[mirror_ubuntu-bionic-kernel.git] / mm / nobootmem.c

/*
 *  bootmem - A boot-time physical memory allocator and configurator
 *
 *  Copyright (C) 1999 Ingo Molnar
 *                1999 Kanoj Sarcar, SGI
 *                2008 Johannes Weiner
 *
 * Access to this subsystem has to be serialized externally (which is true
 * for the boot process anyway).
 */
#include <linux/init.h>
#include <linux/pfn.h>
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <linux/export.h>
#include <linux/kmemleak.h>
#include <linux/range.h>
#include <linux/memblock.h>

#include <asm/bug.h>
#include <asm/io.h>
#include <asm/processor.h>

#include "internal.h"

#ifndef CONFIG_NEED_MULTIPLE_NODES
struct pglist_data __refdata contig_page_data;
EXPORT_SYMBOL(contig_page_data);
#endif

unsigned long max_low_pfn;
unsigned long min_low_pfn;
unsigned long max_pfn;

static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
					u64 goal, u64 limit)
{
	void *ptr;
	u64 addr;
	ulong flags = choose_memblock_flags();

	if (limit > memblock.current_limit)
		limit = memblock.current_limit;

again:
	addr = memblock_find_in_range_node(size, align, goal, limit, nid,
					   flags);
	if (!addr && (flags & MEMBLOCK_MIRROR)) {
		flags &= ~MEMBLOCK_MIRROR;
		pr_warn("Could not allocate %pap bytes of mirrored memory\n",
			&size);
		goto again;
	}
	if (!addr)
		return NULL;

	if (memblock_reserve(addr, size))
		return NULL;

	ptr = phys_to_virt(addr);
	memset(ptr, 0, size);
	/*
	 * The min_count is set to 0 so that bootmem allocated blocks
	 * are never reported as leaks.
	 */
	kmemleak_alloc(ptr, size, 0, 0);
	return ptr;
}

/*
 * free_bootmem_late - free bootmem pages directly to page allocator
 * @addr: starting address of the range
 * @size: size of the range in bytes
 *
 * This is only useful when the bootmem allocator has already been torn
 * down, but we are still initializing the system.  Pages are given directly
 * to the page allocator, no bootmem metadata is updated because it is gone.
 */
void __init free_bootmem_late(unsigned long addr, unsigned long size)
{
	unsigned long cursor, end;

	kmemleak_free_part(__va(addr), size);

	cursor = PFN_UP(addr);
	end = PFN_DOWN(addr + size);

	for (; cursor < end; cursor++) {
		__free_pages_bootmem(pfn_to_page(cursor), 0);
		totalram_pages++;
	}
}

static void __init __free_pages_memory(unsigned long start, unsigned long end)
{
	int order;

	while (start < end) {
		order = min(MAX_ORDER - 1UL, __ffs(start));

		while (start + (1UL << order) > end)
			order--;

		__free_pages_bootmem(pfn_to_page(start), order);

		start += (1UL << order);
	}
}

static unsigned long __init __free_memory_core(phys_addr_t start,
				 phys_addr_t end)
{
	unsigned long start_pfn = PFN_UP(start);
	unsigned long end_pfn = min_t(unsigned long,
				      PFN_DOWN(end), max_low_pfn);

	if (start_pfn > end_pfn)
		return 0;

	__free_pages_memory(start_pfn, end_pfn);

	return end_pfn - start_pfn;
}

static unsigned long __init free_low_memory_core_early(void)
{
	unsigned long count = 0;
	phys_addr_t start, end;
	u64 i;

	memblock_clear_hotplug(0, -1);

	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
				NULL)
		count += __free_memory_core(start, end);

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
	{
		phys_addr_t size;

		/* Free memblock.reserved array if it was allocated */
		size = get_allocated_memblock_reserved_regions_info(&start);
		if (size)
			count += __free_memory_core(start, start + size);

