[deliverable/linux.git] / drivers / acpi / numa.c

/*
 *  acpi_numa.c - ACPI NUMA support
 *
 *  Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/numa.h>
#include <acpi/acpi_bus.h>

#define PREFIX "ACPI: "

#define ACPI_NUMA	0x80000000
#define _COMPONENT	ACPI_NUMA
ACPI_MODULE_NAME("numa");

static nodemask_t nodes_found_map = NODE_MASK_NONE;

/* maps to convert between proximity domain and logical node ID */
static int pxm_to_node_map[MAX_PXM_DOMAINS]
			= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
static int node_to_pxm_map[MAX_NUMNODES]
			= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };

unsigned char acpi_srat_revision __initdata;

int pxm_to_node(int pxm)
{
	if (pxm < 0)
		return NUMA_NO_NODE;
	return pxm_to_node_map[pxm];
}

int node_to_pxm(int node)
{
	if (node < 0)
		return PXM_INVAL;
	return node_to_pxm_map[node];
}

void __acpi_map_pxm_to_node(int pxm, int node)
{
	if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
		pxm_to_node_map[pxm] = node;
	if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
		node_to_pxm_map[node] = pxm;
}

int acpi_map_pxm_to_node(int pxm)
{
	int node = pxm_to_node_map[pxm];

	if (node < 0) {
		if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
			return NUMA_NO_NODE;
		node = first_unset_node(nodes_found_map);
		__acpi_map_pxm_to_node(pxm, node);
		node_set(node, nodes_found_map);
	}

	return node;
}

static void __init
acpi_table_print_srat_entry(struct acpi_subtable_header *header)
{

	ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");

	if (!header)
		return;

	switch (header->type) {

	case ACPI_SRAT_TYPE_CPU_AFFINITY:
#ifdef ACPI_DEBUG_OUTPUT
		{
			struct acpi_srat_cpu_affinity *p =
			    (struct acpi_srat_cpu_affinity *)header;
			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
					  "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
					  p->apic_id, p->local_sapic_eid,
					  p->proximity_domain_lo,
					  (p->flags & ACPI_SRAT_CPU_ENABLED)?
					  "enabled" : "disabled"));
		}
#endif				/* ACPI_DEBUG_OUTPUT */
		break;

	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
#ifdef ACPI_DEBUG_OUTPUT
		{
			struct acpi_srat_mem_affinity *p =
			    (struct acpi_srat_mem_affinity *)header;
			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
					  "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
					  (unsigned long)p->base_address,
					  (unsigned long)p->length,
					  p->proximity_domain,
					  (p->flags & ACPI_SRAT_MEM_ENABLED)?
					  "enabled" : "disabled",
					  (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
					  " hot-pluggable" : "",
					  (p->flags & ACPI_SRAT_MEM_NON_VOLATILE)?
					  " non-volatile" : ""));
		}
#endif				/* ACPI_DEBUG_OUTPUT */
		break;

	case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
#ifdef ACPI_DEBUG_OUTPUT
		{
			struct acpi_srat_x2apic_cpu_affinity *p =
			    (struct acpi_srat_x2apic_cpu_affinity *)header;
			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
					  "SRAT Processor (x2apicid[0x%08x]) in"
					  " proximity domain %d %s\n",
					  p->apic_id,
					  p->proximity_domain,
					  (p->flags & ACPI_SRAT_CPU_ENABLED) ?
					  "enabled" : "disabled"));
		}
#endif				/* ACPI_DEBUG_OUTPUT */
		break;
	default:
		printk(KERN_WARNING PREFIX
		       "Found unsupported SRAT entry (type = 0x%x)\n",
		       header->type);
		break;
	}
}

/*
 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
 * up the NUMA heuristics which wants the local node to have a smaller
 * distance than the others.
 * Do some quick checks here and only use the SLIT if it passes.
 */
static int __init slit_valid(struct acpi_table_slit *slit)
{
	int i, j;
	int d = slit->locality_count;
	for (i = 0; i < d; i++) {
		for (j = 0; j < d; j++)  {
			u8 val = slit->entry[d*i + j];
			if (i == j) {
				if (val != LOCAL_DISTANCE)
					return 0;
			} else if (val <= LOCAL_DISTANCE)
				return 0;
		}
	}
	return 1;
}

static int __init acpi_parse_slit(struct acpi_table_header *table)
{
	struct acpi_table_slit *slit;

	if (!table)
		return -EINVAL;

	slit = (struct acpi_table_slit *)table;

	if (!slit_valid(slit)) {
		printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
		return -EINVAL;
	}
	acpi_numa_slit_init(slit);

	return 0;
}

void __init __attribute__ ((weak))
acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
{
	printk(KERN_WARNING PREFIX
	       "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
	return;
}


static int __init
acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
			   const unsigned long end)
{
	struct acpi_srat_x2apic_cpu_affinity *processor_affinity;

	processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
	if (!processor_affinity)
		return -EINVAL;

	acpi_table_print_srat_entry(header);

