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From:   Mike Rapoport <rppt@linux.vnet.ibm.com>
To:     linux-mm@kvack.org
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        "David S. Miller" <davem@davemloft.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@redhat.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Michal Hocko <mhocko@suse.com>,
        Paul Burton <paul.burton@mips.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Tony Luck <tony.luck@intel.com>, linux-ia64@vger.kernel.org,
        linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org,
        sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
        Mike Rapoport <rppt@linux.vnet.ibm.com>
Subject: [RFC PATCH 04/29] mm: remove bootmem allocator implementation.
Date:   Wed,  5 Sep 2018 18:59:19 +0300
In-Reply-To: <1536163184-26356-1-git-send-email-rppt@linux.vnet.ibm.com>
References: <1536163184-26356-1-git-send-email-rppt@linux.vnet.ibm.com>
Message-Id: <1536163184-26356-5-git-send-email-rppt@linux.vnet.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

All architectures have been converted to use MEMBLOCK + NO_BOOTMEM. The
bootmem allocator implementation can be removed.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
---
 include/linux/bootmem.h |  16 -
 mm/bootmem.c            | 811 ------------------------------------------------
 2 files changed, 827 deletions(-)
 delete mode 100644 mm/bootmem.c

diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index ee61ac3..fce6278 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -26,14 +26,6 @@ extern unsigned long max_pfn;
  */
 extern unsigned long long max_possible_pfn;
 
-extern unsigned long bootmem_bootmap_pages(unsigned long);
-
-extern unsigned long init_bootmem_node(pg_data_t *pgdat,
-				       unsigned long freepfn,
-				       unsigned long startpfn,
-				       unsigned long endpfn);
-extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
-
 extern unsigned long free_all_bootmem(void);
 extern void reset_node_managed_pages(pg_data_t *pgdat);
 extern void reset_all_zones_managed_pages(void);
@@ -55,14 +47,6 @@ extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
 #define BOOTMEM_DEFAULT		0
 #define BOOTMEM_EXCLUSIVE	(1<<0)
 
-extern int reserve_bootmem(unsigned long addr,
-			   unsigned long size,
-			   int flags);
-extern int reserve_bootmem_node(pg_data_t *pgdat,
-				unsigned long physaddr,
-				unsigned long size,
-				int flags);
-
 extern void *__alloc_bootmem(unsigned long size,
 			     unsigned long align,
 			     unsigned long goal);
diff --git a/mm/bootmem.c b/mm/bootmem.c
deleted file mode 100644
index 97db0e8..0000000
--- a/mm/bootmem.c
+++ /dev/null
@@ -1,811 +0,0 @@
-// 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/bug.h>
-#include <linux/io.h>
-#include <linux/bootmem.h>
-
-#include "internal.h"
-
-/**
- * DOC: bootmem overview
- *
- * Bootmem is a boot-time physical memory allocator and configurator.
- *
- * It is used early in the boot process before the page allocator is
- * set up.
- *
- * Bootmem is based on the most basic of allocators, a First Fit
- * allocator which uses a bitmap to represent memory. If a bit is 1,
- * the page is allocated and 0 if unallocated. To satisfy allocations
- * of sizes smaller than a page, the allocator records the Page Frame
- * Number (PFN) of the last allocation and the offset the allocation
- * ended at. Subsequent small allocations are merged together and
- * stored on the same page.
- *
- * The information used by the bootmem allocator is represented by
- * :c:type:`struct bootmem_data`. An array to hold up to %MAX_NUMNODES
- * such structures is statically allocated and then it is discarded
- * when the system initialization completes. Each entry in this array
- * corresponds to a node with memory. For UMA systems only entry 0 is
- * used.
- *
- * The bootmem allocator is initialized during early architecture
- * specific setup. Each architecture is required to supply a
- * :c:func:`setup_arch` function which, among other tasks, is
- * responsible for acquiring the necessary parameters to initialise
- * the boot memory allocator. These parameters define limits of usable
- * physical memory:
- *
- * * @min_low_pfn - the lowest PFN that is available in the system
- * * @max_low_pfn - the highest PFN that may be addressed by low
- *   memory (%ZONE_NORMAL)
- * * @max_pfn - the last PFN available to the system.
- *
- * After those limits are determined, the :c:func:`init_bootmem` or
- * :c:func:`init_bootmem_node` function should be called to initialize
- * the bootmem allocator. The UMA case should use the `init_bootmem`
- * function. It will initialize ``contig_page_data`` structure that
- * represents the only memory node in the system. In the NUMA case the
- * `init_bootmem_node` function should be called to initialize the
- * bootmem allocator for each node.