		/* Free memblock.memory array if it was allocated */
		size = get_allocated_memblock_memory_regions_info(&start);
		if (size)
			count += __free_memory_core(start, start + size);
	}
#endif

	return count;
}

static int reset_managed_pages_done __initdata;

void reset_node_managed_pages(pg_data_t *pgdat)
{
	struct zone *z;

	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
		z->managed_pages = 0;
}

void __init reset_all_zones_managed_pages(void)
{
	struct pglist_data *pgdat;

	if (reset_managed_pages_done)
		return;

	for_each_online_pgdat(pgdat)
		reset_node_managed_pages(pgdat);

	reset_managed_pages_done = 1;
}

/**
 * free_all_bootmem - release free pages to the buddy allocator
 *
 * Returns the number of pages actually released.
 */
unsigned long __init free_all_bootmem(void)
{
	unsigned long pages;

	reset_all_zones_managed_pages();

	/*
	 * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
	 *  because in some case like Node0 doesn't have RAM installed
	 *  low ram will be on Node1
	 */
	pages = free_low_memory_core_early();
	totalram_pages += pages;

	return pages;
}

/**
 * free_bootmem_node - mark a page range as usable
 * @pgdat: node the range resides on
 * @physaddr: starting address of the range
 * @size: size of the range in bytes
 *
 * Partial pages will be considered reserved and left as they are.
 *
 * The range must reside completely on the specified node.
 */
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
			      unsigned long size)
{
	memblock_free(physaddr, size);
}

/**
 * free_bootmem - mark a page range as usable
 * @addr: starting address of the range
 * @size: size of the range in bytes
 *
 * Partial pages will be considered reserved and left as they are.
 *
 * The range must be contiguous but may span node boundaries.
 */
void __init free_bootmem(unsigned long addr, unsigned long size)
{
	memblock_free(addr, size);
}

static void * __init ___alloc_bootmem_nopanic(unsigned long size,
					unsigned long align,
					unsigned long goal,
					unsigned long limit)
{
	void *ptr;

	if (WARN_ON_ONCE(slab_is_available()))
		return kzalloc(size, GFP_NOWAIT);

restart:

	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);

	if (ptr)
		return ptr;

	if (goal != 0) {
		goal = 0;
		goto restart;
	}

	return NULL;
}

/**
 * __alloc_bootmem_nopanic - allocate boot memory without panicking
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * Returns NULL on failure.
 */
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
					unsigned long goal)
{
	unsigned long limit = -1UL;

	return ___alloc_bootmem_nopanic(size, align, goal, limit);
}

static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
					unsigned long goal, unsigned long limit)
{
	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);

	if (mem)
		return mem;
	/*
	 * Whoops, we cannot satisfy the allocation request.
	 */
	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	panic("Out of memory");
	return NULL;
}

/**
 * __alloc_bootmem - allocate boot memory
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem(unsigned long size, unsigned long align,
			      unsigned long goal)
{
	unsigned long limit = -1UL;

	return ___alloc_bootmem(size, align, goal, limit);
}

void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
						   unsigned long size,
						   unsigned long align,
						   unsigned long goal,
						   unsigned long limit)
{
	void *ptr;

again:
	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
					goal, limit);
	if (ptr)
		return ptr;

	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
					goal, limit);
	if (ptr)
		return ptr;

	if (goal) {
		goal = 0;
		goto again;
	}

	return NULL;
}

void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
				   unsigned long align, unsigned long goal)
{
	if (WARN_ON_ONCE(slab_is_available()))
		return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);

	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
}

static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
				    unsigned long align, unsigned long goal,
				    unsigned long limit)
{
	void *ptr;

	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	if (ptr)
		return ptr;

	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	panic("Out of memory");
	return NULL;
}

/**
 * __alloc_bootmem_node - allocate boot memory from a specific node
 * @pgdat: node to allocate from
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may fall back to any node in the system if the specified node
 * can not hold the requested memory.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
				   unsigned long align, unsigned long goal)
{
	if (WARN_ON_ONCE(slab_is_available()))
		return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);

	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
}

void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
				   unsigned long align, unsigned long goal)
{
	return __alloc_bootmem_node(pgdat, size, align, goal);
}

