[linux.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;
unsigned long long max_possible_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), 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), 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_reserved_mem_region(i, &start, &end)
		reserve_bootmem_region(start, end);

	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;
8dd33030	34	unsigned long long max_possible_pfn;
09325873	35
8bc1f91e YL	36	static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
	37	u64 goal, u64 limit)
	38	{
	39	void *ptr;
	40	u64 addr;
a3f5bafc	41	ulong flags = choose_memblock_flags();
8bc1f91e YL	42
	43	if (limit > memblock.current_limit)
	44	limit = memblock.current_limit;
	45
a3f5bafc	46	again:
fc6daaf9	47	addr = memblock_find_in_range_node(size, align, goal, limit, nid,
a3f5bafc TL	48	flags);
	49	if (!addr && (flags & MEMBLOCK_MIRROR)) {
	50	flags &= ~MEMBLOCK_MIRROR;
	51	pr_warn("Could not allocate %pap bytes of mirrored memory\n",
	52	&size);
	53	goto again;
	54	}
1f5026a7	55	if (!addr)
8bc1f91e YL	56	return NULL;
8bc1f91e YL	57
87379ec8 PH	58	if (memblock_reserve(addr, size))
	59	return NULL;
	60
8bc1f91e YL	61	ptr = phys_to_virt(addr);
8bc1f91e YL	62	memset(ptr, 0, size);
8bc1f91e YL	63	/*
	64	* The min_count is set to 0 so that bootmem allocated blocks
	65	* are never reported as leaks.
	66	*/
	67	kmemleak_alloc(ptr, size, 0, 0);
	68	return ptr;
	69	}
	70
09325873 YL	71	/*
	72	* free_bootmem_late - free bootmem pages directly to page allocator
	73	* @addr: starting address of the range
	74	* @size: size of the range in bytes
	75	*
	76	* This is only useful when the bootmem allocator has already been torn
	77	* down, but we are still initializing the system. Pages are given directly
	78	* to the page allocator, no bootmem metadata is updated because it is gone.
	79	*/
	80	void __init free_bootmem_late(unsigned long addr, unsigned long size)
	81	{
	82	unsigned long cursor, end;
	83
	84	kmemleak_free_part(__va(addr), size);
	85
	86	cursor = PFN_UP(addr);
	87	end = PFN_DOWN(addr + size);
	88
	89	for (; cursor < end; cursor++) {
d70ddd7a	90	__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
09325873 YL	91	totalram_pages++;
	92	}
	93	}
	94
	95	static void __init __free_pages_memory(unsigned long start, unsigned long end)
	96	{
309d0b39	97	int order;
09325873	98
309d0b39 RH	99	while (start < end) {
309d0b39 RH	100	order = min(MAX_ORDER - 1UL, __ffs(start));
09325873	101
309d0b39 RH	102	while (start + (1UL << order) > end)
309d0b39 RH	103	order--;
09325873	104
d70ddd7a	105	__free_pages_bootmem(pfn_to_page(start), start, order);
09325873	106
309d0b39 RH	107	start += (1UL << order);
309d0b39 RH	108	}
09325873 YL	109	}
09325873 YL	110
29f67386 YL	111	static unsigned long __init __free_memory_core(phys_addr_t start,
	112	phys_addr_t end)
	113	{
	114	unsigned long start_pfn = PFN_UP(start);
	115	unsigned long end_pfn = min_t(unsigned long,
	116	PFN_DOWN(end), max_low_pfn);
	117
	118	if (start_pfn > end_pfn)
	119	return 0;
	120
	121	__free_pages_memory(start_pfn, end_pfn);
	122
	123	return end_pfn - start_pfn;
	124	}
	125
b4def350	126	static unsigned long __init free_low_memory_core_early(void)
09325873	127	{
09325873	128	unsigned long count = 0;
354f17e1	129	phys_addr_t start, end;
8a9ca34c TH	130	u64 i;
8a9ca34c TH	131
0a313a99 XQ	132	memblock_clear_hotplug(0, -1);
0a313a99 XQ	133
92923ca3 NZ	134	for_each_reserved_mem_region(i, &start, &end)
	135	reserve_bootmem_region(start, end);
	136
fc6daaf9 TL	137	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
fc6daaf9 TL	138	NULL)
29f67386 YL	139	count += __free_memory_core(start, end);
29f67386 YL	140
5e270e25	141	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
354f17e1 PH	142	{
	143	phys_addr_t size;
	144
	145	/* Free memblock.reserved array if it was allocated */
	146	size = get_allocated_memblock_reserved_regions_info(&start);
	147	if (size)
	148	count += __free_memory_core(start, start + size);
	149
	150	/* Free memblock.memory array if it was allocated */
	151	size = get_allocated_memblock_memory_regions_info(&start);
	152	if (size)
	153	count += __free_memory_core(start, start + size);
	154	}
5e270e25 PH	155	#endif
5e270e25 PH	156
09325873 YL	157	return count;
	158	}
	159
7b4b2a0d JL	160	static int reset_managed_pages_done __initdata;
7b4b2a0d JL	161
f784a3f1	162	void reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d JL	163	{
	164	struct zone *z;
	165
9feedc9d	166	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d JL	167	z->managed_pages = 0;
	168	}
	169
	170	void __init reset_all_zones_managed_pages(void)
	171	{
	172	struct pglist_data *pgdat;
	173
f784a3f1 TC	174	if (reset_managed_pages_done)
	175	return;
	176
7b4b2a0d JL	177	for_each_online_pgdat(pgdat)
7b4b2a0d JL	178	reset_node_managed_pages(pgdat);
f784a3f1	179
7b4b2a0d	180	reset_managed_pages_done = 1;
9feedc9d JL	181	}
9feedc9d JL	182
09325873 YL	183	/**
	184	* free_all_bootmem - release free pages to the buddy allocator
	185	*
	186	* Returns the number of pages actually released.
