[mirror_ubuntu-zesty-kernel.git] / drivers / base / node.c

/*
 * drivers/base/node.c - basic Node class support
 */

#include <linux/sysdev.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/node.h>
#include <linux/hugetlb.h>
#include <linux/cpumask.h>
#include <linux/topology.h>
#include <linux/nodemask.h>
#include <linux/cpu.h>
#include <linux/device.h>

static struct sysdev_class node_class = {
	.name = "node",
};


static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf)
{
	struct node *node_dev = to_node(dev);
	node_to_cpumask_ptr(mask, node_dev->sysdev.id);
	int len;

	/* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
	BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));

	len = type?
		cpulist_scnprintf(buf, PAGE_SIZE-2, *mask):
		cpumask_scnprintf(buf, PAGE_SIZE-2, *mask);
 	buf[len++] = '\n';
 	buf[len] = '\0';
	return len;
}

static inline ssize_t node_read_cpumask(struct sys_device *dev, char *buf)
{
	return node_read_cpumap(dev, 0, buf);
}
static inline ssize_t node_read_cpulist(struct sys_device *dev, char *buf)
{
	return node_read_cpumap(dev, 1, buf);
}

static SYSDEV_ATTR(cpumap,  S_IRUGO, node_read_cpumask, NULL);
static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);

#define K(x) ((x) << (PAGE_SHIFT - 10))
static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
{
	int n;
	int nid = dev->id;
	struct sysinfo i;

	si_meminfo_node(&i, nid);

	n = sprintf(buf, "\n"
		       "Node %d MemTotal:     %8lu kB\n"
		       "Node %d MemFree:      %8lu kB\n"
		       "Node %d MemUsed:      %8lu kB\n"
		       "Node %d Active:       %8lu kB\n"
		       "Node %d Inactive:     %8lu kB\n"
#ifdef CONFIG_HIGHMEM
		       "Node %d HighTotal:    %8lu kB\n"
		       "Node %d HighFree:     %8lu kB\n"
		       "Node %d LowTotal:     %8lu kB\n"
		       "Node %d LowFree:      %8lu kB\n"
#endif
		       "Node %d Dirty:        %8lu kB\n"
		       "Node %d Writeback:    %8lu kB\n"
		       "Node %d FilePages:    %8lu kB\n"
		       "Node %d Mapped:       %8lu kB\n"
		       "Node %d AnonPages:    %8lu kB\n"
		       "Node %d PageTables:   %8lu kB\n"
		       "Node %d NFS_Unstable: %8lu kB\n"
		       "Node %d Bounce:       %8lu kB\n"
		       "Node %d WritebackTmp: %8lu kB\n"
		       "Node %d Slab:         %8lu kB\n"
		       "Node %d SReclaimable: %8lu kB\n"
		       "Node %d SUnreclaim:   %8lu kB\n",
		       nid, K(i.totalram),
		       nid, K(i.freeram),
		       nid, K(i.totalram - i.freeram),
		       nid, node_page_state(nid, NR_ACTIVE),
		       nid, node_page_state(nid, NR_INACTIVE),
#ifdef CONFIG_HIGHMEM
		       nid, K(i.totalhigh),
		       nid, K(i.freehigh),
		       nid, K(i.totalram - i.totalhigh),
		       nid, K(i.freeram - i.freehigh),
#endif
		       nid, K(node_page_state(nid, NR_FILE_DIRTY)),
		       nid, K(node_page_state(nid, NR_WRITEBACK)),
		       nid, K(node_page_state(nid, NR_FILE_PAGES)),
		       nid, K(node_page_state(nid, NR_FILE_MAPPED)),
		       nid, K(node_page_state(nid, NR_ANON_PAGES)),
		       nid, K(node_page_state(nid, NR_PAGETABLE)),
		       nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
		       nid, K(node_page_state(nid, NR_BOUNCE)),
		       nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)),
		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
				node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
	n += hugetlb_report_node_meminfo(nid, buf + n);
	return n;
}

#undef K
static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);

static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
{
	return sprintf(buf,
		       "numa_hit %lu\n"
		       "numa_miss %lu\n"
		       "numa_foreign %lu\n"
		       "interleave_hit %lu\n"
		       "local_node %lu\n"
		       "other_node %lu\n",
		       node_page_state(dev->id, NUMA_HIT),
		       node_page_state(dev->id, NUMA_MISS),
		       node_page_state(dev->id, NUMA_FOREIGN),
		       node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
		       node_page_state(dev->id, NUMA_LOCAL),
		       node_page_state(dev->id, NUMA_OTHER));
}
static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);

static ssize_t node_read_distance(struct sys_device * dev, char * buf)
{
	int nid = dev->id;
	int len = 0;
	int i;