- *
- * Once the allocator is set up, it is possible to use either single
- * node or NUMA variant of the allocation APIs.
- */
-
-#ifndef CONFIG_NEED_MULTIPLE_NODES
-struct pglist_data __refdata contig_page_data = {
-	.bdata = &bootmem_node_data[0]
-};
-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;
-
-bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
-
-static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);
-
-static int bootmem_debug;
-
-static int __init bootmem_debug_setup(char *buf)
-{
-	bootmem_debug = 1;
-	return 0;
-}
-early_param("bootmem_debug", bootmem_debug_setup);
-
-#define bdebug(fmt, args...) ({				\
-	if (unlikely(bootmem_debug))			\
-		pr_info("bootmem::%s " fmt,		\
-			__func__, ## args);		\
-})
-
-static unsigned long __init bootmap_bytes(unsigned long pages)
-{
-	unsigned long bytes = DIV_ROUND_UP(pages, BITS_PER_BYTE);
-
-	return ALIGN(bytes, sizeof(long));
-}
-
-/**
- * bootmem_bootmap_pages - calculate bitmap size in pages
- * @pages: number of pages the bitmap has to represent
- *
- * Return: the number of pages needed to hold the bitmap.
- */
-unsigned long __init bootmem_bootmap_pages(unsigned long pages)
-{
-	unsigned long bytes = bootmap_bytes(pages);
-
-	return PAGE_ALIGN(bytes) >> PAGE_SHIFT;
-}
-
-/*
- * link bdata in order
- */
-static void __init link_bootmem(bootmem_data_t *bdata)
-{
-	bootmem_data_t *ent;
-
-	list_for_each_entry(ent, &bdata_list, list) {
-		if (bdata->node_min_pfn < ent->node_min_pfn) {
-			list_add_tail(&bdata->list, &ent->list);
-			return;
-		}
-	}
-
-	list_add_tail(&bdata->list, &bdata_list);
-}
-
-/*
- * Called once to set up the allocator itself.
- */
-static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
-	unsigned long mapstart, unsigned long start, unsigned long end)
-{
-	unsigned long mapsize;
-
-	mminit_validate_memmodel_limits(&start, &end);
-	bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
-	bdata->node_min_pfn = start;
-	bdata->node_low_pfn = end;
-	link_bootmem(bdata);
-
-	/*
-	 * Initially all pages are reserved - setup_arch() has to
-	 * register free RAM areas explicitly.
-	 */
-	mapsize = bootmap_bytes(end - start);
-	memset(bdata->node_bootmem_map, 0xff, mapsize);
-
-	bdebug("nid=%td start=%lx map=%lx end=%lx mapsize=%lx\n",
-		bdata - bootmem_node_data, start, mapstart, end, mapsize);
-
-	return mapsize;
-}
-
-/**
- * init_bootmem_node - register a node as boot memory
- * @pgdat: node to register
- * @freepfn: pfn where the bitmap for this node is to be placed
- * @startpfn: first pfn on the node
- * @endpfn: first pfn after the node
- *
- * Return: the number of bytes needed to hold the bitmap for this node.
- */
-unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
-				unsigned long startpfn, unsigned long endpfn)
-{
-	return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
-}
-
-/**
- * init_bootmem - register boot memory
- * @start: pfn where the bitmap is to be placed
- * @pages: number of available physical pages
- *
- * Return: the number of bytes needed to hold the bitmap.
- */
-unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
-{
-	max_low_pfn = pages;
-	min_low_pfn = start;
-	return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
-}
-
-void __init free_bootmem_late(unsigned long physaddr, unsigned long size)
-{
-	unsigned long cursor, end;
-
-	kmemleak_free_part_phys(physaddr, size);
-
-	cursor = PFN_UP(physaddr);
-	end = PFN_DOWN(physaddr + size);
-
-	for (; cursor < end; cursor++) {
-		__free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
-		totalram_pages++;
-	}
-}
-
-static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
-{
-	struct page *page;
-	unsigned long *map, start, end, pages, cur, count = 0;
-
-	if (!bdata->node_bootmem_map)
-		return 0;
-
-	map = bdata->node_bootmem_map;
-	start = bdata->node_min_pfn;
-	end = bdata->node_low_pfn;
-
-	bdebug("nid=%td start=%lx end=%lx\n",
-		bdata - bootmem_node_data, start, end);
-
-	while (start < end) {
-		unsigned long idx, vec;
-		unsigned shift;
-
-		idx = start - bdata->node_min_pfn;
-		shift = idx & (BITS_PER_LONG - 1);
-		/*
-		 * vec holds at most BITS_PER_LONG map bits,
-		 * bit 0 corresponds to start.