#ifndef ARCH_LOW_ADDRESS_LIMIT
#define ARCH_LOW_ADDRESS_LIMIT	0xffffffffUL
#endif

/**
 * __alloc_bootmem_low - allocate low boot memory
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may happen on any node in the system.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
				  unsigned long goal)
{
	return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
}

void * __init __alloc_bootmem_low_nopanic(unsigned long size,
					  unsigned long align,
					  unsigned long goal)
{
	return ___alloc_bootmem_nopanic(size, align, goal,
					ARCH_LOW_ADDRESS_LIMIT);
}

/**
 * __alloc_bootmem_low_node - allocate low boot memory from a specific node
 * @pgdat: node to allocate from
 * @size: size of the request in bytes
 * @align: alignment of the region
 * @goal: preferred starting address of the region
 *
 * The goal is dropped if it can not be satisfied and the allocation will
 * fall back to memory below @goal.
 *
 * Allocation may fall back to any node in the system if the specified node
 * can not hold the requested memory.
 *
 * The function panics if the request can not be satisfied.
 */
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
				       unsigned long align, unsigned long goal)
{
	if (WARN_ON_ONCE(slab_is_available()))
		return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);

	return ___alloc_bootmem_node(pgdat, size, align, goal,
				     ARCH_LOW_ADDRESS_LIMIT);
}
Commit	Line	Data
09325873 YL	1	/*
	2	* bootmem - A boot-time physical memory allocator and configurator
	3	*
	4	* Copyright (C) 1999 Ingo Molnar
	5	* 1999 Kanoj Sarcar, SGI
	6	* 2008 Johannes Weiner
	7	*
	8	* Access to this subsystem has to be serialized externally (which is true
	9	* for the boot process anyway).
	10	*/
	11	#include <linux/init.h>
	12	#include <linux/pfn.h>
	13	#include <linux/slab.h>
	14	#include <linux/bootmem.h>
b95f1b31	15	#include <linux/export.h>
09325873 YL	16	#include <linux/kmemleak.h>
	17	#include <linux/range.h>
	18	#include <linux/memblock.h>
	19
	20	#include <asm/bug.h>
	21	#include <asm/io.h>
	22	#include <asm/processor.h>
	23
	24	#include "internal.h"
	25
e782ab42 YL	26	#ifndef CONFIG_NEED_MULTIPLE_NODES
	27	struct pglist_data __refdata contig_page_data;
	28	EXPORT_SYMBOL(contig_page_data);
	29	#endif
	30
09325873 YL	31	unsigned long max_low_pfn;
	32	unsigned long min_low_pfn;
	33	unsigned long max_pfn;
	34
8bc1f91e YL	35	static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
	36	u64 goal, u64 limit)
	37	{
	38	void *ptr;
	39	u64 addr;
a3f5bafc	40	ulong flags = choose_memblock_flags();
8bc1f91e YL	41
	42	if (limit > memblock.current_limit)
	43	limit = memblock.current_limit;
	44
a3f5bafc	45	again:
fc6daaf9	46	addr = memblock_find_in_range_node(size, align, goal, limit, nid,
a3f5bafc TL	47	flags);
	48	if (!addr && (flags & MEMBLOCK_MIRROR)) {
	49	flags &= ~MEMBLOCK_MIRROR;
	50	pr_warn("Could not allocate %pap bytes of mirrored memory\n",
	51	&size);
	52	goto again;
	53	}
1f5026a7	54	if (!addr)
8bc1f91e YL	55	return NULL;
8bc1f91e YL	56
87379ec8 PH	57	if (memblock_reserve(addr, size))
	58	return NULL;
	59
8bc1f91e YL	60	ptr = phys_to_virt(addr);
8bc1f91e YL	61	memset(ptr, 0, size);
8bc1f91e YL	62	/*
	63	* The min_count is set to 0 so that bootmem allocated blocks
	64	* are never reported as leaks.
	65	*/
	66	kmemleak_alloc(ptr, size, 0, 0);
	67	return ptr;
	68	}
	69
09325873 YL	70	/*
	71	* free_bootmem_late - free bootmem pages directly to page allocator
	72	* @addr: starting address of the range
	73	* @size: size of the range in bytes
	74	*
	75	* This is only useful when the bootmem allocator has already been torn
	76	* down, but we are still initializing the system. Pages are given directly
