diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 1f6ff9c..d59b1e7 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -113,58 +113,6 @@
 static void mpol_rebind_policy(struct mempolicy *pol,
                                const nodemask_t *newmask);
 
-/* Do sanity checking on a policy */
-static int mpol_check_policy(unsigned short mode, nodemask_t *nodes)
-{
-	int was_empty, is_empty;
-
-	if (!nodes)
-		return 0;
-
-	/*
-	 * "Contextualize" the in-coming nodemast for cpusets:
-	 * Remember whether in-coming nodemask was empty,  If not,
-	 * restrict the nodes to the allowed nodes in the cpuset.
-	 * This is guaranteed to be a subset of nodes with memory.
-	 */
-	cpuset_update_task_memory_state();
-	is_empty = was_empty = nodes_empty(*nodes);
-	if (!was_empty) {
-		nodes_and(*nodes, *nodes, cpuset_current_mems_allowed);
-		is_empty = nodes_empty(*nodes);	/* after "contextualization" */
-	}
-
-	switch (mode) {
-	case MPOL_DEFAULT:
-		/*
-		 * require caller to specify an empty nodemask
-		 * before "contextualization"
-		 */
-		if (!was_empty)
-			return -EINVAL;
-		break;
-	case MPOL_BIND:
-	case MPOL_INTERLEAVE:
-		/*
-		 * require at least 1 valid node after "contextualization"
-		 */
-		if (is_empty)
-			return -EINVAL;
-		break;
-	case MPOL_PREFERRED:
-		/*
-		 * Did caller specify invalid nodes?
-		 * Don't silently accept this as "local allocation".
-		 */
-		if (!was_empty && is_empty)
-			return -EINVAL;
-		break;
-	default:
-		BUG();
-	}
-	return 0;
-}
-
 /* Check that the nodemask contains at least one populated zone */
 static int is_valid_nodemask(nodemask_t *nodemask)
 {
@@ -186,48 +134,60 @@
 	return 0;
 }
 
+static inline int mpol_store_user_nodemask(const struct mempolicy *pol)
+{
+	return pol->flags & MPOL_F_STATIC_NODES;
+}
+
 /* Create a new policy */
 static struct mempolicy *mpol_new(unsigned short mode, unsigned short flags,
 				  nodemask_t *nodes)
 {
 	struct mempolicy *policy;
+	nodemask_t cpuset_context_nmask;
 
 	pr_debug("setting mode %d flags %d nodes[0] %lx\n",
 		 mode, flags, nodes ? nodes_addr(*nodes)[0] : -1);
 
 	if (mode == MPOL_DEFAULT)
-		return NULL;
+		return (nodes && nodes_weight(*nodes)) ? ERR_PTR(-EINVAL) :
+							 NULL;
 	policy = kmem_cache_alloc(policy_cache, GFP_KERNEL);
 	if (!policy)
 		return ERR_PTR(-ENOMEM);
 	atomic_set(&policy->refcnt, 1);
+	cpuset_update_task_memory_state();
+	nodes_and(cpuset_context_nmask, *nodes, cpuset_current_mems_allowed);
 	switch (mode) {
 	case MPOL_INTERLEAVE:
-		policy->v.nodes = *nodes;
-		if (nodes_weight(policy->v.nodes) == 0) {
-			kmem_cache_free(policy_cache, policy);
-			return ERR_PTR(-EINVAL);
-		}
+		if (nodes_empty(*nodes) || nodes_empty(cpuset_context_nmask))
+			goto free;
+		policy->v.nodes = cpuset_context_nmask;
 		break;
 	case MPOL_PREFERRED:
-		policy->v.preferred_node = first_node(*nodes);
+		policy->v.preferred_node = first_node(cpuset_context_nmask);
 		if (policy->v.preferred_node >= MAX_NUMNODES)
-			policy->v.preferred_node = -1;
+			goto free;
 		break;
 	case MPOL_BIND:
-		if (!is_valid_nodemask(nodes)) {
-			kmem_cache_free(policy_cache, policy);
-			return ERR_PTR(-EINVAL);
-		}
-		policy->v.nodes = *nodes;
+		if (!is_valid_nodemask(&cpuset_context_nmask))
+			goto free;
+		policy->v.nodes = cpuset_context_nmask;
 		break;
 	default:
 		BUG();
 	}
 	policy->policy = mode;
 	policy->flags = flags;
-	policy->cpuset_mems_allowed = cpuset_mems_allowed(current);
+	if (mpol_store_user_nodemask(policy))
+		policy->w.user_nodemask = *nodes;
+	else
+		policy->w.cpuset_mems_allowed = cpuset_mems_allowed(current);
 	return policy;
+
+free:
+	kmem_cache_free(policy_cache, policy);
+	return ERR_PTR(-EINVAL);
 }
 
 static void gather_stats(struct page *, void *, int pte_dirty);
@@ -473,15 +433,14 @@
 {
 	struct mempolicy *new;
 
-	if (mpol_check_policy(mode, nodes))
-		return -EINVAL;
 	new = mpol_new(mode, flags, nodes);
 	if (IS_ERR(new))
 		return PTR_ERR(new);
 	mpol_free(current->mempolicy);
 	current->mempolicy = new;
 	mpol_set_task_struct_flag();
-	if (new && new->policy == MPOL_INTERLEAVE)
+	if (new && new->policy == MPOL_INTERLEAVE &&
+	    nodes_weight(new->v.nodes))
 		current->il_next = first_node(new->v.nodes);
 	return 0;
 }
@@ -796,9 +755,6 @@
 	if (end == start)
 		return 0;
 