-		 */
-		vec = ~map[idx / BITS_PER_LONG];
-
-		if (shift) {
-			vec >>= shift;
-			if (end - start >= BITS_PER_LONG)
-				vec |= ~map[idx / BITS_PER_LONG + 1] <<
-					(BITS_PER_LONG - shift);
-		}
-		/*
-		 * If we have a properly aligned and fully unreserved
-		 * BITS_PER_LONG block of pages in front of us, free
-		 * it in one go.
-		 */
-		if (IS_ALIGNED(start, BITS_PER_LONG) && vec == ~0UL) {
-			int order = ilog2(BITS_PER_LONG);
-
-			__free_pages_bootmem(pfn_to_page(start), start, order);
-			count += BITS_PER_LONG;
-			start += BITS_PER_LONG;
-		} else {
-			cur = start;
-
-			start = ALIGN(start + 1, BITS_PER_LONG);
-			while (vec && cur != start) {
-				if (vec & 1) {
-					page = pfn_to_page(cur);
-					__free_pages_bootmem(page, cur, 0);
-					count++;
-				}
-				vec >>= 1;
-				++cur;
-			}
-		}
-	}
-
-	cur = bdata->node_min_pfn;
-	page = virt_to_page(bdata->node_bootmem_map);
-	pages = bdata->node_low_pfn - bdata->node_min_pfn;
-	pages = bootmem_bootmap_pages(pages);
-	count += pages;
-	while (pages--)
-		__free_pages_bootmem(page++, cur++, 0);
-	bdata->node_bootmem_map = NULL;
-
-	bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count);
-
-	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;
-}
-
-unsigned long __init free_all_bootmem(void)
-{
-	unsigned long total_pages = 0;
-	bootmem_data_t *bdata;
-
-	reset_all_zones_managed_pages();
-
-	list_for_each_entry(bdata, &bdata_list, list)
-		total_pages += free_all_bootmem_core(bdata);
-
-	totalram_pages += total_pages;
-
-	return total_pages;
-}
-
-static void __init __free(bootmem_data_t *bdata,
-			unsigned long sidx, unsigned long eidx)
-{
-	unsigned long idx;
-
-	bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
-		sidx + bdata->node_min_pfn,
-		eidx + bdata->node_min_pfn);
-
-	if (WARN_ON(bdata->node_bootmem_map == NULL))
-		return;
-
-	if (bdata->hint_idx > sidx)
-		bdata->hint_idx = sidx;
-
-	for (idx = sidx; idx < eidx; idx++)
-		if (!test_and_clear_bit(idx, bdata->node_bootmem_map))
-			BUG();
-}
-
-static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx,
-			unsigned long eidx, int flags)
-{
-	unsigned long idx;
-	int exclusive = flags & BOOTMEM_EXCLUSIVE;
-
-	bdebug("nid=%td start=%lx end=%lx flags=%x\n",
-		bdata - bootmem_node_data,
-		sidx + bdata->node_min_pfn,
-		eidx + bdata->node_min_pfn,
-		flags);
-
-	if (WARN_ON(bdata->node_bootmem_map == NULL))
-		return 0;
-
-	for (idx = sidx; idx < eidx; idx++)
-		if (test_and_set_bit(idx, bdata->node_bootmem_map)) {
-			if (exclusive) {
-				__free(bdata, sidx, idx);
-				return -EBUSY;
-			}
-			bdebug("silent double reserve of PFN %lx\n",
-				idx + bdata->node_min_pfn);
-		}
-	return 0;
-}
-
-static int __init mark_bootmem_node(bootmem_data_t *bdata,
-				unsigned long start, unsigned long end,
-				int reserve, int flags)
-{
-	unsigned long sidx, eidx;
-
-	bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n",
-		bdata - bootmem_node_data, start, end, reserve, flags);
-
-	BUG_ON(start < bdata->node_min_pfn);
-	BUG_ON(end > bdata->node_low_pfn);
-
-	sidx = start - bdata->node_min_pfn;
-	eidx = end - bdata->node_min_pfn;
-
-	if (reserve)
-		return __reserve(bdata, sidx, eidx, flags);
-	else
-		__free(bdata, sidx, eidx);
-	return 0;
-}
-
-static int __init mark_bootmem(unsigned long start, unsigned long end,
-				int reserve, int flags)
-{
-	unsigned long pos;
-	bootmem_data_t *bdata;
-
-	pos = start;
-	list_for_each_entry(bdata, &bdata_list, list) {
-		int err;
-		unsigned long max;
-
-		if (pos < bdata->node_min_pfn ||
-		    pos >= bdata->node_low_pfn) {
-			BUG_ON(pos != start);
-			continue;
-		}
-
-		max = min(bdata->node_low_pfn, end);
-