	77	* to the page allocator, no bootmem metadata is updated because it is gone.
	78	*/
	79	void __init free_bootmem_late(unsigned long addr, unsigned long size)
	80	{
	81	unsigned long cursor, end;
	82
	83	kmemleak_free_part(__va(addr), size);
	84
	85	cursor = PFN_UP(addr);
	86	end = PFN_DOWN(addr + size);
	87
	88	for (; cursor < end; cursor++) {
	89	__free_pages_bootmem(pfn_to_page(cursor), 0);
	90	totalram_pages++;
	91	}
	92	}
	93
	94	static void __init __free_pages_memory(unsigned long start, unsigned long end)
	95	{
309d0b39	96	int order;
09325873	97
309d0b39 RH	98	while (start < end) {
309d0b39 RH	99	order = min(MAX_ORDER - 1UL, __ffs(start));
09325873	100
309d0b39 RH	101	while (start + (1UL << order) > end)
309d0b39 RH	102	order--;
09325873	103
309d0b39	104	__free_pages_bootmem(pfn_to_page(start), order);
09325873	105
309d0b39 RH	106	start += (1UL << order);
309d0b39 RH	107	}
09325873 YL	108	}
09325873 YL	109
29f67386 YL	110	static unsigned long __init __free_memory_core(phys_addr_t start,
	111	phys_addr_t end)
	112	{
	113	unsigned long start_pfn = PFN_UP(start);
	114	unsigned long end_pfn = min_t(unsigned long,
	115	PFN_DOWN(end), max_low_pfn);
	116
	117	if (start_pfn > end_pfn)
	118	return 0;
	119
	120	__free_pages_memory(start_pfn, end_pfn);
	121
	122	return end_pfn - start_pfn;
	123	}
	124
b4def350	125	static unsigned long __init free_low_memory_core_early(void)
09325873	126	{
09325873	127	unsigned long count = 0;
354f17e1	128	phys_addr_t start, end;
8a9ca34c TH	129	u64 i;
8a9ca34c TH	130
0a313a99 XQ	131	memblock_clear_hotplug(0, -1);
0a313a99 XQ	132
fc6daaf9 TL	133	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
fc6daaf9 TL	134	NULL)
29f67386 YL	135	count += __free_memory_core(start, end);
29f67386 YL	136
5e270e25	137	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
354f17e1 PH	138	{
	139	phys_addr_t size;
	140
	141	/* Free memblock.reserved array if it was allocated */
	142	size = get_allocated_memblock_reserved_regions_info(&start);
	143	if (size)
	144	count += __free_memory_core(start, start + size);
	145
	146	/* Free memblock.memory array if it was allocated */
	147	size = get_allocated_memblock_memory_regions_info(&start);
	148	if (size)
	149	count += __free_memory_core(start, start + size);
	150	}
5e270e25 PH	151	#endif
5e270e25 PH	152
09325873 YL	153	return count;
	154	}
	155
7b4b2a0d JL	156	static int reset_managed_pages_done __initdata;
7b4b2a0d JL	157
f784a3f1	158	void reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d JL	159	{
	160	struct zone *z;
	161
9feedc9d	162	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d JL	163	z->managed_pages = 0;
	164	}
	165
	166	void __init reset_all_zones_managed_pages(void)
	167	{
	168	struct pglist_data *pgdat;
	169
f784a3f1 TC	170	if (reset_managed_pages_done)
	171	return;
	172
7b4b2a0d JL	173	for_each_online_pgdat(pgdat)
7b4b2a0d JL	174	reset_node_managed_pages(pgdat);
f784a3f1	175
7b4b2a0d	176	reset_managed_pages_done = 1;
9feedc9d JL	177	}
9feedc9d JL	178
09325873 YL	179	/**
	180	* free_all_bootmem - release free pages to the buddy allocator
	181	*
	182	* Returns the number of pages actually released.
	183	*/
	184	unsigned long __init free_all_bootmem(void)
	185	{
0c988534 JL	186	unsigned long pages;
0c988534 JL	187
7b4b2a0d	188	reset_all_zones_managed_pages();
9feedc9d	189
09325873	190	/*
b1154233	191	* We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
25985edc	192	* because in some case like Node0 doesn't have RAM installed
09325873	193	* low ram will be on Node1
09325873	194	*/
0c988534 JL	195	pages = free_low_memory_core_early();
	196	totalram_pages += pages;
	197
	198	return pages;
09325873 YL	199	}
	200
	201	/**
	202	* free_bootmem_node - mark a page range as usable
	203	* @pgdat: node the range resides on
