[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), 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;
	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++) {
d70ddd7a	89	__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
09325873 YL	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
d70ddd7a	104	__free_pages_bootmem(pfn_to_page(start), 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
92923ca3 NZ	133	for_each_reserved_mem_region(i, &start, &end)
	134	reserve_bootmem_region(start, end);
	135
fc6daaf9 TL	136	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
fc6daaf9 TL	137	NULL)
29f67386 YL	138	count += __free_memory_core(start, end);
29f67386 YL	139
5e270e25	140	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
354f17e1 PH	141	{
	142	phys_addr_t size;
	143
	144	/* Free memblock.reserved array if it was allocated */
	145	size = get_allocated_memblock_reserved_regions_info(&start);
	146	if (size)
	147	count += __free_memory_core(start, start + size);
	148
	149	/* Free memblock.memory array if it was allocated */
	150	size = get_allocated_memblock_memory_regions_info(&start);
	151	if (size)
	152	count += __free_memory_core(start, start + size);
	153	}
5e270e25 PH	154	#endif
5e270e25 PH	155
09325873 YL	156	return count;
	157	}
	158
7b4b2a0d JL	159	static int reset_managed_pages_done __initdata;
7b4b2a0d JL	160
f784a3f1	161	void reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d JL	162	{
	163	struct zone *z;
	164
9feedc9d	165	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d JL	166	z->managed_pages = 0;
	167	}
	168
	169	void __init reset_all_zones_managed_pages(void)
	170	{
	171	struct pglist_data *pgdat;
	172
f784a3f1 TC	173	if (reset_managed_pages_done)
	174	return;
	175
7b4b2a0d JL	176	for_each_online_pgdat(pgdat)
7b4b2a0d JL	177	reset_node_managed_pages(pgdat);
f784a3f1	178
7b4b2a0d	179	reset_managed_pages_done = 1;
9feedc9d JL	180	}
9feedc9d JL	181
09325873 YL	182	/**
	183	* free_all_bootmem - release free pages to the buddy allocator
	184	*
	185	* Returns the number of pages actually released.
	186	*/
	187	unsigned long __init free_all_bootmem(void)
	188	{
0c988534 JL	189	unsigned long pages;
0c988534 JL	190
7b4b2a0d	191	reset_all_zones_managed_pages();
9feedc9d	192
09325873	193	/*
b1154233	194	* We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
25985edc	195	* because in some case like Node0 doesn't have RAM installed
09325873	196	* low ram will be on Node1
09325873	197	*/
0c988534 JL	198	pages = free_low_memory_core_early();
	199	totalram_pages += pages;
	200
	201	return pages;
09325873 YL	202	}
	203
	204	/**
	205	* free_bootmem_node - mark a page range as usable
	206	* @pgdat: node the range resides on
	207	* @physaddr: starting address of the range
	208	* @size: size of the range in bytes
	209	*
	210	* Partial pages will be considered reserved and left as they are.
	211	*
	212	* The range must reside completely on the specified node.
	213	*/
	214	void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
	215	unsigned long size)
	216	{
24aa0788	217	memblock_free(physaddr, size);
09325873 YL	218	}
	219
	220	/**
	221	* free_bootmem - mark a page range as usable
	222	* @addr: starting address of the range
	223	* @size: size of the range in bytes
	224	*
	225	* Partial pages will be considered reserved and left as they are.
	226	*
	227	* The range must be contiguous but may span node boundaries.
	228	*/
	229	void __init free_bootmem(unsigned long addr, unsigned long size)
	230	{
24aa0788	231	memblock_free(addr, size);
09325873 YL	232	}
	233
	234	static void * __init ___alloc_bootmem_nopanic(unsigned long size,
	235	unsigned long align,
	236	unsigned long goal,
	237	unsigned long limit)
	238	{
	239	void *ptr;
	240
	241	if (WARN_ON_ONCE(slab_is_available()))
	242	return kzalloc(size, GFP_NOWAIT);
	243
	244	restart:
	245
b1154233	246	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
09325873 YL	247
	248	if (ptr)
	249	return ptr;
	250
	251	if (goal != 0) {
	252	goal = 0;
	253	goto restart;
	254	}
	255
	256	return NULL;
	257	}
	258
	259	/**
	260	* __alloc_bootmem_nopanic - allocate boot memory without panicking
	261	* @size: size of the request in bytes
	262	* @align: alignment of the region
	263	* @goal: preferred starting address of the region
	264	*
	265	* The goal is dropped if it can not be satisfied and the allocation will
	266	* fall back to memory below @goal.
	267	*
	268	* Allocation may happen on any node in the system.
	269	*
	270	* Returns NULL on failure.
	271	*/
	272	void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
	273	unsigned long goal)
	274	{
	275	unsigned long limit = -1UL;
	276
	277	return ___alloc_bootmem_nopanic(size, align, goal, limit);
	278	}
	279
	280	static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
	281	unsigned long goal, unsigned long limit)
	282	{
	283	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
	284
	285	if (mem)
	286	return mem;
	287	/*
	288	* Whoops, we cannot satisfy the allocation request.
