1 files changed, 33 insertions, 154 deletions

diff --git a/drivers/base/node.c b/drivers/base/node.c
index b5a4ba18f9f9..faf3597a96da 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -20,6 +20,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/swap.h>
 #include <linux/slab.h>
+#include <linux/hugetlb.h>
 
 static struct bus_type node_subsys = {
 	.name = "node",
@@ -45,7 +46,7 @@ static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj,
 	return n;
 }
 
-static BIN_ATTR_RO(cpumap, 0);
+static BIN_ATTR_RO(cpumap, CPUMAP_FILE_MAX_BYTES);
 
 static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj,
 				   struct bin_attribute *attr, char *buf,
@@ -66,7 +67,7 @@ static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj,
 	return n;
 }
 
-static BIN_ATTR_RO(cpulist, 0);
+static BIN_ATTR_RO(cpulist, CPULIST_FILE_MAX_BYTES);
 
 /**
  * struct node_access_nodes - Access class device to hold user visible
@@ -433,6 +434,7 @@ static ssize_t node_read_meminfo(struct device *dev,
 			     "Node %d ShadowCallStack:%8lu kB\n"
 #endif
 			     "Node %d PageTables:     %8lu kB\n"
+			     "Node %d SecPageTables:  %8lu kB\n"
 			     "Node %d NFS_Unstable:   %8lu kB\n"
 			     "Node %d Bounce:         %8lu kB\n"
 			     "Node %d WritebackTmp:   %8lu kB\n"
@@ -459,6 +461,7 @@ static ssize_t node_read_meminfo(struct device *dev,
 			     nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
 #endif
 			     nid, K(node_page_state(pgdat, NR_PAGETABLE)),
+			     nid, K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)),
 			     nid, 0UL,
 			     nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
 			     nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
@@ -581,67 +584,15 @@ static const struct attribute_group node_dev_group = {
 
 static const struct attribute_group *node_dev_groups[] = {
 	&node_dev_group,
+#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
+	&arch_node_dev_group,
+#endif
 	NULL
 };
 
-#ifdef CONFIG_HUGETLBFS
-/*
- * hugetlbfs per node attributes registration interface:
- * When/if hugetlb[fs] subsystem initializes [sometime after this module],
- * it will register its per node attributes for all online nodes with
- * memory.  It will also call register_hugetlbfs_with_node(), below, to
- * register its attribute registration functions with this node driver.
- * Once these hooks have been initialized, the node driver will call into
- * the hugetlb module to [un]register attributes for hot-plugged nodes.
- */
-static node_registration_func_t __hugetlb_register_node;
-static node_registration_func_t __hugetlb_unregister_node;
-
-static inline bool hugetlb_register_node(struct node *node)
-{
-	if (__hugetlb_register_node &&
-			node_state(node->dev.id, N_MEMORY)) {
-		__hugetlb_register_node(node);
-		return true;
-	}
-	return false;
-}
-
-static inline void hugetlb_unregister_node(struct node *node)
-{
-	if (__hugetlb_unregister_node)
-		__hugetlb_unregister_node(node);
-}
-
-void register_hugetlbfs_with_node(node_registration_func_t doregister,
-				  node_registration_func_t unregister)
-{
-	__hugetlb_register_node   = doregister;
-	__hugetlb_unregister_node = unregister;
-}
-#else
-static inline void hugetlb_register_node(struct node *node) {}
-
-static inline void hugetlb_unregister_node(struct node *node) {}
-#endif
-
 static void node_device_release(struct device *dev)
 {
-	struct node *node = to_node(dev);
-
-#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_HUGETLBFS)
-	/*
-	 * We schedule the work only when a memory section is
-	 * onlined/offlined on this node. When we come here,
-	 * all the memory on this node has been offlined,
-	 * so we won't enqueue new work to this work.
-	 *
-	 * The work is using node->node_work, so we should
-	 * flush work before freeing the memory.
-	 */
-	flush_work(&node->node_work);
-#endif
-	kfree(node);
+	kfree(to_node(dev));
 }
 
 /*
@@ -660,13 +611,13 @@ static int register_node(struct node *node, int num)
 	node->dev.groups = node_dev_groups;
 	error = device_register(&node->dev);
 
-	if (error)
+	if (error) {
 		put_device(&node->dev);
-	else {
+	} else {
 		hugetlb_register_node(node);
-
 		compaction_register_node(node);
 	}
+
 	return error;
 }
 
@@ -679,7 +630,8 @@ static int register_node(struct node *node, int num)
  */
 void unregister_node(struct node *node)
 {
-	hugetlb_unregister_node(node);		/* no-op, if memoryless node */
+	hugetlb_unregister_node(node);
+	compaction_unregister_node(node);
 	node_remove_accesses(node);
 	node_remove_caches(node);
 	device_unregister(&node->dev);
@@ -793,15 +745,12 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
 }
 
 static void do_register_memory_block_under_node(int nid,
-						struct memory_block *mem_blk)
+						struct memory_block *mem_blk,
+						enum meminit_context context)
 {
 	int ret;
 
-	/*
-	 * If this memory block spans multiple nodes, we only indicate
-	 * the last processed node.
-	 */
-	mem_blk->nid = nid;
+	memory_block_add_nid(mem_blk, nid, context);
 
