[mirror_ubuntu-zesty-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/export.h>
#include <linux/kmemleak.h>
#include <linux/range.h>
#include <linux/memblock.h>
#include <linux/bootmem.h>

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

#include "internal.h"

#ifndef CONFIG_HAVE_MEMBLOCK
#error CONFIG_HAVE_MEMBLOCK not defined
#endif

#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_phys(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);

	/*
	 * 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
	 */
	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();

	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.
	 */
	pr_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;

	pr_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);
}


/**
 * __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>
b95f1b31	14	#include <linux/export.h>
09325873 YL	15	#include <linux/kmemleak.h>
	16	#include <linux/range.h>
	17	#include <linux/memblock.h>
2382705f	18	#include <linux/bootmem.h>
09325873 YL	19
	20	#include <asm/bug.h>
	21	#include <asm/io.h>
09325873 YL	22
	23	#include "internal.h"
	24
2382705f	25	#ifndef CONFIG_HAVE_MEMBLOCK
	26	#error CONFIG_HAVE_MEMBLOCK not defined
	27	#endif
	28
e782ab42 YL	29	#ifndef CONFIG_NEED_MULTIPLE_NODES
	30	struct pglist_data __refdata contig_page_data;
	31	EXPORT_SYMBOL(contig_page_data);
	32	#endif
	33
09325873 YL	34	unsigned long max_low_pfn;
	35	unsigned long min_low_pfn;
	36	unsigned long max_pfn;
8dd33030	37	unsigned long long max_possible_pfn;
09325873	38
8bc1f91e YL	39	static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
	40	u64 goal, u64 limit)
	41	{
	42	void *ptr;
	43	u64 addr;
a3f5bafc	44	ulong flags = choose_memblock_flags();
8bc1f91e YL	45
	46	if (limit > memblock.current_limit)
	47	limit = memblock.current_limit;
	48
a3f5bafc	49	again:
fc6daaf9	50	addr = memblock_find_in_range_node(size, align, goal, limit, nid,
a3f5bafc TL	51	flags);
	52	if (!addr && (flags & MEMBLOCK_MIRROR)) {
	53	flags &= ~MEMBLOCK_MIRROR;
	54	pr_warn("Could not allocate %pap bytes of mirrored memory\n",
	55	&size);
	56	goto again;
	57	}
1f5026a7	58	if (!addr)
8bc1f91e YL	59	return NULL;
8bc1f91e YL	60
87379ec8 PH	61	if (memblock_reserve(addr, size))
	62	return NULL;
	63
8bc1f91e YL	64	ptr = phys_to_virt(addr);
8bc1f91e YL	65	memset(ptr, 0, size);
8bc1f91e YL	66	/*
	67	* The min_count is set to 0 so that bootmem allocated blocks
	68	* are never reported as leaks.
	69	*/
	70	kmemleak_alloc(ptr, size, 0, 0);
	71	return ptr;
	72	}
	73
09325873 YL	74	/*
	75	* free_bootmem_late - free bootmem pages directly to page allocator
	76	* @addr: starting address of the range
	77	* @size: size of the range in bytes
	78	*
	79	* This is only useful when the bootmem allocator has already been torn
	80	* down, but we are still initializing the system. Pages are given directly
	81	* to the page allocator, no bootmem metadata is updated because it is gone.
	82	*/
	83	void __init free_bootmem_late(unsigned long addr, unsigned long size)
	84	{
	85	unsigned long cursor, end;
	86
9099daed	87	kmemleak_free_part_phys(addr, size);
09325873 YL	88
	89	cursor = PFN_UP(addr);
	90	end = PFN_DOWN(addr + size);
	91
	92	for (; cursor < end; cursor++) {
d70ddd7a	93	__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
09325873 YL	94	totalram_pages++;
	95	}
	96	}
	97
	98	static void __init __free_pages_memory(unsigned long start, unsigned long end)
	99	{
309d0b39	100	int order;
09325873	101
309d0b39 RH	102	while (start < end) {
309d0b39 RH	103	order = min(MAX_ORDER - 1UL, __ffs(start));
09325873	104
309d0b39 RH	105	while (start + (1UL << order) > end)
309d0b39 RH	106	order--;
09325873	107
d70ddd7a	108	__free_pages_bootmem(pfn_to_page(start), start, order);
09325873	109
309d0b39 RH	110	start += (1UL << order);
309d0b39 RH	111	}
09325873 YL	112	}
09325873 YL	113
29f67386 YL	114	static unsigned long __init __free_memory_core(phys_addr_t start,
	115	phys_addr_t end)
	116	{
	117	unsigned long start_pfn = PFN_UP(start);
	118	unsigned long end_pfn = min_t(unsigned long,
	119	PFN_DOWN(end), max_low_pfn);
	120
	121	if (start_pfn > end_pfn)
