all the disallowed nodes)*/
+        MPOL_REBIND_NSTEP,
+};
+
 /* Flags for set_mempolicy */
 #define MPOL_F_STATIC_NODES     (1 << 15)
 #define MPOL_F_RELATIVE_NODES   (1 << 14)
@@ -51,6 +58,7 @@ enum {
  */
 #define MPOL_F_SHARED  (1 << 0) /* identify shared policies */
 #define MPOL_F_LOCAL   (1 << 1) /* preferred local allocation */
+#define MPOL_F_REBINDING (1 << 2)       /* identify policies in rebinding */
 
 #ifdef __KERNEL__
 
@@ -193,8 +201,8 @@ struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp,
 
 extern void numa_default_policy(void);
 extern void numa_policy_init(void);
-extern void mpol_rebind_task(struct task_struct *tsk,
-                                        const nodemask_t *new);
+extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new,
+                                enum mpol_rebind_step step);
 extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
 extern void mpol_fix_fork_child_flag(struct task_struct *p);
 
@@ -202,6 +210,8 @@ 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 bool mempolicy_nodemask_intersects(struct task_struct *tsk,
+                                const nodemask_t *mask);
 extern unsigned slab_node(struct mempolicy *policy);
 
 extern enum zone_type policy_zone;
@@ -308,7 +318,8 @@ static inline void numa_default_policy(void)
 }
 
 static inline void mpol_rebind_task(struct task_struct *tsk,
-                                        const nodemask_t *new)
+                                const nodemask_t *new,
+                                enum mpol_rebind_step step)
 {
 }
 
@@ -329,7 +340,16 @@ static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
         return node_zonelist(0, gfp_flags);
 }
 
-static inline bool init_nodemask_of_mempolicy(nodemask_t *m) { return false; }
+static inline bool init_nodemask_of_mempolicy(nodemask_t *m)
+{
+        return false;
+}
+
+static inline bool mempolicy_nodemask_intersects(struct task_struct *tsk,
+                        const nodemask_t *mask)
+{
+        return false;
+}
 
 static inline int do_migrate_pages(struct mm_struct *mm,
                         const nodemask_t *from_nodes,