[linux.git] / mm / nobootmem.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  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);

	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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
09325873 YL	2	/*
	3	* bootmem - A boot-time physical memory allocator and configurator
	4	*
	5	* Copyright (C) 1999 Ingo Molnar
	6	* 1999 Kanoj Sarcar, SGI
	7	* 2008 Johannes Weiner
	8	*
	9	* Access to this subsystem has to be serialized externally (which is true
	10	* for the boot process anyway).
	11	*/
	12	#include <linux/init.h>
	13	#include <linux/pfn.h>
	14	#include <linux/slab.h>
b95f1b31	15	#include <linux/export.h>
09325873 YL	16	#include <linux/kmemleak.h>
	17	#include <linux/range.h>
	18	#include <linux/memblock.h>
2382705f	19	#include <linux/bootmem.h>
09325873 YL	20
	21	#include <asm/bug.h>
	22	#include <asm/io.h>
09325873 YL	23
	24	#include "internal.h"
	25
2382705f	26	#ifndef CONFIG_HAVE_MEMBLOCK
	27	#error CONFIG_HAVE_MEMBLOCK not defined
	28	#endif
	29
e782ab42 YL	30	#ifndef CONFIG_NEED_MULTIPLE_NODES
	31	struct pglist_data __refdata contig_page_data;
	32	EXPORT_SYMBOL(contig_page_data);
	33	#endif
	34
09325873 YL	35	unsigned long max_low_pfn;
	36	unsigned long min_low_pfn;
	37	unsigned long max_pfn;
8dd33030	38	unsigned long long max_possible_pfn;
09325873	39
8bc1f91e YL	40	static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
	41	u64 goal, u64 limit)
	42	{
	43	void *ptr;
	44	u64 addr;
a3f5bafc	45	ulong flags = choose_memblock_flags();
8bc1f91e YL	46
	47	if (limit > memblock.current_limit)
	48	limit = memblock.current_limit;
	49
a3f5bafc	50	again:
fc6daaf9	51	addr = memblock_find_in_range_node(size, align, goal, limit, nid,
a3f5bafc TL	52	flags);
	53	if (!addr && (flags & MEMBLOCK_MIRROR)) {
	54	flags &= ~MEMBLOCK_MIRROR;
	55	pr_warn("Could not allocate %pap bytes of mirrored memory\n",
	56	&size);
	57	goto again;
	58	}
1f5026a7	59	if (!addr)
8bc1f91e YL	60	return NULL;
8bc1f91e YL	61
87379ec8 PH	62	if (memblock_reserve(addr, size))
	63	return NULL;
	64
8bc1f91e YL	65	ptr = phys_to_virt(addr);
8bc1f91e YL	66	memset(ptr, 0, size);
8bc1f91e YL	67	/*
	68	* The min_count is set to 0 so that bootmem allocated blocks
	69	* are never reported as leaks.
	70	*/
	71	kmemleak_alloc(ptr, size, 0, 0);
	72	return ptr;
	73	}
	74
09325873 YL	75	/*
	76	* free_bootmem_late - free bootmem pages directly to page allocator
	77	* @addr: starting address of the range
	78	* @size: size of the range in bytes
	79	*
	80	* This is only useful when the bootmem allocator has already been torn
	81	* down, but we are still initializing the system. Pages are given directly
	82	* to the page allocator, no bootmem metadata is updated because it is gone.
	83	*/
	84	void __init free_bootmem_late(unsigned long addr, unsigned long size)
	85	{
	86	unsigned long cursor, end;
	87
9099daed	88	kmemleak_free_part_phys(addr, size);
09325873 YL	89
	90	cursor = PFN_UP(addr);
	91	end = PFN_DOWN(addr + size);
	92
	93	for (; cursor < end; cursor++) {
d70ddd7a	94	__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
09325873 YL	95	totalram_pages++;
	96	}
	97	}
	98
	99	static void __init __free_pages_memory(unsigned long start, unsigned long end)
	100	{
309d0b39	101	int order;
09325873	102
309d0b39 RH	103	while (start < end) {
309d0b39 RH	104	order = min(MAX_ORDER - 1UL, __ffs(start));
09325873	105
309d0b39 RH	106	while (start + (1UL << order) > end)
309d0b39 RH	107	order--;
09325873	108
d70ddd7a	109	__free_pages_bootmem(pfn_to_page(start), start, order);
09325873	110
309d0b39 RH	111	start += (1UL << order);
309d0b39 RH	112	}
09325873 YL	113	}
09325873 YL	114
29f67386 YL	115	static unsigned long __init __free_memory_core(phys_addr_t start,
	116	phys_addr_t end)
	117	{
	118	unsigned long start_pfn = PFN_UP(start);
	119	unsigned long end_pfn = min_t(unsigned long,
	120	PFN_DOWN(end), max_low_pfn);
	121
172ffeb9	122	if (start_pfn >= end_pfn)
29f67386 YL	123	return 0;
	124
	125	__free_pages_memory(start_pfn, end_pfn);
	126
	127	return end_pfn - start_pfn;
	128	}
	129
b4def350	130	static unsigned long __init free_low_memory_core_early(void)
