Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: (62 commits)
  sched: build fix
  sched: better rt-group documentation
  sched: features fix
  sched: /debug/sched_features
  sched: add SCHED_FEAT_DEADLINE
  sched: debug: show a weight tree
  sched: fair: weight calculations
  sched: fair-group: de-couple load-balancing from the rb-trees
  sched: fair-group scheduling vs latency
  sched: rt-group: optimize dequeue_rt_stack
  sched: debug: add some debug code to handle the full hierarchy
  sched: fair-group: SMP-nice for group scheduling
  sched, cpuset: customize sched domains, core
  sched, cpuset: customize sched domains, docs
  sched: prepatory code movement
  sched: rt: multi level group constraints
  sched: task_group hierarchy
  sched: fix the task_group hierarchy for UID grouping
  sched: allow the group scheduler to have multiple levels
  sched: mix tasks and groups
  ...

5 files changed, 17 insertions, 19 deletions

diff --git a/mm/allocpercpu.c b/mm/allocpercpu.c
index b0012e27fea..f4026bae6ee 100644
--- a/mm/allocpercpu.c
+++ b/mm/allocpercpu.c
@@ -82,9 +82,10 @@ EXPORT_SYMBOL_GPL(percpu_populate);
 int __percpu_populate_mask(void *__pdata, size_t size, gfp_t gfp,
 			   cpumask_t *mask)
 {
-	cpumask_t populated = CPU_MASK_NONE;
+	cpumask_t populated;
 	int cpu;
 
+	cpus_clear(populated);
 	for_each_cpu_mask(cpu, *mask)
 		if (unlikely(!percpu_populate(__pdata, size, gfp, cpu))) {
 			__percpu_depopulate_mask(__pdata, &populated);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 402a504f122..32e796af12a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2029,6 +2029,7 @@ static int find_next_best_node(int node, nodemask_t *used_node_mask)
 	int n, val;
 	int min_val = INT_MAX;
 	int best_node = -1;
+	node_to_cpumask_ptr(tmp, 0);
 
 	/* Use the local node if we haven't already */
 	if (!node_isset(node, *used_node_mask)) {
@@ -2037,7 +2038,6 @@ static int find_next_best_node(int node, nodemask_t *used_node_mask)
 	}
 
 	for_each_node_state(n, N_HIGH_MEMORY) {
-		cpumask_t tmp;
 
 		/* Don't want a node to appear more than once */
 		if (node_isset(n, *used_node_mask))
@@ -2050,8 +2050,8 @@ static int find_next_best_node(int node, nodemask_t *used_node_mask)
 		val += (n < node);
 
 		/* Give preference to headless and unused nodes */
-		tmp = node_to_cpumask(n);
-		if (!cpus_empty(tmp))
+		node_to_cpumask_ptr_next(tmp, n);
+		if (!cpus_empty(*tmp))
 			val += PENALTY_FOR_NODE_WITH_CPUS;
 
 		/* Slight preference for less loaded node */
diff --git a/mm/pdflush.c b/mm/pdflush.c
index 8f6ee073c0e..0ceacff5645 100644
--- a/mm/pdflush.c
+++ b/mm/pdflush.c
@@ -187,8 +187,8 @@ static int pdflush(void *dummy)
 	 * This is needed as pdflush's are dynamically created and destroyed.
 	 * The boottime pdflush's are easily placed w/o these 2 lines.
 	 */
-	cpus_allowed = cpuset_cpus_allowed(current);
-	set_cpus_allowed(current, cpus_allowed);
+	cpuset_cpus_allowed(current, &cpus_allowed);
+	set_cpus_allowed_ptr(current, &cpus_allowed);
 
 	return __pdflush(&my_work);
 }
diff --git a/mm/slab.c b/mm/slab.c
index 04b308c3bc5..03927cb5ec9 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1160,14 +1160,13 @@ static void __cpuinit cpuup_canceled(long cpu)
 	struct kmem_cache *cachep;
 	struct kmem_list3 *l3 = NULL;
 	int node = cpu_to_node(cpu);
+	node_to_cpumask_ptr(mask, node);
 
 	list_for_each_entry(cachep, &cache_chain, next) {
 		struct array_cache *nc;
 		struct array_cache *shared;
 		struct array_cache **alien;
-		cpumask_t mask;
 
-		mask = node_to_cpumask(node);
 		/* cpu is dead; no one can alloc from it. */
 		nc = cachep->array[cpu];
 		cachep->array[cpu] = NULL;
@@ -1183,7 +1182,7 @@ static void __cpuinit cpuup_canceled(long cpu)
 		if (nc)
 			free_block(cachep, nc->entry, nc->avail, node);
 
-		if (!cpus_empty(mask)) {
+		if (!cpus_empty(*mask)) {
 			spin_unlock_irq(&l3->list_lock);
 			goto free_array_cache;
 		}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4046434046e..f80a5b7c057 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1647,11 +1647,10 @@ static int kswapd(void *p)
 	struct reclaim_state reclaim_state = {
 		.reclaimed_slab = 0,
 	};
-	cpumask_t cpumask;
+	node_to_cpumask_ptr(cpumask, pgdat->node_id);
 
-	cpumask = node_to_cpumask(pgdat->node_id);
-	if (!cpus_empty(cpumask))
-		set_cpus_allowed(tsk, cpumask);
+	if (!cpus_empty(*cpumask))
+		set_cpus_allowed_ptr(tsk, cpumask);
 	current->reclaim_state = &reclaim_state;
 
 	/*
@@ -1880,17 +1879,16 @@ out:
 static int __devinit cpu_callback(struct notifier_block *nfb,
 				  unsigned long action, void *hcpu)
 {
-	pg_data_t *pgdat;
-	cpumask_t mask;
 	int nid;
 
 	if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN) {
 		for_each_node_state(nid, N_HIGH_MEMORY) {
-			pgdat = NODE_DATA(nid);
-			mask = node_to_cpumask(pgdat->node_id);
-			if (any_online_cpu(mask) != NR_CPUS)
+			pg_data_t *pgdat = NODE_DATA(nid);
+			node_to_cpumask_ptr(mask, pgdat->node_id);
+
+			if (any_online_cpu(*mask) < nr_cpu_ids)
 				/* One of our CPUs online: restore mask */
-				set_cpus_allowed(pgdat->kswapd, mask);
+				set_cpus_allowed_ptr(pgdat->kswapd, mask);
 		}
 	}
 	return NOTIFY_OK;