	/* buf currently PAGE_SIZE, need ~4 chars per node */
	BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);

	for_each_online_node(i)
		len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));

	len += sprintf(buf + len, "\n");
	return len;
}
static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);


/*
 * register_node - Setup a sysfs device for a node.
 * @num - Node number to use when creating the device.
 *
 * Initialize and register the node device.
 */
int register_node(struct node *node, int num, struct node *parent)
{
	int error;

	node->sysdev.id = num;
	node->sysdev.cls = &node_class;
	error = sysdev_register(&node->sysdev);

	if (!error){
		sysdev_create_file(&node->sysdev, &attr_cpumap);
		sysdev_create_file(&node->sysdev, &attr_cpulist);
		sysdev_create_file(&node->sysdev, &attr_meminfo);
		sysdev_create_file(&node->sysdev, &attr_numastat);
		sysdev_create_file(&node->sysdev, &attr_distance);
	}
	return error;
}

/**
 * unregister_node - unregister a node device
 * @node: node going away
 *
 * Unregisters a node device @node.  All the devices on the node must be
 * unregistered before calling this function.
 */
void unregister_node(struct node *node)
{
	sysdev_remove_file(&node->sysdev, &attr_cpumap);
	sysdev_remove_file(&node->sysdev, &attr_cpulist);
	sysdev_remove_file(&node->sysdev, &attr_meminfo);
	sysdev_remove_file(&node->sysdev, &attr_numastat);
	sysdev_remove_file(&node->sysdev, &attr_distance);

	sysdev_unregister(&node->sysdev);
}

struct node node_devices[MAX_NUMNODES];

/*
 * register cpu under node
 */
int register_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	if (node_online(nid)) {
		struct sys_device *obj = get_cpu_sysdev(cpu);
		if (!obj)
			return 0;
		return sysfs_create_link(&node_devices[nid].sysdev.kobj,
					 &obj->kobj,
					 kobject_name(&obj->kobj));
	 }

	return 0;
}

int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	if (node_online(nid)) {
		struct sys_device *obj = get_cpu_sysdev(cpu);
		if (obj)
			sysfs_remove_link(&node_devices[nid].sysdev.kobj,
					 kobject_name(&obj->kobj));
	}
	return 0;
}

int register_one_node(int nid)
{
	int error = 0;
	int cpu;

	if (node_online(nid)) {
		int p_node = parent_node(nid);
		struct node *parent = NULL;

		if (p_node != nid)
			parent = &node_devices[p_node];

		error = register_node(&node_devices[nid], nid, parent);

		/* link cpu under this node */
		for_each_present_cpu(cpu) {
			if (cpu_to_node(cpu) == nid)
				register_cpu_under_node(cpu, nid);
		}
	}

	return error;

}

void unregister_one_node(int nid)
{
	unregister_node(&node_devices[nid]);
}

/*
 * node states attributes
 */

static ssize_t print_nodes_state(enum node_states state, char *buf)
{
	int n;

	n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]);
	if (n > 0 && PAGE_SIZE > n + 1) {
		*(buf + n++) = '\n';
		*(buf + n++) = '\0';
	}
	return n;
}

static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf)
{
	return print_nodes_state(N_POSSIBLE, buf);
}

static ssize_t print_nodes_online(struct sysdev_class *class, char *buf)
{
	return print_nodes_state(N_ONLINE, buf);
}

static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
						char *buf)
{
	return print_nodes_state(N_NORMAL_MEMORY, buf);
}

static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf)
{
	return print_nodes_state(N_CPU, buf);
}

static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL);
static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL);
static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
									NULL);
static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);

#ifdef CONFIG_HIGHMEM
static ssize_t print_nodes_has_high_memory(struct sysdev_class *class,
						 char *buf)
{
	return print_nodes_state(N_HIGH_MEMORY, buf);
}

static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
									 NULL);
#endif

struct sysdev_class_attribute *node_state_attr[] = {
	&attr_possible,
	&attr_online,
	&attr_has_normal_memory,
#ifdef CONFIG_HIGHMEM
	&attr_has_high_memory,
#endif
	&attr_has_cpu,
};

static int node_states_init(void)
{
	int i;
	int err = 0;

	for (i = 0;  i < NR_NODE_STATES; i++) {
		int ret;
		ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
		if (!err)
			err = ret;
	}
	return err;
}

static int __init register_node_type(void)
{
	int ret;

	ret = sysdev_class_register(&node_class);
	if (!ret)
		ret = node_states_init();