09325873	131	{
09325873	132	unsigned long count = 0;
354f17e1	133	phys_addr_t start, end;
8a9ca34c TH	134	u64 i;
8a9ca34c TH	135
0a313a99 XQ	136	memblock_clear_hotplug(0, -1);
0a313a99 XQ	137
92923ca3 NZ	138	for_each_reserved_mem_region(i, &start, &end)
	139	reserve_bootmem_region(start, end);
	140
914a0516 WG	141	/*
	142	* We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id
	143	* because in some case like Node0 doesn't have RAM installed
	144	* low ram will be on Node1
	145	*/
fc6daaf9 TL	146	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
fc6daaf9 TL	147	NULL)
29f67386 YL	148	count += __free_memory_core(start, end);
29f67386 YL	149
09325873 YL	150	return count;
	151	}
	152
7b4b2a0d JL	153	static int reset_managed_pages_done __initdata;
7b4b2a0d JL	154
f784a3f1	155	void reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d JL	156	{
	157	struct zone *z;
	158
9feedc9d	159	for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d JL	160	z->managed_pages = 0;
	161	}
	162
	163	void __init reset_all_zones_managed_pages(void)
	164	{
	165	struct pglist_data *pgdat;
	166
f784a3f1 TC	167	if (reset_managed_pages_done)
	168	return;
	169
7b4b2a0d JL	170	for_each_online_pgdat(pgdat)
7b4b2a0d JL	171	reset_node_managed_pages(pgdat);
f784a3f1	172
7b4b2a0d	173	reset_managed_pages_done = 1;
9feedc9d JL	174	}
9feedc9d JL	175
09325873 YL	176	/**
	177	* free_all_bootmem - release free pages to the buddy allocator
	178	*
	179	* Returns the number of pages actually released.
	180	*/
	181	unsigned long __init free_all_bootmem(void)
	182	{
0c988534 JL	183	unsigned long pages;
0c988534 JL	184
7b4b2a0d	185	reset_all_zones_managed_pages();
9feedc9d	186
0c988534 JL	187	pages = free_low_memory_core_early();
	188	totalram_pages += pages;
	189
	190	return pages;
09325873 YL	191	}
	192
	193	/**
	194	* free_bootmem_node - mark a page range as usable
	195	* @pgdat: node the range resides on
	196	* @physaddr: starting address of the range
	197	* @size: size of the range in bytes
	198	*
	199	* Partial pages will be considered reserved and left as they are.
	200	*
	201	* The range must reside completely on the specified node.
	202	*/
	203	void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
	204	unsigned long size)
	205	{
24aa0788	206	memblock_free(physaddr, size);
09325873 YL	207	}
	208
	209	/**
	210	* free_bootmem - mark a page range as usable
	211	* @addr: 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 be contiguous but may span node boundaries.
	217	*/
	218	void __init free_bootmem(unsigned long addr, unsigned long size)
	219	{
24aa0788	220	memblock_free(addr, size);
09325873 YL	221	}
	222
	223	static void * __init ___alloc_bootmem_nopanic(unsigned long size,
	224	unsigned long align,
	225	unsigned long goal,
	226	unsigned long limit)
	227	{
	228	void *ptr;
	229
	230	if (WARN_ON_ONCE(slab_is_available()))
	231	return kzalloc(size, GFP_NOWAIT);
	232
	233	restart:
	234
b1154233	235	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
09325873 YL	236
	237	if (ptr)
	238	return ptr;
	239
	240	if (goal != 0) {
	241	goal = 0;
	242	goto restart;
	243	}
	244
	245	return NULL;
	246	}
	247
	248	/**
	249	* __alloc_bootmem_nopanic - allocate boot memory without panicking
	250	* @size: size of the request in bytes
	251	* @align: alignment of the region
	252	* @goal: preferred starting address of the region
	253	*
	254	* The goal is dropped if it can not be satisfied and the allocation will
	255	* fall back to memory below @goal.
	256	*
	257	* Allocation may happen on any node in the system.
	258	*
	259	* Returns NULL on failure.
	260	*/
	261	void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
	262	unsigned long goal)
	263	{
	264	unsigned long limit = -1UL;
	265
	266	return ___alloc_bootmem_nopanic(size, align, goal, limit);
	267	}
	268
	269	static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
	270	unsigned long goal, unsigned long limit)
	271	{
	272	void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
	273
	274	if (mem)
	275	return mem;
	276	/*
	277	* Whoops, we cannot satisfy the allocation request.