	289	*/
	290	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	291	panic("Out of memory");
	292	return NULL;
	293	}
	294
	295	/**
	296	* __alloc_bootmem - allocate boot memory
	297	* @size: size of the request in bytes
	298	* @align: alignment of the region
	299	* @goal: preferred starting address of the region
	300	*
	301	* The goal is dropped if it can not be satisfied and the allocation will
	302	* fall back to memory below @goal.
	303	*
	304	* Allocation may happen on any node in the system.
	305	*
	306	* The function panics if the request can not be satisfied.
	307	*/
	308	void * __init __alloc_bootmem(unsigned long size, unsigned long align,
	309	unsigned long goal)
	310	{
311	unsigned long limit = -1UL;
312
313	return ___alloc_bootmem(size, align, goal, limit);
314	}
315
99ab7b19	316	void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
ba539868 JW	317	unsigned long size,
	318	unsigned long align,
	319	unsigned long goal,
	320	unsigned long limit)
	321	{
	322	void *ptr;
	323
	324	again:
	325	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
	326	goal, limit);
	327	if (ptr)
	328	return ptr;
	329
b1154233	330	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
ba539868 JW	331	goal, limit);
	332	if (ptr)
	333	return ptr;
	334
	335	if (goal) {
	336	goal = 0;
	337	goto again;
	338	}
	339
	340	return NULL;
	341	}
	342
	343	void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
	344	unsigned long align, unsigned long goal)
	345	{
	346	if (WARN_ON_ONCE(slab_is_available()))
	347	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	348
	349	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
	350	}
	351
de498507	352	static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
ba539868 JW	353	unsigned long align, unsigned long goal,
	354	unsigned long limit)
	355	{
	356	void *ptr;
	357
	358	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	359	if (ptr)
	360	return ptr;
	361
	362	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
	363	panic("Out of memory");
	364	return NULL;
	365	}
	366
09325873 YL	367	/**
	368	* __alloc_bootmem_node - allocate boot memory from a specific node
	369	* @pgdat: node to allocate from
	370	* @size: size of the request in bytes
	371	* @align: alignment of the region
	372	* @goal: preferred starting address of the region
	373	*
	374	* The goal is dropped if it can not be satisfied and the allocation will
	375	* fall back to memory below @goal.
	376	*
	377	* Allocation may fall back to any node in the system if the specified node
	378	* can not hold the requested memory.
	379	*
	380	* The function panics if the request can not be satisfied.
	381	*/
	382	void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
	383	unsigned long align, unsigned long goal)
	384	{
09325873 YL	385	if (WARN_ON_ONCE(slab_is_available()))
	386	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	387
ba539868	388	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
09325873 YL	389	}
	390
	391	void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
	392	unsigned long align, unsigned long goal)
	393	{
09325873	394	return __alloc_bootmem_node(pgdat, size, align, goal);
09325873 YL	395	}
09325873 YL	396
09325873 YL	397	#ifndef ARCH_LOW_ADDRESS_LIMIT
	398	#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
	399	#endif
	400
	401	/**
	402	* __alloc_bootmem_low - allocate low boot memory
	403	* @size: size of the request in bytes
	404	* @align: alignment of the region
	405	* @goal: preferred starting address of the region
	406	*
	407	* The goal is dropped if it can not be satisfied and the allocation will
	408	* fall back to memory below @goal.
	409	*
	410	* Allocation may happen on any node in the system.
	411	*
	412	* The function panics if the request can not be satisfied.
	413	*/
	414	void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
	415	unsigned long goal)
	416	{
	417	return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
	418	}
	419
38fa4175 YL	420	void * __init __alloc_bootmem_low_nopanic(unsigned long size,
	421	unsigned long align,
	422	unsigned long goal)
	423	{
	424	return ___alloc_bootmem_nopanic(size, align, goal,
	425	ARCH_LOW_ADDRESS_LIMIT);
	426	}
	427
09325873 YL	428	/**
	429	* __alloc_bootmem_low_node - allocate low boot memory from a specific node
	430	* @pgdat: node to allocate from
	431	* @size: size of the request in bytes
	432	* @align: alignment of the region
	433	* @goal: preferred starting address of the region
	434	*
	435	* The goal is dropped if it can not be satisfied and the allocation will
	436	* fall back to memory below @goal.
	437	*
	438	* Allocation may fall back to any node in the system if the specified node
	439	* can not hold the requested memory.
	440	*
	441	* The function panics if the request can not be satisfied.
	442	*/
	443	void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
	444	unsigned long align, unsigned long goal)
	445	{
09325873 YL	446	if (WARN_ON_ONCE(slab_is_available()))
	447	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	448
ba539868 JW	449	return ___alloc_bootmem_node(pgdat, size, align, goal,
ba539868 JW	450	ARCH_LOW_ADDRESS_LIMIT);
09325873	451	}