	/* let architecture-dependent part to do it */
	acpi_numa_x2apic_affinity_init(processor_affinity);

	return 0;
}

static int __init
acpi_parse_processor_affinity(struct acpi_subtable_header *header,
			      const unsigned long end)
{
	struct acpi_srat_cpu_affinity *processor_affinity;

	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
	if (!processor_affinity)
		return -EINVAL;

	acpi_table_print_srat_entry(header);

	/* let architecture-dependent part to do it */
	acpi_numa_processor_affinity_init(processor_affinity);

	return 0;
}

static int __initdata parsed_numa_memblks;

static int __init
acpi_parse_memory_affinity(struct acpi_subtable_header * header,
			   const unsigned long end)
{
	struct acpi_srat_mem_affinity *memory_affinity;

	memory_affinity = (struct acpi_srat_mem_affinity *)header;
	if (!memory_affinity)
		return -EINVAL;

	acpi_table_print_srat_entry(header);

	/* let architecture-dependent part to do it */
	if (!acpi_numa_memory_affinity_init(memory_affinity))
		parsed_numa_memblks++;
	return 0;
}

static int __init acpi_parse_srat(struct acpi_table_header *table)
{
	struct acpi_table_srat *srat;
	if (!table)
		return -EINVAL;

	srat = (struct acpi_table_srat *)table;
	acpi_srat_revision = srat->header.revision;

	/* Real work done in acpi_table_parse_srat below. */

	return 0;
}

static int __init
acpi_table_parse_srat(enum acpi_srat_type id,
		      acpi_tbl_entry_handler handler, unsigned int max_entries)
{
	return acpi_table_parse_entries(ACPI_SIG_SRAT,
					    sizeof(struct acpi_table_srat), id,
					    handler, max_entries);
}

int __init acpi_numa_init(void)
{
	int cnt = 0;

	/*
	 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
	 * SRAT cpu entries could have different order with that in MADT.
	 * So go over all cpu entries in SRAT to get apicid to node mapping.
	 */

	/* SRAT: Static Resource Affinity Table */
	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
		acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
				     acpi_parse_x2apic_affinity, 0);
		acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
				     acpi_parse_processor_affinity, 0);
		cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
					    acpi_parse_memory_affinity,
					    NR_NODE_MEMBLKS);
	}

	/* SLIT: System Locality Information Table */
	acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);

	acpi_numa_arch_fixup();

	if (cnt < 0)
		return cnt;
	else if (!parsed_numa_memblks)
		return -ENOENT;
	return 0;
}

int acpi_get_pxm(acpi_handle h)
{
	unsigned long long pxm;
	acpi_status status;
	acpi_handle handle;
	acpi_handle phandle = h;

	do {
		handle = phandle;
		status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
		if (ACPI_SUCCESS(status))
			return pxm;
		status = acpi_get_parent(handle, &phandle);
	} while (ACPI_SUCCESS(status));
	return -1;
}

int acpi_get_node(acpi_handle *handle)
{
	int pxm, node = -1;

	pxm = acpi_get_pxm(handle);
	if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
		node = acpi_map_pxm_to_node(pxm);