	187	*/
	188	unsigned long __init free_all_bootmem(void)
	189	{
0c988534 JL	190	unsigned long pages;
0c988534 JL	191
7b4b2a0d	192	reset_all_zones_managed_pages();
9feedc9d	193
09325873	194	/*
b1154233	195	* We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
25985edc	196	* because in some case like Node0 doesn't have RAM installed
09325873	197	* low ram will be on Node1
09325873	198	*/
0c988534 JL	199	pages = free_low_memory_core_early();
	200	totalram_pages += pages;
	201
	202	return pages;
09325873 YL	203	}
	204
	205	/**
	206	* free_bootmem_node - mark a page range as usable
	207	* @pgdat: node the range resides on
	208	* @physaddr: starting address of the range
	209	* @size: size of the range in bytes
	210	*
	211	* Partial pages will be considered reserved and left as they are.
	212	*
	213	* The range must reside completely on the specified node.
	214	*/
	215	void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
	216	unsigned long size)
	217	{
24aa0788	218	memblock_free(physaddr, size);
09325873 YL	219	}
	220
	221	/**
	222	* free_bootmem - mark a page range as usable
	223	* @addr: starting address of the range
	224	* @size: size of the range in bytes
	225	*
	226	* Partial pages will be considered reserved and left as they are.
	227	*
	228	* The range must be contiguous but may span node boundaries.
	229	*/
	230	void __init free_bootmem(unsigned long addr, unsigned long size)
	231	{
24aa0788	232	memblock_free(addr, size);
09325873 YL	233	}
	234
	235	static void * __init ___alloc_bootmem_nopanic(unsigned long size,
	236	unsigned long align,
	237	unsigned long goal,
	238	unsigned long limit)
	239	{
	240	void *ptr;
	241
	242	if (WARN_ON_ONCE(slab_is_available()))
	243	return kzalloc(size, GFP_NOWAIT);
	244
	245	restart:
	246
b1154233	247	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
09325873 YL	248
	249	if (ptr)
	250	return ptr;
	251
	252	if (goal != 0) {
	253	goal = 0;
	254	goto restart;
	255	}
	256
	257	return NULL;
	258	}
	259
	260	/**
	261	* __alloc_bootmem_nopanic - allocate boot memory without panicking
	262	* @size: size of the request in bytes
	263	* @align: alignment of the region
	264	* @goal: preferred starting address of the region
	265	*
	266	* The goal is dropped if it can not be satisfied and the allocation will
	267	* fall back to memory below @goal.
	268	*
	269	* Allocation may happen on any node in the system.
	270	*
	271	* Returns NULL on failure.
	272	*/
	273	void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
	274	unsigned long goal)
	275	{
	276	unsigned long limit = -1UL;
	277
	278	return ___alloc_bootmem_nopanic(size, align, goal, limit);
	279	}
	280
	281	static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
	282	unsigned long goal, unsigned long limit)
	283	{
	284	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
	285
	286	if (mem)
	287	return mem;
	288	/*
	289	* Whoops, we cannot satisfy the allocation request.
	290	*/
	291	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	292	panic("Out of memory");
	293	return NULL;
	294	}
	295
	296	/**
	297	* __alloc_bootmem - allocate boot memory
	298	* @size: size of the request in bytes
	299	* @align: alignment of the region
	300	* @goal: preferred starting address of the region
	301	*
	302	* The goal is dropped if it can not be satisfied and the allocation will
	303	* fall back to memory below @goal.