-	if (mpol_check_policy(mode, nmask))
-		return -EINVAL;
-
 	new = mpol_new(mode, mode_flags, nmask);
 	if (IS_ERR(new))
 		return PTR_ERR(new);
@@ -1206,7 +1162,8 @@
 	next = next_node(nid, policy->v.nodes);
 	if (next >= MAX_NUMNODES)
 		next = first_node(policy->v.nodes);
-	me->il_next = next;
+	if (next < MAX_NUMNODES)
+		me->il_next = next;
 	return nid;
 }
 
@@ -1252,10 +1209,13 @@
 		struct vm_area_struct *vma, unsigned long off)
 {
 	unsigned nnodes = nodes_weight(pol->v.nodes);
-	unsigned target = (unsigned)off % nnodes;
+	unsigned target;
 	int c;
 	int nid = -1;
 
+	if (!nnodes)
+		return numa_node_id();
+	target = (unsigned int)off % nnodes;
 	c = 0;
 	do {
 		nid = next_node(nid, pol->v.nodes);
@@ -1465,6 +1425,16 @@
 	return new;
 }
 
+static int mpol_match_intent(const struct mempolicy *a,
+			     const struct mempolicy *b)
+{
+	if (a->flags != b->flags)
+		return 0;
+	if (!mpol_store_user_nodemask(a))
+		return 1;
+	return nodes_equal(a->w.user_nodemask, b->w.user_nodemask);
+}
+
 /* Slow path of a mempolicy comparison */
 int __mpol_equal(struct mempolicy *a, struct mempolicy *b)
 {
@@ -1472,6 +1442,8 @@
 		return 0;
 	if (a->policy != b->policy)
 		return 0;
+	if (a->policy != MPOL_DEFAULT && !mpol_match_intent(a, b))
+		return 0;
 	switch (a->policy) {
 	case MPOL_DEFAULT:
 		return 1;
@@ -1771,13 +1743,14 @@
 static void mpol_rebind_policy(struct mempolicy *pol,
 			       const nodemask_t *newmask)
 {
-	nodemask_t *mpolmask;
 	nodemask_t tmp;
+	int static_nodes;
 
 	if (!pol)
 		return;
-	mpolmask = &pol->cpuset_mems_allowed;
-	if (nodes_equal(*mpolmask, *newmask))
+	static_nodes = pol->flags & MPOL_F_STATIC_NODES;
+	if (!mpol_store_user_nodemask(pol) &&
+	    nodes_equal(pol->w.cpuset_mems_allowed, *newmask))
 		return;
 
 	switch (pol->policy) {
@@ -1786,16 +1759,35 @@
 	case MPOL_BIND:
 		/* Fall through */
 	case MPOL_INTERLEAVE:
-		nodes_remap(tmp, pol->v.nodes, *mpolmask, *newmask);
+		if (static_nodes)
+			nodes_and(tmp, pol->w.user_nodemask, *newmask);
+		else {
+			nodes_remap(tmp, pol->v.nodes,
+				    pol->w.cpuset_mems_allowed, *newmask);
+			pol->w.cpuset_mems_allowed = *newmask;
+		}
 		pol->v.nodes = tmp;
-		*mpolmask = *newmask;
-		current->il_next = node_remap(current->il_next,
-						*mpolmask, *newmask);
+		if (!node_isset(current->il_next, tmp)) {
+			current->il_next = next_node(current->il_next, tmp);
+			if (current->il_next >= MAX_NUMNODES)
+				current->il_next = first_node(tmp);
+			if (current->il_next >= MAX_NUMNODES)
+				current->il_next = numa_node_id();
+		}
 		break;
 	case MPOL_PREFERRED:
-		pol->v.preferred_node = node_remap(pol->v.preferred_node,
-						*mpolmask, *newmask);
-		*mpolmask = *newmask;
+		if (static_nodes) {
+			int node = first_node(pol->w.user_nodemask);
+
+			if (node_isset(node, *newmask))
+				pol->v.preferred_node = node;
+			else
+				pol->v.preferred_node = -1;
+		} else {
+			pol->v.preferred_node = node_remap(pol->v.preferred_node,
+					pol->w.cpuset_mems_allowed, *newmask);
+			pol->w.cpuset_mems_allowed = *newmask;
+		}
 		break;
 	default:
 		BUG();
@@ -1847,6 +1839,7 @@
 	int l;
 	nodemask_t nodes;
 	unsigned short mode = pol ? pol->policy : MPOL_DEFAULT;
+	unsigned short flags = pol ? pol->flags : 0;
 
 	switch (mode) {
 	case MPOL_DEFAULT:
@@ -1876,6 +1869,17 @@
 	strcpy(p, policy_types[mode]);
 	p += l;
 
+	if (flags) {
+		int need_bar = 0;
+
+		if (buffer + maxlen < p + 2)
+			return -ENOSPC;
+		*p++ = '=';
+
+		if (flags & MPOL_F_STATIC_NODES)
+			p += sprintf(p, "%sstatic", need_bar++ ? "|" : "");
+	}
+
 	if (!nodes_empty(nodes)) {
 		if (buffer + maxlen < p + 2)
 			return -ENOSPC;