	/*
	 * Note:  we're not going to unregister the node class if we fail
	 * to register the node state class attribute files.
	 */
	return ret;
}
postcore_initcall(register_node_type);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/base/node.c - basic Node class support
	3	*/
	4
	5	#include <linux/sysdev.h>
	6	#include <linux/module.h>
	7	#include <linux/init.h>
	8	#include <linux/mm.h>
	9	#include <linux/node.h>
	10	#include <linux/hugetlb.h>
	11	#include <linux/cpumask.h>
	12	#include <linux/topology.h>
	13	#include <linux/nodemask.h>
76b67ed9	14	#include <linux/cpu.h>
bde631a5	15	#include <linux/device.h>
1da177e4 LT	16
1da177e4 LT	17	static struct sysdev_class node_class = {
af5ca3f4	18	.name = "node",
1da177e4 LT	19	};
	20
	21
39106dcf	22	static ssize_t node_read_cpumap(struct sys_device dev, int type, char buf)
1da177e4 LT	23	{
1da177e4 LT	24	struct node *node_dev = to_node(dev);
c5f59f08	25	node_to_cpumask_ptr(mask, node_dev->sysdev.id);
1da177e4 LT	26	int len;
1da177e4 LT	27
39106dcf MT	28	/* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
39106dcf MT	29	BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
1da177e4	30
39106dcf MT	31	len = type?
	32	cpulist_scnprintf(buf, PAGE_SIZE-2, *mask):
	33	cpumask_scnprintf(buf, PAGE_SIZE-2, *mask);
c5f59f08 MT	34	buf[len++] = '\n';
c5f59f08 MT	35	buf[len] = '\0';
1da177e4 LT	36	return len;
	37	}
	38
39106dcf MT	39	static inline ssize_t node_read_cpumask(struct sys_device dev, char buf)
	40	{
	41	return node_read_cpumap(dev, 0, buf);
	42	}
	43	static inline ssize_t node_read_cpulist(struct sys_device dev, char buf)
	44	{
	45	return node_read_cpumap(dev, 1, buf);
	46	}
	47
	48	static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
	49	static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
1da177e4 LT	50
	51	#define K(x) ((x) << (PAGE_SHIFT - 10))
	52	static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
	53	{
	54	int n;
	55	int nid = dev->id;
	56	struct sysinfo i;
1da177e4 LT	57
1da177e4 LT	58	si_meminfo_node(&i, nid);
c07e02db	59
1da177e4 LT	60	n = sprintf(buf, "\n"
	61	"Node %d MemTotal: %8lu kB\n"
	62	"Node %d MemFree: %8lu kB\n"
	63	"Node %d MemUsed: %8lu kB\n"
	64	"Node %d Active: %8lu kB\n"
	65	"Node %d Inactive: %8lu kB\n"
182e8e23	66	#ifdef CONFIG_HIGHMEM
1da177e4 LT	67	"Node %d HighTotal: %8lu kB\n"
	68	"Node %d HighFree: %8lu kB\n"
	69	"Node %d LowTotal: %8lu kB\n"
c07e02db	70	"Node %d LowFree: %8lu kB\n"
182e8e23	71	#endif
c07e02db MH	72	"Node %d Dirty: %8lu kB\n"
c07e02db MH	73	"Node %d Writeback: %8lu kB\n"
347ce434	74	"Node %d FilePages: %8lu kB\n"
c07e02db	75	"Node %d Mapped: %8lu kB\n"
f3dbd344	76	"Node %d AnonPages: %8lu kB\n"
df849a15	77	"Node %d PageTables: %8lu kB\n"
f5ef68da	78	"Node %d NFS_Unstable: %8lu kB\n"
d2c5e30c	79	"Node %d Bounce: %8lu kB\n"
fc3ba692	80	"Node %d WritebackTmp: %8lu kB\n"
972d1a7b CL	81	"Node %d Slab: %8lu kB\n"
	82	"Node %d SReclaimable: %8lu kB\n"
	83	"Node %d SUnreclaim: %8lu kB\n",
1da177e4 LT	84	nid, K(i.totalram),
	85	nid, K(i.freeram),
	86	nid, K(i.totalram - i.freeram),
05a0416b CL	87	nid, node_page_state(nid, NR_ACTIVE),
05a0416b CL	88	nid, node_page_state(nid, NR_INACTIVE),
182e8e23	89	#ifdef CONFIG_HIGHMEM
1da177e4 LT	90	nid, K(i.totalhigh),
	91	nid, K(i.freehigh),
	92	nid, K(i.totalram - i.totalhigh),
c07e02db	93	nid, K(i.freeram - i.freehigh),
182e8e23	94	#endif
b1e7a8fd	95	nid, K(node_page_state(nid, NR_FILE_DIRTY)),
ce866b34	96	nid, K(node_page_state(nid, NR_WRITEBACK)),
347ce434	97	nid, K(node_page_state(nid, NR_FILE_PAGES)),
65ba55f5	98	nid, K(node_page_state(nid, NR_FILE_MAPPED)),