	304	*
	305	* Allocation may happen on any node in the system.
	306	*
	307	* The function panics if the request can not be satisfied.
	308	*/
	309	void * __init __alloc_bootmem(unsigned long size, unsigned long align,
	310	unsigned long goal)
	311	{
312	unsigned long limit = -1UL;
313
314	return ___alloc_bootmem(size, align, goal, limit);
315	}
316
99ab7b19	317	void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
ba539868 JW	318	unsigned long size,
	319	unsigned long align,
	320	unsigned long goal,
	321	unsigned long limit)
	322	{
	323	void *ptr;
	324
	325	again:
	326	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
	327	goal, limit);
	328	if (ptr)
	329	return ptr;
	330
b1154233	331	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
ba539868 JW	332	goal, limit);
	333	if (ptr)
	334	return ptr;
	335
	336	if (goal) {
	337	goal = 0;
	338	goto again;
	339	}
	340
	341	return NULL;
	342	}
	343
	344	void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
	345	unsigned long align, unsigned long goal)
	346	{
	347	if (WARN_ON_ONCE(slab_is_available()))
	348	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	349
	350	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
	351	}
	352
de498507	353	static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
ba539868 JW	354	unsigned long align, unsigned long goal,
	355	unsigned long limit)
	356	{
	357	void *ptr;
	358
	359	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	360	if (ptr)
	361	return ptr;
	362
	363	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	364	panic("Out of memory");
	365	return NULL;
	366	}
	367
09325873 YL	368	/**
	369	* __alloc_bootmem_node - allocate boot memory from a specific node
	370	* @pgdat: node to allocate from
	371	* @size: size of the request in bytes
	372	* @align: alignment of the region
	373	* @goal: preferred starting address of the region
	374	*
	375	* The goal is dropped if it can not be satisfied and the allocation will
	376	* fall back to memory below @goal.
	377	*
	378	* Allocation may fall back to any node in the system if the specified node
	379	* can not hold the requested memory.
	380	*
	381	* The function panics if the request can not be satisfied.
	382	*/
	383	void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
	384	unsigned long align, unsigned long goal)
	385	{
09325873 YL	386	if (WARN_ON_ONCE(slab_is_available()))
	387	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	388
ba539868	389	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
09325873 YL	390	}
	391
	392	void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
	393	unsigned long align, unsigned long goal)
	394	{
09325873	395	return __alloc_bootmem_node(pgdat, size, align, goal);
09325873 YL	396	}
09325873 YL	397
09325873 YL	398	#ifndef ARCH_LOW_ADDRESS_LIMIT
	399	#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
	400	#endif
	401
	402	/**
	403	* __alloc_bootmem_low - allocate low boot memory
	404	* @size: size of the request in bytes
	405	* @align: alignment of the region
	406	* @goal: preferred starting address of the region
	407	*
	408	* The goal is dropped if it can not be satisfied and the allocation will
	409	* fall back to memory below @goal.
	410	*
	411	* Allocation may happen on any node in the system.
	412	*
	413	* The function panics if the request can not be satisfied.
	414	*/
	415	void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
	416	unsigned long goal)
	417	{
	418	return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
	419	}
	420
38fa4175 YL	421	void * __init __alloc_bootmem_low_nopanic(unsigned long size,
	422	unsigned long align,
	423	unsigned long goal)
	424	{
	425	return ___alloc_bootmem_nopanic(size, align, goal,
	426	ARCH_LOW_ADDRESS_LIMIT);
	427	}
	428
09325873 YL	429	/**
	430	* __alloc_bootmem_low_node - allocate low boot memory from a specific node
	431	* @pgdat: node to allocate from
	432	* @size: size of the request in bytes
	433	* @align: alignment of the region
	434	* @goal: preferred starting address of the region
	435	*
	436	* The goal is dropped if it can not be satisfied and the allocation will
	437	* fall back to memory below @goal.
	438	*
	439	* Allocation may fall back to any node in the system if the specified node
	440	* can not hold the requested memory.
	441	*
	442	* The function panics if the request can not be satisfied.
	443	*/
	444	void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
	445	unsigned long align, unsigned long goal)
	446	{
09325873 YL	447	if (WARN_ON_ONCE(slab_is_available()))
	448	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	449
ba539868 JW	450	return ___alloc_bootmem_node(pgdat, size, align, goal,
ba539868 JW	451	ARCH_LOW_ADDRESS_LIMIT);
09325873	452	}