-		err = mark_bootmem_node(bdata, pos, max, reserve, flags);
-		if (reserve && err) {
-			mark_bootmem(start, pos, 0, 0);
-			return err;
-		}
-
-		if (max == end)
-			return 0;
-		pos = bdata->node_low_pfn;
-	}
-	BUG();
-}
-
-void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
-			      unsigned long size)
-{
-	unsigned long start, end;
-
-	kmemleak_free_part_phys(physaddr, size);
-
-	start = PFN_UP(physaddr);
-	end = PFN_DOWN(physaddr + size);
-
-	mark_bootmem_node(pgdat->bdata, start, end, 0, 0);
-}
-
-void __init free_bootmem(unsigned long physaddr, unsigned long size)
-{
-	unsigned long start, end;
-
-	kmemleak_free_part_phys(physaddr, size);
-
-	start = PFN_UP(physaddr);
-	end = PFN_DOWN(physaddr + size);
-
-	mark_bootmem(start, end, 0, 0);
-}
-
-/**
- * reserve_bootmem_node - mark a page range as reserved
- * @pgdat: node the range resides on
- * @physaddr: starting address of the range
- * @size: size of the range in bytes
- * @flags: reservation flags (see linux/bootmem.h)
- *
- * Partial pages will be reserved.
- *
- * The range must reside completely on the specified node.
- *
- * Return: 0 on success, -errno on failure.
- */
-int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
-				 unsigned long size, int flags)
-{
-	unsigned long start, end;
-
-	start = PFN_DOWN(physaddr);
-	end = PFN_UP(physaddr + size);
-
-	return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
-}
-
-/**
- * reserve_bootmem - mark a page range as reserved
- * @addr: starting address of the range
- * @size: size of the range in bytes
- * @flags: reservation flags (see linux/bootmem.h)
- *
- * Partial pages will be reserved.
- *
- * The range must be contiguous but may span node boundaries.
- *
- * Return: 0 on success, -errno on failure.
- */
-int __init reserve_bootmem(unsigned long addr, unsigned long size,
-			    int flags)
-{
-	unsigned long start, end;
-
-	start = PFN_DOWN(addr);
-	end = PFN_UP(addr + size);
-
-	return mark_bootmem(start, end, 1, flags);
-}
-
-static unsigned long __init align_idx(struct bootmem_data *bdata,
-				      unsigned long idx, unsigned long step)
-{
-	unsigned long base = bdata->node_min_pfn;
-
-	/*
-	 * Align the index with respect to the node start so that the
-	 * combination of both satisfies the requested alignment.
-	 */
-
-	return ALIGN(base + idx, step) - base;
-}
-
-static unsigned long __init align_off(struct bootmem_data *bdata,
-				      unsigned long off, unsigned long align)
-{
-	unsigned long base = PFN_PHYS(bdata->node_min_pfn);
-
-	/* Same as align_idx for byte offsets */
-
-	return ALIGN(base + off, align) - base;
-}
-
-static void * __init alloc_bootmem_bdata(struct bootmem_data *bdata,
-					unsigned long size, unsigned long align,
-					unsigned long goal, unsigned long limit)
-{
-	unsigned long fallback = 0;
-	unsigned long min, max, start, sidx, midx, step;
-
-	bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n",
-		bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT,
-		align, goal, limit);
-
-	BUG_ON(!size);
-	BUG_ON(align & (align - 1));
-	BUG_ON(limit && goal + size > limit);
-
-	if (!bdata->node_bootmem_map)
-		return NULL;
-
-	min = bdata->node_min_pfn;
-	max = bdata->node_low_pfn;
-
-	goal >>= PAGE_SHIFT;
-	limit >>= PAGE_SHIFT;
-
-	if (limit && max > limit)
-		max = limit;
-	if (max <= min)
-		return NULL;
-
-	step = max(align >> PAGE_SHIFT, 1UL);
-
-	if (goal && min < goal && goal < max)
-		start = ALIGN(goal, step);
-	else
-		start = ALIGN(min, step);
-
-	sidx = start - bdata->node_min_pfn;
-	midx = max - bdata->node_min_pfn;
-
-	if (bdata->hint_idx > sidx) {
-		/*
-		 * Handle the valid case of sidx being zero and still
-		 * catch the fallback below.