f3dbd344	99	nid, K(node_page_state(nid, NR_ANON_PAGES)),
df849a15	100	nid, K(node_page_state(nid, NR_PAGETABLE)),
fd39fc85	101	nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
d2c5e30c	102	nid, K(node_page_state(nid, NR_BOUNCE)),
fc3ba692	103	nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)),
972d1a7b CL	104	nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
	105	node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
	106	nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
	107	nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
1da177e4 LT	108	n += hugetlb_report_node_meminfo(nid, buf + n);
	109	return n;
	110	}
	111
	112	#undef K
	113	static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
	114
	115	static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
	116	{
1da177e4 LT	117	return sprintf(buf,
	118	"numa_hit %lu\n"
	119	"numa_miss %lu\n"
	120	"numa_foreign %lu\n"
	121	"interleave_hit %lu\n"
	122	"local_node %lu\n"
	123	"other_node %lu\n",
ca889e6c CL	124	node_page_state(dev->id, NUMA_HIT),
	125	node_page_state(dev->id, NUMA_MISS),
	126	node_page_state(dev->id, NUMA_FOREIGN),
	127	node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
	128	node_page_state(dev->id, NUMA_LOCAL),
	129	node_page_state(dev->id, NUMA_OTHER));
1da177e4 LT	130	}
	131	static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
	132
	133	static ssize_t node_read_distance(struct sys_device * dev, char * buf)
	134	{
	135	int nid = dev->id;
	136	int len = 0;
	137	int i;
	138
	139	/* buf currently PAGE_SIZE, need ~4 chars per node */
	140	BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
	141
	142	for_each_online_node(i)
	143	len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
	144
	145	len += sprintf(buf + len, "\n");
	146	return len;
	147	}
	148	static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
	149
	150
	151	/*
405ae7d3	152	* register_node - Setup a sysfs device for a node.
1da177e4 LT	153	* @num - Node number to use when creating the device.
	154	*
	155	* Initialize and register the node device.
	156	*/
4b45099b	157	int register_node(struct node node, int num, struct node parent)
1da177e4 LT	158	{
	159	int error;
	160
	161	node->sysdev.id = num;
	162	node->sysdev.cls = &node_class;
	163	error = sysdev_register(&node->sysdev);
	164
	165	if (!error){
	166	sysdev_create_file(&node->sysdev, &attr_cpumap);
39106dcf	167	sysdev_create_file(&node->sysdev, &attr_cpulist);
1da177e4 LT	168	sysdev_create_file(&node->sysdev, &attr_meminfo);
	169	sysdev_create_file(&node->sysdev, &attr_numastat);
	170	sysdev_create_file(&node->sysdev, &attr_distance);
	171	}
	172	return error;
	173	}
	174
4b45099b KT	175	/**
	176	* unregister_node - unregister a node device
	177	* @node: node going away
	178	*
	179	* Unregisters a node device @node. All the devices on the node must be
	180	* unregistered before calling this function.
	181	*/
	182	void unregister_node(struct node *node)
	183	{
	184	sysdev_remove_file(&node->sysdev, &attr_cpumap);
39106dcf	185	sysdev_remove_file(&node->sysdev, &attr_cpulist);
4b45099b KT	186	sysdev_remove_file(&node->sysdev, &attr_meminfo);
	187	sysdev_remove_file(&node->sysdev, &attr_numastat);
	188	sysdev_remove_file(&node->sysdev, &attr_distance);
	189
	190	sysdev_unregister(&node->sysdev);
	191	}
1da177e4	192
0fc44159 YG	193	struct node node_devices[MAX_NUMNODES];
0fc44159 YG	194
76b67ed9 KH	195	/*
	196	* register cpu under node
	197	*/
	198	int register_cpu_under_node(unsigned int cpu, unsigned int nid)
	199	{
	200	if (node_online(nid)) {