	278	*/
1170532b	279	pr_alert("bootmem alloc of %lu bytes failed!\n", size);
09325873 YL	280	panic("Out of memory");
	281	return NULL;
	282	}
	283
	284	/**
	285	* __alloc_bootmem - allocate boot memory
	286	* @size: size of the request in bytes
	287	* @align: alignment of the region
	288	* @goal: preferred starting address of the region
	289	*
	290	* The goal is dropped if it can not be satisfied and the allocation will
	291	* fall back to memory below @goal.
	292	*
	293	* Allocation may happen on any node in the system.
	294	*
	295	* The function panics if the request can not be satisfied.
	296	*/
	297	void * __init __alloc_bootmem(unsigned long size, unsigned long align,
	298	unsigned long goal)
	299	{
	300	unsigned long limit = -1UL;
	301
	302	return ___alloc_bootmem(size, align, goal, limit);
	303	}
	304
99ab7b19	305	void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
ba539868 JW	306	unsigned long size,
	307	unsigned long align,
	308	unsigned long goal,
	309	unsigned long limit)
	310	{
	311	void *ptr;
	312
	313	again:
	314	ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
	315	goal, limit);
	316	if (ptr)
	317	return ptr;
	318
b1154233	319	ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
ba539868 JW	320	goal, limit);
	321	if (ptr)
	322	return ptr;
	323
	324	if (goal) {
	325	goal = 0;
	326	goto again;
	327	}
	328
	329	return NULL;
	330	}
	331
	332	void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
	333	unsigned long align, unsigned long goal)
	334	{
	335	if (WARN_ON_ONCE(slab_is_available()))
	336	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	337
	338	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
	339	}
	340
de498507	341	static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
ba539868 JW	342	unsigned long align, unsigned long goal,
	343	unsigned long limit)
	344	{
	345	void *ptr;
	346
	347	ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
	348	if (ptr)
	349	return ptr;
	350
1170532b	351	pr_alert("bootmem alloc of %lu bytes failed!\n", size);
ba539868 JW	352	panic("Out of memory");
	353	return NULL;
	354	}
	355
09325873 YL	356	/**
	357	* __alloc_bootmem_node - allocate boot memory from a specific node
	358	* @pgdat: node to allocate from
	359	* @size: size of the request in bytes
	360	* @align: alignment of the region
	361	* @goal: preferred starting address of the region
	362	*
	363	* The goal is dropped if it can not be satisfied and the allocation will
	364	* fall back to memory below @goal.
	365	*
	366	* Allocation may fall back to any node in the system if the specified node
	367	* can not hold the requested memory.
	368	*
	369	* The function panics if the request can not be satisfied.
	370	*/
	371	void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
	372	unsigned long align, unsigned long goal)
	373	{
09325873 YL	374	if (WARN_ON_ONCE(slab_is_available()))
	375	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	376
ba539868	377	return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
09325873 YL	378	}
	379
	380	void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
	381	unsigned long align, unsigned long goal)
	382	{
09325873	383	return __alloc_bootmem_node(pgdat, size, align, goal);
09325873 YL	384	}
09325873 YL	385
09325873 YL	386
	387	/**
	388	* __alloc_bootmem_low - allocate low boot memory
	389	* @size: size of the request in bytes
	390	* @align: alignment of the region
	391	* @goal: preferred starting address of the region
	392	*
	393	* The goal is dropped if it can not be satisfied and the allocation will
	394	* fall back to memory below @goal.
	395	*
	396	* Allocation may happen on any node in the system.
	397	*
	398	* The function panics if the request can not be satisfied.
	399	*/
	400	void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
	401	unsigned long goal)
	402	{
	403	return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
	404	}
	405
38fa4175 YL	406	void * __init __alloc_bootmem_low_nopanic(unsigned long size,
	407	unsigned long align,
	408	unsigned long goal)
	409	{
	410	return ___alloc_bootmem_nopanic(size, align, goal,
	411	ARCH_LOW_ADDRESS_LIMIT);
	412	}
	413
09325873 YL	414	/**
	415	* __alloc_bootmem_low_node - allocate low boot memory from a specific node
	416	* @pgdat: node to allocate from
	417	* @size: size of the request in bytes
	418	* @align: alignment of the region
	419	* @goal: preferred starting address of the region
	420	*
	421	* The goal is dropped if it can not be satisfied and the allocation will
	422	* fall back to memory below @goal.
	423	*
	424	* Allocation may fall back to any node in the system if the specified node
	425	* can not hold the requested memory.
	426	*
	427	* The function panics if the request can not be satisfied.
	428	*/
	429	void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
	430	unsigned long align, unsigned long goal)
	431	{
09325873 YL	432	if (WARN_ON_ONCE(slab_is_available()))
	433	return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
	434
ba539868 JW	435	return ___alloc_bootmem_node(pgdat, size, align, goal,
ba539868 JW	436	ARCH_LOW_ADDRESS_LIMIT);
09325873	437	}