-		 */
-		fallback = sidx + 1;
-		sidx = align_idx(bdata, bdata->hint_idx, step);
-	}
-
-	while (1) {
-		int merge;
-		void *region;
-		unsigned long eidx, i, start_off, end_off;
-find_block:
-		sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx);
-		sidx = align_idx(bdata, sidx, step);
-		eidx = sidx + PFN_UP(size);
-
-		if (sidx >= midx || eidx > midx)
-			break;
-
-		for (i = sidx; i < eidx; i++)
-			if (test_bit(i, bdata->node_bootmem_map)) {
-				sidx = align_idx(bdata, i, step);
-				if (sidx == i)
-					sidx += step;
-				goto find_block;
-			}
-
-		if (bdata->last_end_off & (PAGE_SIZE - 1) &&
-				PFN_DOWN(bdata->last_end_off) + 1 == sidx)
-			start_off = align_off(bdata, bdata->last_end_off, align);
-		else
-			start_off = PFN_PHYS(sidx);
-
-		merge = PFN_DOWN(start_off) < sidx;
-		end_off = start_off + size;
-
-		bdata->last_end_off = end_off;
-		bdata->hint_idx = PFN_UP(end_off);
-
-		/*
-		 * Reserve the area now:
-		 */
-		if (__reserve(bdata, PFN_DOWN(start_off) + merge,
-				PFN_UP(end_off), BOOTMEM_EXCLUSIVE))
-			BUG();
-
-		region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
-				start_off);
-		memset(region, 0, size);
-		/*
-		 * The min_count is set to 0 so that bootmem allocated blocks
-		 * are never reported as leaks.
-		 */
-		kmemleak_alloc(region, size, 0, 0);
-		return region;
-	}
-
-	if (fallback) {
-		sidx = align_idx(bdata, fallback - 1, step);
-		fallback = 0;
-		goto find_block;
-	}
-
-	return NULL;
-}
-
-static void * __init alloc_bootmem_core(unsigned long size,
-					unsigned long align,
-					unsigned long goal,
-					unsigned long limit)
-{
-	bootmem_data_t *bdata;
-	void *region;
-
-	if (WARN_ON_ONCE(slab_is_available()))
-		return kzalloc(size, GFP_NOWAIT);
-
-	list_for_each_entry(bdata, &bdata_list, list) {
-		if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
-			continue;
-		if (limit && bdata->node_min_pfn >= PFN_DOWN(limit))
-			break;
-
-		region = alloc_bootmem_bdata(bdata, size, align, goal, limit);
-		if (region)
-			return region;
-	}
-
-	return NULL;
-}
-
-static void * __init ___alloc_bootmem_nopanic(unsigned long size,
-					      unsigned long align,
-					      unsigned long goal,
-					      unsigned long limit)
-{
-	void *ptr;
-
-restart:
-	ptr = alloc_bootmem_core(size, align, goal, limit);
-	if (ptr)
-		return ptr;
-	if (goal) {
-		goal = 0;
-		goto restart;
-	}
-
-	return NULL;
-}
-
-void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
-					unsigned long goal)
-{
-	unsigned long limit = 0;
-
-	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;
-}
-
-void * __init __alloc_bootmem(unsigned long size, unsigned long align,
-			      unsigned long goal)
-{
-	unsigned long limit = 0;
-
-	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;
-
-	if (WARN_ON_ONCE(slab_is_available()))
-		return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-again:
-
-	/* do not panic in alloc_bootmem_bdata() */
-	if (limit && goal + size > limit)
-		limit = 0;
-
-	ptr = alloc_bootmem_bdata(pgdat->bdata, size, align, goal, limit);
-	if (ptr)
-		return ptr;
-
-	ptr = alloc_bootmem_core(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)
-{
-	return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
-}
-
-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, 0);
-	if (ptr)
-		return ptr;
-
-	pr_alert("bootmem alloc of %lu bytes failed!\n", size);
-	panic("Out of memory");
-	return NULL;
-}
-
-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)
-{
-#ifdef MAX_DMA32_PFN
-	unsigned long end_pfn;
-
-	if (WARN_ON_ONCE(slab_is_available()))
-		return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-
-	/* update goal according ...MAX_DMA32_PFN */
-	end_pfn = pgdat_end_pfn(pgdat);
-
-	if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) &&
-	    (goal >> PAGE_SHIFT) < MAX_DMA32_PFN) {
-		void *ptr;
-		unsigned long new_goal;
-
-		new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
-		ptr = alloc_bootmem_bdata(pgdat->bdata, size, align,
-						 new_goal, 0);
-		if (ptr)
-			return ptr;
-	}
-#endif
-
-	return __alloc_bootmem_node(pgdat, size, align, goal);
-
-}
-
-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);
-}
-
-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);
-}
-- 
2.7.4