	201	struct sys_device *obj = get_cpu_sysdev(cpu);
	202	if (!obj)
	203	return 0;
	204	return sysfs_create_link(&node_devices[nid].sysdev.kobj,
	205	&obj->kobj,
	206	kobject_name(&obj->kobj));
	207	}
	208
	209	return 0;
	210	}
	211
	212	int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
	213	{
	214	if (node_online(nid)) {
	215	struct sys_device *obj = get_cpu_sysdev(cpu);
	216	if (obj)
	217	sysfs_remove_link(&node_devices[nid].sysdev.kobj,
	218	kobject_name(&obj->kobj));
	219	}
	220	return 0;
	221	}
	222
0fc44159 YG	223	int register_one_node(int nid)
	224	{
	225	int error = 0;
76b67ed9	226	int cpu;
0fc44159 YG	227
	228	if (node_online(nid)) {
	229	int p_node = parent_node(nid);
	230	struct node *parent = NULL;
	231
	232	if (p_node != nid)
	233	parent = &node_devices[p_node];
	234
	235	error = register_node(&node_devices[nid], nid, parent);
76b67ed9 KH	236
	237	/* link cpu under this node */
	238	for_each_present_cpu(cpu) {
	239	if (cpu_to_node(cpu) == nid)
	240	register_cpu_under_node(cpu, nid);
	241	}
0fc44159 YG	242	}
	243
	244	return error;
	245
	246	}
	247
	248	void unregister_one_node(int nid)
	249	{
	250	unregister_node(&node_devices[nid]);
	251	}
	252
bde631a5 LS	253	/*
	254	* node states attributes
	255	*/
	256
	257	static ssize_t print_nodes_state(enum node_states state, char *buf)
	258	{
	259	int n;
	260
	261	n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]);
	262	if (n > 0 && PAGE_SIZE > n + 1) {
	263	*(buf + n++) = '\n';
	264	*(buf + n++) = '\0';
	265	}
	266	return n;
	267	}
	268
	269	static ssize_t print_nodes_possible(struct sysdev_class class, char buf)
	270	{
	271	return print_nodes_state(N_POSSIBLE, buf);
	272	}
	273
	274	static ssize_t print_nodes_online(struct sysdev_class class, char buf)
	275	{
	276	return print_nodes_state(N_ONLINE, buf);
	277	}
	278
	279	static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
	280	char *buf)
	281	{
	282	return print_nodes_state(N_NORMAL_MEMORY, buf);
	283	}
	284
	285	static ssize_t print_nodes_has_cpu(struct sysdev_class class, char buf)
	286	{
	287	return print_nodes_state(N_CPU, buf);
	288	}
	289
	290	static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL);
	291	static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL);
	292	static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
	293	NULL);
	294	static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);
	295
	296	#ifdef CONFIG_HIGHMEM
	297	static ssize_t print_nodes_has_high_memory(struct sysdev_class *class,
	298	char *buf)
	299	{
	300	return print_nodes_state(N_HIGH_MEMORY, buf);
	301	}
	302
	303	static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
	304	NULL);
	305	#endif
	306
	307	struct sysdev_class_attribute *node_state_attr[] = {
	308	&attr_possible,
	309	&attr_online,
	310	&attr_has_normal_memory,
	311	#ifdef CONFIG_HIGHMEM
	312	&attr_has_high_memory,
	313	#endif
	314	&attr_has_cpu,
	315	};
	316
317	static int node_states_init(void)
318	{
319	int i;
320	int err = 0;
321
322	for (i = 0; i < NR_NODE_STATES; i++) {
323	int ret;
324	ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
325	if (!err)
326	err = ret;
327	}
328	return err;
329	}
330
4b45099b	331	static int __init register_node_type(void)
1da177e4	332	{
bde631a5 LS	333	int ret;
	334
	335	ret = sysdev_class_register(&node_class);
	336	if (!ret)
	337	ret = node_states_init();
	338
	339	/*
	340	* Note: we're not going to unregister the node class if we fail
	341	* to register the node state class attribute files.
	342	*/
	343	return ret;
1da177e4 LT	344	}
1da177e4 LT	345	postcore_initcall(register_node_type);