ARM: Remove DISCONTIGMEM support

Everything should now be using sparsemem rather than discontigmem, so
remove the code supporting discontigmem from ARM.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -719,7 +719,6 @@ config ARCH_SHARK
 config ARCH_LH7A40X
 	bool "Sharp LH7A40X"
 	select CPU_ARM922T
-	select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 	select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 	select ARCH_USES_GETTIMEOFFSET
 	help
@@ -1241,10 +1240,6 @@ config OABI_COMPAT
 config ARCH_HAS_HOLES_MEMORYMODEL
 	bool
 
-# Discontigmem is deprecated
-config ARCH_DISCONTIGMEM_ENABLE
-	bool
-
 config ARCH_SPARSEMEM_ENABLE
 	bool
 
@@ -1252,13 +1247,7 @@ config ARCH_SPARSEMEM_DEFAULT
 	def_bool ARCH_SPARSEMEM_ENABLE
 
 config ARCH_SELECT_MEMORY_MODEL
-	def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
-
-config NODES_SHIFT
-	int
-	default "4" if ARCH_LH7A40X
-	default "2"
-	depends on NEED_MULTIPLE_NODES
+	def_bool ARCH_SPARSEMEM_ENABLE
 
 config HIGHMEM
 	bool "High Memory Support (EXPERIMENTAL)"

arch/arm/include/asm/memory.h

@@ -234,76 +234,11 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
  *  virt_to_page(k)	convert a _valid_ virtual address to struct page *
  *  virt_addr_valid(k)	indicates whether a virtual address is valid
  */
-#ifndef CONFIG_DISCONTIGMEM
-
 #define ARCH_PFN_OFFSET		PHYS_PFN_OFFSET
 
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define virt_addr_valid(kaddr)	((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
 
-#define PHYS_TO_NID(addr)	(0)
-
-#else /* CONFIG_DISCONTIGMEM */
-
-/*
- * This is more complex.  We have a set of mem_map arrays spread
- * around in memory.
- */
-#include <linux/numa.h>
-
-#define arch_pfn_to_nid(pfn)	PFN_TO_NID(pfn)
-#define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT)
-
-#define virt_to_page(kaddr)					\
-	(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
-
-#define virt_addr_valid(kaddr)	(KVADDR_TO_NID(kaddr) < MAX_NUMNODES)
-
-/*
- * Common discontigmem stuff.
- *  PHYS_TO_NID is used by the ARM kernel/setup.c
- */
-#define PHYS_TO_NID(addr)	PFN_TO_NID((addr) >> PAGE_SHIFT)
-
-/*
- * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
- * and returns the mem_map of that node.
- */
-#define ADDR_TO_MAPBASE(kaddr)	NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
-
-/*
- * Given a page frame number, find the owning node of the memory
- * and returns the mem_map of that node.
- */
-#define PFN_TO_MAPBASE(pfn)	NODE_MEM_MAP(PFN_TO_NID(pfn))
-
-#ifdef NODE_MEM_SIZE_BITS
-#define NODE_MEM_SIZE_MASK	((1 << NODE_MEM_SIZE_BITS) - 1)
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-#define KVADDR_TO_NID(addr) \
-	(((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MEM_SIZE_BITS)
-
-/*
- * Given a page frame number, convert it to a node id.
- */
-#define PFN_TO_NID(pfn) \
-	(((pfn) - PHYS_PFN_OFFSET) >> (NODE_MEM_SIZE_BITS - PAGE_SHIFT))
-
-/*
- * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
- * and returns the index corresponding to the appropriate page in the
- * node's mem_map.
- */
-#define LOCAL_MAP_NR(addr) \
-	(((unsigned long)(addr) & NODE_MEM_SIZE_MASK) >> PAGE_SHIFT)
-
-#endif /* NODE_MEM_SIZE_BITS */
-
-#endif /* !CONFIG_DISCONTIGMEM */
-
 /*
  * Optional coherency support.  Currently used only by selected
  * Intel XSC3-based systems.