	204	* @physaddr: starting address of the range
	205	* @size: size of the range in bytes
	206	*
	207	* Partial pages will be considered reserved and left as they are.
	208	*
	209	* The range must reside completely on the specified node.
	210	*/
	211	void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
	212	unsigned long size)
	213	{
24aa0788	214	memblock_free(physaddr, size);
09325873 YL	215	}
	216
	217	/**
	218	* free_bootmem - mark a page range as usable
	219	* @addr: starting address of the range
	220	* @size: size of the range in bytes
	221	*
	222	* Partial pages will be considered reserved and left as they are.
	223	*
	224	* The range must be contiguous but may span node boundaries.
	225	*/
	226	void __init free_bootmem(unsigned long addr, unsigned long size)
	227	{
24aa0788	228	memblock_free(addr, size);
09325873 YL	229	}
	230
	231	static void * __init ___alloc_bootmem_nopanic(unsigned long size,
	232	unsigned long align,
	233	unsigned long goal,
	234	unsigned long limit)
	235	{
	236	void *ptr;
	237
	238	if (WARN_ON_ONCE(slab_is_available()))
	239	return kzalloc(size, GFP_NOWAIT);
	240
	241	restart:
	242
b1154233	243	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
09325873 YL	244
	245	if (ptr)
	246	return ptr;
	247
	248	if (goal != 0) {
	249	goal = 0;
	250	goto restart;
	251	}
	252
	253	return NULL;
	254	}
	255
	256	/**
	257	* __alloc_bootmem_nopanic - allocate boot memory without panicking
	258	* @size: size of the request in bytes
	259	* @align: alignment of the region
	260	* @goal: preferred starting address of the region
	261	*
	262	* The goal is dropped if it can not be satisfied and the allocation will
	263	* fall back to memory below @goal.
	264	*
	265	* Allocation may happen on any node in the system.
	266	*
	267	* Returns NULL on failure.
	268	*/
	269	void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
	270	unsigned long goal)
	271	{
	272	unsigned long limit = -1UL;
	273
	274	return ___alloc_bootmem_nopanic(size, align, goal, limit);
	275	}
	276
	277	static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
	278	unsigned long goal, unsigned long limit)
	279	{
	280	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
	281
	282	if (mem)
	283	return mem;
	284	/*
	285	* Whoops, we cannot satisfy the allocation request.
	286	*/
	287	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	288	panic("Out of memory");
	289	return NULL;
	290	}
	291
	292	/**
	293	* __alloc_bootmem - allocate boot memory
	294	* @size: size of the request in bytes
	295	* @align: alignment of the region
	296	* @goal: preferred starting address of the region
	297	*
	298	* The goal is dropped if it can not be satisfied and the allocation will
	299	* fall back to memory below @goal.
	300	*
	301	* Allocation may happen on any node in the system.
	302	*
	303	* The function panics if the request can not be satisfied.
	304	*/
	305	void * __init __alloc_bootmem(unsigned long size, unsigned long align,
	306	unsigned long goal)
	307	{
308	unsigned long limit = -1UL;
309
310	return ___alloc_bootmem(size, align, goal, limit);
311	}
312
99ab7b19	313	void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
ba539868 JW	314	unsigned long size,
	315	unsigned long align,
	316	unsigned long goal,
	317	unsigned long limit)
	318	{
	319	void *ptr;
	320
	321	again:
	322	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
	323	goal, limit);
	324	if (ptr)
	325	return ptr;
	326
b1154233	327	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
ba539868 JW	328	goal, limit);
	329	if (ptr)
	330	return ptr;
	331
	332	if (goal) {
	333	goal = 0;
	334	goto again;
	335	}
	336
	337	return NULL;
	338	}
	339
	340	void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