	return node;
}
EXPORT_SYMBOL(acpi_get_node);
Commit	Line	Data
	1	/*
	2	* acpi_numa.c - ACPI NUMA support
	3	*
	4	* Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
	5	*
	6	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	23	*
	24	*/
	25	#include <linux/module.h>
	26	#include <linux/init.h>
	27	#include <linux/kernel.h>
	28	#include <linux/types.h>
	29	#include <linux/errno.h>
	30	#include <linux/acpi.h>
	31	#include <linux/numa.h>
	32	#include <acpi/acpi_bus.h>
	33
	34	#define PREFIX "ACPI: "
	35
	36	#define ACPI_NUMA 0x80000000
	37	#define _COMPONENT ACPI_NUMA
	38	ACPI_MODULE_NAME("numa");
	39
	40	static nodemask_t nodes_found_map = NODE_MASK_NONE;
	41
	42	/* maps to convert between proximity domain and logical node ID */
	43	static int pxm_to_node_map[MAX_PXM_DOMAINS]
	44	= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
	45	static int node_to_pxm_map[MAX_NUMNODES]
	46	= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
	47
	48	unsigned char acpi_srat_revision __initdata;
	49
	50	int pxm_to_node(int pxm)
	51	{
	52	if (pxm < 0)
	53	return NUMA_NO_NODE;
	54	return pxm_to_node_map[pxm];
	55	}
	56
	57	int node_to_pxm(int node)
	58	{
	59	if (node < 0)
	60	return PXM_INVAL;
	61	return node_to_pxm_map[node];
	62	}
	63
	64	void __acpi_map_pxm_to_node(int pxm, int node)
	65	{
	66	if (pxm_to_node_map[pxm] == NUMA_NO_NODE \|\| node < pxm_to_node_map[pxm])
	67	pxm_to_node_map[pxm] = node;
	68	if (node_to_pxm_map[node] == PXM_INVAL \|\| pxm < node_to_pxm_map[node])
	69	node_to_pxm_map[node] = pxm;
	70	}
	71
	72	int acpi_map_pxm_to_node(int pxm)
	73	{
	74	int node = pxm_to_node_map[pxm];
	75
	76	if (node < 0) {
	77	if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
	78	return NUMA_NO_NODE;
	79	node = first_unset_node(nodes_found_map);
	80	__acpi_map_pxm_to_node(pxm, node);
	81	node_set(node, nodes_found_map);
	82	}
	83
	84	return node;
	85	}
	86
	87	static void __init
	88	acpi_table_print_srat_entry(struct acpi_subtable_header *header)
	89	{
	90
	91	ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
	92
	93	if (!header)
	94	return;
	95
	96	switch (header->type) {
	97
	98	case ACPI_SRAT_TYPE_CPU_AFFINITY:
	99	#ifdef ACPI_DEBUG_OUTPUT
	100	{
	101	struct acpi_srat_cpu_affinity *p =
	102	(struct acpi_srat_cpu_affinity *)header;
	103	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	104	"SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
	105	p->apic_id, p->local_sapic_eid,
	106	p->proximity_domain_lo,
	107	(p->flags & ACPI_SRAT_CPU_ENABLED)?
	108	"enabled" : "disabled"));
	109	}
	110	#endif /* ACPI_DEBUG_OUTPUT */
	111	break;
	112
	113	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
	114	#ifdef ACPI_DEBUG_OUTPUT
	115	{
	116	struct acpi_srat_mem_affinity *p =
	117	(struct acpi_srat_mem_affinity *)header;
	118	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	119	"SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
	120	(unsigned long)p->base_address,
	121	(unsigned long)p->length,
	122	p->proximity_domain,
	123	(p->flags & ACPI_SRAT_MEM_ENABLED)?
	124	"enabled" : "disabled",
	125	(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
	126	" hot-pluggable" : "",
	127	(p->flags & ACPI_SRAT_MEM_NON_VOLATILE)?
	128	" non-volatile" : ""));
	129	}
	130	#endif /* ACPI_DEBUG_OUTPUT */
	131	break;
	132
	133	case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
	134	#ifdef ACPI_DEBUG_OUTPUT
	135	{
	136	struct acpi_srat_x2apic_cpu_affinity *p =
	137	(struct acpi_srat_x2apic_cpu_affinity *)header;
	138	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	139	"SRAT Processor (x2apicid[0x%08x]) in"
	140	" proximity domain %d %s\n",
	141	p->apic_id,
	142	p->proximity_domain,
	143	(p->flags & ACPI_SRAT_CPU_ENABLED) ?
	144	"enabled" : "disabled"));
	145	}
	146	#endif /* ACPI_DEBUG_OUTPUT */
	147	break;
	148	default:
	149	printk(KERN_WARNING PREFIX
	150	"Found unsupported SRAT entry (type = 0x%x)\n",
	151	header->type);
	152	break;
	153	}
	154	}
	155
	156	/*
	157	* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
	158	* up the NUMA heuristics which wants the local node to have a smaller
	159	* distance than the others.
	160	* Do some quick checks here and only use the SLIT if it passes.
	161	*/
	162	static int __init slit_valid(struct acpi_table_slit *slit)
	163	{
	164	int i, j;
	165	int d = slit->locality_count;
	166	for (i = 0; i < d; i++) {
	167	for (j = 0; j < d; j++) {
	168	u8 val = slit->entry[d*i + j];
	169	if (i == j) {
	170	if (val != LOCAL_DISTANCE)
	171	return 0;
	172	} else if (val <= LOCAL_DISTANCE)
	173	return 0;
	174	}