	122	return 0;
	123
	124	__free_pages_memory(start_pfn, end_pfn);
	125
	126	return end_pfn - start_pfn;
	127	}
	128
b4def350	129	static unsigned long __init free_low_memory_core_early(void)
09325873	130	{
09325873	131	unsigned long count = 0;
354f17e1	132	phys_addr_t start, end;
8a9ca34c TH	133	u64 i;
8a9ca34c TH	134
0a313a99 XQ	135	memblock_clear_hotplug(0, -1);
0a313a99 XQ	136
92923ca3 NZ	137	for_each_reserved_mem_region(i, &start, &end)
	138	reserve_bootmem_region(start, end);
	139
914a0516 WG	140	/*
	141	* We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
	142	* because in some case like Node0 doesn't have RAM installed
	143	* low ram will be on Node1
	144	*/
fc6daaf9 TL	145	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
fc6daaf9 TL	146	NULL)
29f67386 YL	147	count += __free_memory_core(start, end);
29f67386 YL	148
5e270e25	149	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
354f17e1 PH	150	{
	151	phys_addr_t size;
	152
	153	/* Free memblock.reserved array if it was allocated */
	154	size = get_allocated_memblock_reserved_regions_info(&start);
	155	if (size)
	156	count += __free_memory_core(start, start + size);
	157
	158	/* Free memblock.memory array if it was allocated */
	159	size = get_allocated_memblock_memory_regions_info(&start);
	160	if (size)
	161	count += __free_memory_core(start, start + size);
	162	}
5e270e25 PH	163	#endif
5e270e25 PH	164
09325873 YL	165	return count;
	166	}
	167
7b4b2a0d JL	168	static int reset_managed_pages_done __initdata;
7b4b2a0d JL	169
f784a3f1	170	void reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d JL	171	{
	172	struct zone *z;
	173
9feedc9d	174	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d JL	175	z->managed_pages = 0;
	176	}
	177
	178	void __init reset_all_zones_managed_pages(void)
	179	{
	180	struct pglist_data *pgdat;
	181
f784a3f1 TC	182	if (reset_managed_pages_done)
	183	return;
	184
7b4b2a0d JL	185	for_each_online_pgdat(pgdat)
7b4b2a0d JL	186	reset_node_managed_pages(pgdat);
f784a3f1	187
7b4b2a0d	188	reset_managed_pages_done = 1;
9feedc9d JL	189	}
9feedc9d JL	190
09325873 YL	191	/**
	192	* free_all_bootmem - release free pages to the buddy allocator
	193	*
	194	* Returns the number of pages actually released.
	195	*/
	196	unsigned long __init free_all_bootmem(void)
	197	{
0c988534 JL	198	unsigned long pages;
0c988534 JL	199
7b4b2a0d	200	reset_all_zones_managed_pages();
9feedc9d	201
0c988534 JL	202	pages = free_low_memory_core_early();
	203	totalram_pages += pages;
	204
	205	return pages;
09325873 YL	206	}
	207
	208	/**
	209	* free_bootmem_node - mark a page range as usable
	210	* @pgdat: node the range resides on
	211	* @physaddr: starting address of the range
	212	* @size: size of the range in bytes
	213	*
	214	* Partial pages will be considered reserved and left as they are.
	215	*
	216	* The range must reside completely on the specified node.
	217	*/
	218	void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
	219	unsigned long size)
	220	{
24aa0788	221	memblock_free(physaddr, size);
09325873 YL	222	}
	223
	224	/**
	225	* free_bootmem - mark a page range as usable
	226	* @addr: starting address of the range
	227	* @size: size of the range in bytes
	228	*
	229	* Partial pages will be considered reserved and left as they are.
	230	*
	231	* The range must be contiguous but may span node boundaries.
	232	*/
	233	void __init free_bootmem(unsigned long addr, unsigned long size)
	234	{
24aa0788	235	memblock_free(addr, size);
09325873 YL	236	}
	237
	238	static void * __init ___alloc_bootmem_nopanic(unsigned long size,
	239	unsigned long align,
	240	unsigned long goal,
	241	unsigned long limit)
	242	{
	243	void *ptr;
	244
	245	if (WARN_ON_ONCE(slab_is_available()))
	246	return kzalloc(size, GFP_NOWAIT);
	247
	248	restart:
	249
b1154233	250	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
09325873 YL	251
	252	if (ptr)
	253	return ptr;
	254
	255	if (goal != 0) {
	256	goal = 0;
	257	goto restart;
	258	}
	259
	260	return NULL;
	261	}
	262
	263	/**
	264	* __alloc_bootmem_nopanic - allocate boot memory without panicking
	265	* @size: size of the request in bytes