	341	unsigned long align, unsigned long goal)
	342	{
	343	if (WARN_ON_ONCE(slab_is_available()))
	344	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	345
	346	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
	347	}
	348
de498507	349	static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
ba539868 JW	350	unsigned long align, unsigned long goal,
	351	unsigned long limit)
	352	{
	353	void *ptr;
	354
	355	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	356	if (ptr)
	357	return ptr;
	358
	359	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	360	panic("Out of memory");
	361	return NULL;
	362	}
	363
09325873 YL	364	/**
	365	* __alloc_bootmem_node - allocate boot memory from a specific node
	366	* @pgdat: node to allocate from
	367	* @size: size of the request in bytes
	368	* @align: alignment of the region
	369	* @goal: preferred starting address of the region
	370	*
	371	* The goal is dropped if it can not be satisfied and the allocation will
	372	* fall back to memory below @goal.
	373	*
	374	* Allocation may fall back to any node in the system if the specified node
	375	* can not hold the requested memory.
	376	*
	377	* The function panics if the request can not be satisfied.
	378	*/
	379	void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
	380	unsigned long align, unsigned long goal)
	381	{
09325873 YL	382	if (WARN_ON_ONCE(slab_is_available()))
	383	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	384
ba539868	385	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
09325873 YL	386	}
	387
	388	void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
	389	unsigned long align, unsigned long goal)
	390	{
09325873	391	return __alloc_bootmem_node(pgdat, size, align, goal);
09325873 YL	392	}
09325873 YL	393
09325873 YL	394	#ifndef ARCH_LOW_ADDRESS_LIMIT
	395	#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
	396	#endif
	397
	398	/**
	399	* __alloc_bootmem_low - allocate low boot memory
	400	* @size: size of the request in bytes
	401	* @align: alignment of the region
	402	* @goal: preferred starting address of the region
	403	*
	404	* The goal is dropped if it can not be satisfied and the allocation will
	405	* fall back to memory below @goal.
	406	*
	407	* Allocation may happen on any node in the system.
	408	*
	409	* The function panics if the request can not be satisfied.
	410	*/
	411	void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
	412	unsigned long goal)
	413	{
	414	return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
	415	}
	416
38fa4175 YL	417	void * __init __alloc_bootmem_low_nopanic(unsigned long size,
	418	unsigned long align,
	419	unsigned long goal)
	420	{
	421	return ___alloc_bootmem_nopanic(size, align, goal,
	422	ARCH_LOW_ADDRESS_LIMIT);
	423	}
	424
09325873 YL	425	/**
	426	* __alloc_bootmem_low_node - allocate low boot memory from a specific node
	427	* @pgdat: node to allocate from
	428	* @size: size of the request in bytes
	429	* @align: alignment of the region
	430	* @goal: preferred starting address of the region
	431	*
	432	* The goal is dropped if it can not be satisfied and the allocation will
	433	* fall back to memory below @goal.
	434	*
	435	* Allocation may fall back to any node in the system if the specified node
	436	* can not hold the requested memory.
	437	*
	438	* The function panics if the request can not be satisfied.
	439	*/
	440	void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
	441	unsigned long align, unsigned long goal)
	442	{
09325873 YL	443	if (WARN_ON_ONCE(slab_is_available()))
	444	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	445
ba539868 JW	446	return ___alloc_bootmem_node(pgdat, size, align, goal,
ba539868 JW	447	ARCH_LOW_ADDRESS_LIMIT);
09325873	448	}