	175	}
	176	return 1;
	177	}
	178
	179	static int __init acpi_parse_slit(struct acpi_table_header *table)
	180	{
	181	struct acpi_table_slit *slit;
	182
	183	if (!table)
	184	return -EINVAL;
	185
	186	slit = (struct acpi_table_slit *)table;
	187
	188	if (!slit_valid(slit)) {
	189	printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
	190	return -EINVAL;
	191	}
	192	acpi_numa_slit_init(slit);
	193
	194	return 0;
	195	}
	196
	197	void __init __attribute__ ((weak))
	198	acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
	199	{
	200	printk(KERN_WARNING PREFIX
	201	"Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
	202	return;
	203	}
	204
	205
	206	static int __init
	207	acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
	208	const unsigned long end)
	209	{
	210	struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
	211
	212	processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
	213	if (!processor_affinity)
	214	return -EINVAL;
	215
	216	acpi_table_print_srat_entry(header);
	217
	218	/* let architecture-dependent part to do it */
	219	acpi_numa_x2apic_affinity_init(processor_affinity);
	220
	221	return 0;
	222	}
	223
	224	static int __init
	225	acpi_parse_processor_affinity(struct acpi_subtable_header *header,
	226	const unsigned long end)
	227	{
	228	struct acpi_srat_cpu_affinity *processor_affinity;
	229
	230	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
	231	if (!processor_affinity)
	232	return -EINVAL;
	233
	234	acpi_table_print_srat_entry(header);
	235
	236	/* let architecture-dependent part to do it */
	237	acpi_numa_processor_affinity_init(processor_affinity);
	238
	239	return 0;
	240	}
	241
	242	static int __initdata parsed_numa_memblks;
	243
	244	static int __init
	245	acpi_parse_memory_affinity(struct acpi_subtable_header * header,
	246	const unsigned long end)
	247	{
	248	struct acpi_srat_mem_affinity *memory_affinity;
	249
	250	memory_affinity = (struct acpi_srat_mem_affinity *)header;
	251	if (!memory_affinity)
	252	return -EINVAL;
	253
	254	acpi_table_print_srat_entry(header);
	255
	256	/* let architecture-dependent part to do it */
	257	if (!acpi_numa_memory_affinity_init(memory_affinity))
	258	parsed_numa_memblks++;
	259	return 0;
	260	}
	261
	262	static int __init acpi_parse_srat(struct acpi_table_header *table)
	263	{
	264	struct acpi_table_srat *srat;
	265	if (!table)
	266	return -EINVAL;
	267
	268	srat = (struct acpi_table_srat *)table;
	269	acpi_srat_revision = srat->header.revision;
	270
	271	/* Real work done in acpi_table_parse_srat below. */
	272
	273	return 0;
	274	}
	275
	276	static int __init
	277	acpi_table_parse_srat(enum acpi_srat_type id,
	278	acpi_tbl_entry_handler handler, unsigned int max_entries)
	279	{
	280	return acpi_table_parse_entries(ACPI_SIG_SRAT,
	281	sizeof(struct acpi_table_srat), id,
	282	handler, max_entries);
	283	}
	284
	285	int __init acpi_numa_init(void)
	286	{
	287	int cnt = 0;
	288
	289	/*
	290	* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
	291	* SRAT cpu entries could have different order with that in MADT.
	292	* So go over all cpu entries in SRAT to get apicid to node mapping.
	293	*/
	294
	295	/* SRAT: Static Resource Affinity Table */
	296	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
	297	acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
	298	acpi_parse_x2apic_affinity, 0);
	299	acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
	300	acpi_parse_processor_affinity, 0);
	301	cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
	302	acpi_parse_memory_affinity,
	303	NR_NODE_MEMBLKS);
	304	}
	305
	306	/* SLIT: System Locality Information Table */
	307	acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
	308
	309	acpi_numa_arch_fixup();
	310
	311	if (cnt < 0)
	312	return cnt;
	313	else if (!parsed_numa_memblks)
	314	return -ENOENT;
	315	return 0;
	316	}
	317
	318	int acpi_get_pxm(acpi_handle h)
	319	{
	320	unsigned long long pxm;
	321	acpi_status status;
	322	acpi_handle handle;
	323	acpi_handle phandle = h;
	324
	325	do {
	326	handle = phandle;
	327	status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
	328	if (ACPI_SUCCESS(status))
	329	return pxm;
	330	status = acpi_get_parent(handle, &phandle);
	331	} while (ACPI_SUCCESS(status));
	332	return -1;
	333	}
	334
	335	int acpi_get_node(acpi_handle *handle)
	336	{
	337	int pxm, node = -1;
	338
	339	pxm = acpi_get_pxm(handle);
	340	if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
	341	node = acpi_map_pxm_to_node(pxm);
	342
	343	return node;
	344	}
	345	EXPORT_SYMBOL(acpi_get_node);