	266	* @align: alignment of the region
	267	* @goal: preferred starting address of the region
	268	*
	269	* The goal is dropped if it can not be satisfied and the allocation will
	270	* fall back to memory below @goal.
	271	*
	272	* Allocation may happen on any node in the system.
	273	*
	274	* Returns NULL on failure.
	275	*/
	276	void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
	277	unsigned long goal)
	278	{
	279	unsigned long limit = -1UL;
	280
	281	return ___alloc_bootmem_nopanic(size, align, goal, limit);
	282	}
	283
	284	static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
	285	unsigned long goal, unsigned long limit)
	286	{
	287	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
	288
	289	if (mem)
	290	return mem;
	291	/*
	292	* Whoops, we cannot satisfy the allocation request.
	293	*/
1170532b	294	pr_alert("bootmem alloc of %lu bytes failed!\n", size);
09325873 YL	295	panic("Out of memory");
	296	return NULL;
	297	}
	298
	299	/**
	300	* __alloc_bootmem - allocate boot memory
	301	* @size: size of the request in bytes
	302	* @align: alignment of the region
	303	* @goal: preferred starting address of the region
	304	*
	305	* The goal is dropped if it can not be satisfied and the allocation will
	306	* fall back to memory below @goal.
	307	*
	308	* Allocation may happen on any node in the system.
	309	*
	310	* The function panics if the request can not be satisfied.
	311	*/
	312	void * __init __alloc_bootmem(unsigned long size, unsigned long align,
	313	unsigned long goal)
	314	{
	315	unsigned long limit = -1UL;
	316
	317	return ___alloc_bootmem(size, align, goal, limit);
	318	}
	319
99ab7b19	320	void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
ba539868 JW	321	unsigned long size,
	322	unsigned long align,
	323	unsigned long goal,
	324	unsigned long limit)
	325	{
	326	void *ptr;
	327
	328	again:
	329	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
	330	goal, limit);
	331	if (ptr)
	332	return ptr;
	333
b1154233	334	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
ba539868 JW	335	goal, limit);
	336	if (ptr)
	337	return ptr;
	338
	339	if (goal) {
	340	goal = 0;
	341	goto again;
	342	}
	343
	344	return NULL;
	345	}
	346
	347	void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
	348	unsigned long align, unsigned long goal)
	349	{
	350	if (WARN_ON_ONCE(slab_is_available()))
	351	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	352
	353	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
	354	}
	355
de498507	356	static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
ba539868 JW	357	unsigned long align, unsigned long goal,
	358	unsigned long limit)
	359	{
	360	void *ptr;
	361
	362	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	363	if (ptr)
	364	return ptr;
	365
1170532b	366	pr_alert("bootmem alloc of %lu bytes failed!\n", size);
ba539868 JW	367	panic("Out of memory");
	368	return NULL;
	369	}
	370
09325873 YL	371	/**
	372	* __alloc_bootmem_node - allocate boot memory from a specific node
	373	* @pgdat: node to allocate from
	374	* @size: size of the request in bytes
	375	* @align: alignment of the region
	376	* @goal: preferred starting address of the region
	377	*
	378	* The goal is dropped if it can not be satisfied and the allocation will
	379	* fall back to memory below @goal.
	380	*
	381	* Allocation may fall back to any node in the system if the specified node
	382	* can not hold the requested memory.
	383	*
	384	* The function panics if the request can not be satisfied.
	385	*/
	386	void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
	387	unsigned long align, unsigned long goal)
	388	{
09325873 YL	389	if (WARN_ON_ONCE(slab_is_available()))
	390	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	391
ba539868	392	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
09325873 YL	393	}
	394
	395	void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
	396	unsigned long align, unsigned long goal)
	397	{
09325873	398	return __alloc_bootmem_node(pgdat, size, align, goal);
09325873 YL	399	}
09325873 YL	400
09325873 YL	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	}