 	ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
 				       &mem_blk->dev.kobj,
@@ -854,7 +803,7 @@ static int register_mem_block_under_node_early(struct memory_block *mem_blk,
 		if (page_nid != nid)
 			continue;
 
-		do_register_memory_block_under_node(nid, mem_blk);
+		do_register_memory_block_under_node(nid, mem_blk, MEMINIT_EARLY);
 		return 0;
 	}
 	/* mem section does not span the specified node */
@@ -870,7 +819,7 @@ static int register_mem_block_under_node_hotplug(struct memory_block *mem_blk,
 {
 	int nid = *(int *)arg;
 
-	do_register_memory_block_under_node(nid, mem_blk);
+	do_register_memory_block_under_node(nid, mem_blk, MEMINIT_HOTPLUG);
 	return 0;
 }
 
@@ -889,8 +838,9 @@ void unregister_memory_block_under_nodes(struct memory_block *mem_blk)
 			  kobject_name(&node_devices[mem_blk->nid]->dev.kobj));
 }
 
-void link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn,
-		       enum meminit_context context)
+void register_memory_blocks_under_node(int nid, unsigned long start_pfn,
+				       unsigned long end_pfn,
+				       enum meminit_context context)
 {
 	walk_memory_blocks_func_t func;
 
@@ -903,74 +853,8 @@ void link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn,
 			   (void *)&nid, func);
 	return;
 }
-
-#ifdef CONFIG_HUGETLBFS
-/*
- * Handle per node hstate attribute [un]registration on transistions
- * to/from memoryless state.
- */
-static void node_hugetlb_work(struct work_struct *work)
-{
-	struct node *node = container_of(work, struct node, node_work);
-
-	/*
-	 * We only get here when a node transitions to/from memoryless state.
-	 * We can detect which transition occurred by examining whether the
-	 * node has memory now.  hugetlb_register_node() already check this
-	 * so we try to register the attributes.  If that fails, then the
-	 * node has transitioned to memoryless, try to unregister the
-	 * attributes.
-	 */
-	if (!hugetlb_register_node(node))
-		hugetlb_unregister_node(node);
-}
-
-static void init_node_hugetlb_work(int nid)
-{
-	INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work);
-}
-
-static int node_memory_callback(struct notifier_block *self,
-				unsigned long action, void *arg)
-{
-	struct memory_notify *mnb = arg;
-	int nid = mnb->status_change_nid;
-
-	switch (action) {
-	case MEM_ONLINE:
-	case MEM_OFFLINE:
-		/*
-		 * offload per node hstate [un]registration to a work thread
-		 * when transitioning to/from memoryless state.
-		 */
-		if (nid != NUMA_NO_NODE)
-			schedule_work(&node_devices[nid]->node_work);
-		break;
-
-	case MEM_GOING_ONLINE:
-	case MEM_GOING_OFFLINE:
-	case MEM_CANCEL_ONLINE:
-	case MEM_CANCEL_OFFLINE:
-	default:
-		break;
-	}
-
-	return NOTIFY_OK;
-}
-#endif	/* CONFIG_HUGETLBFS */
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
-#if !defined(CONFIG_MEMORY_HOTPLUG) || !defined(CONFIG_HUGETLBFS)
-static inline int node_memory_callback(struct notifier_block *self,
-				unsigned long action, void *arg)
-{
-	return NOTIFY_OK;
-}
-
-static void init_node_hugetlb_work(int nid) { }
-
-#endif
-
 int __register_one_node(int nid)
 {
 	int error;
@@ -989,8 +873,6 @@ int __register_one_node(int nid)
 	}
 
 	INIT_LIST_HEAD(&node_devices[nid]->access_list);
-	/* initialize work queue for memory hot plug */
-	init_node_hugetlb_work(nid);
 	node_init_caches(nid);
 
 	return error;
@@ -1061,27 +943,24 @@ static const struct attribute_group *cpu_root_attr_groups[] = {
 	NULL,
 };
 
-#define NODE_CALLBACK_PRI	2	/* lower than SLAB */
-static int __init register_node_type(void)
+void __init node_dev_init(void)
 {
-	int ret;
+	int ret, i;
 
  	BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES);
  	BUILD_BUG_ON(ARRAY_SIZE(node_state_attrs)-1 != NR_NODE_STATES);
 
 	ret = subsys_system_register(&node_subsys, cpu_root_attr_groups);
-	if (!ret) {
-		static struct notifier_block node_memory_callback_nb = {
-			.notifier_call = node_memory_callback,
-			.priority = NODE_CALLBACK_PRI,
-		};
-		register_hotmemory_notifier(&node_memory_callback_nb);
-	}
+	if (ret)
+		panic("%s() failed to register subsystem: %d\n", __func__, ret);
 
 	/*
-	 * Note:  we're not going to unregister the node class if we fail
-	 * to register the node state class attribute files.
+	 * Create all node devices, which will properly link the node
+	 * to applicable memory block devices and already created cpu devices.
 	 */
-	return ret;
+	for_each_online_node(i) {
+		ret = register_one_node(i);
+		if (ret)
+			panic("%s() failed to add node: %d\n", __func__, ret);
+	}
 }
-postcore_initcall(register_node_type);