arch/arm/include/asm/mmzone.h

-/*
- *  arch/arm/include/asm/mmzone.h
- *
- *  1999-12-29	Nicolas Pitre		Created
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_MMZONE_H
-#define __ASM_MMZONE_H
-
-/*
- * Currently defined in arch/arm/mm/discontig.c
- */
-extern pg_data_t discontig_node_data[];
-
-/*
- * Return a pointer to the node data for node n.
- */
-#define NODE_DATA(nid)		(&discontig_node_data[nid])
-
-/*
- * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
- */
-#define NODE_MEM_MAP(nid)	(NODE_DATA(nid)->node_mem_map)
-
-#include <mach/memory.h>
-
-#endif

arch/arm/include/asm/setup.h

@@ -201,8 +201,7 @@ static struct tagtable __tagtable_##fn __tag = { tag, fn }
 struct membank {
 	unsigned long start;
 	unsigned long size;
-	unsigned short node;
-	unsigned short highmem;
+	unsigned int highmem;
 };
 
 struct meminfo {
@@ -212,9 +211,8 @@ struct meminfo {
 
 extern struct meminfo meminfo;
 
-#define for_each_nodebank(iter,mi,no)			\
-	for (iter = 0; iter < (mi)->nr_banks; iter++)	\
-		if ((mi)->bank[iter].node == no)
+#define for_each_bank(iter,mi)				\
+	for (iter = 0; iter < (mi)->nr_banks; iter++)
 
 #define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
 #define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)

arch/arm/kernel/setup.c

@@ -402,13 +402,12 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
 	size -= start & ~PAGE_MASK;
 	bank->start = PAGE_ALIGN(start);
 	bank->size  = size & PAGE_MASK;
-	bank->node  = PHYS_TO_NID(start);
 
 	/*
 	 * Check whether this memory region has non-zero size or
 	 * invalid node number.
 	 */
-	if (bank->size == 0 || bank->node >= MAX_NUMNODES)
+	if (bank->size == 0)
 		return -EINVAL;
 
 	meminfo.nr_banks++;

arch/arm/mach-aaec2000/include/mach/memory.h

@@ -14,14 +14,4 @@
 
 #define PHYS_OFFSET	UL(0xf0000000)
 
-/*
- * The nodes are the followings:
- *
- *   node 0: 0xf000.0000 - 0xf3ff.ffff
- *   node 1: 0xf400.0000 - 0xf7ff.ffff
- *   node 2: 0xf800.0000 - 0xfbff.ffff
- *   node 3: 0xfc00.0000 - 0xffff.ffff
- */
-#define NODE_MEM_SIZE_BITS	26
-
 #endif /* __ASM_ARCH_MEMORY_H */

arch/arm/mach-clps711x/Kconfig

@@ -30,7 +30,6 @@ config ARCH_CLEP7312
 config ARCH_EDB7211
 	bool "EDB7211"
 	select ISA
-	select ARCH_DISCONTIGMEM_ENABLE
 	select ARCH_SPARSEMEM_ENABLE
 	select ARCH_SELECT_MEMORY_MODEL
 	help

arch/arm/mach-clps711x/clep7312.c

@@ -32,7 +32,6 @@ fixup_clep7312(struct machine_desc *desc, struct tag *tags,
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xc0000000;
 	mi->bank[0].size = 0x01000000;
-	mi->bank[0].node = 0;
 }
 
 

arch/arm/mach-clps711x/edb7211-arch.c

@@ -43,10 +43,8 @@ fixup_edb7211(struct machine_desc *desc, struct tag *tags,
 	 */
 	mi->bank[0].start = 0xc0000000;
 	mi->bank[0].size = 8*1024*1024;
-	mi->bank[0].node = 0;
 	mi->bank[1].start = 0xc1000000;
 	mi->bank[1].size = 8*1024*1024;
-	mi->bank[1].node = 1;
 	mi->nr_banks = 2;
 }
 

arch/arm/mach-clps711x/fortunet.c

@@ -39,7 +39,6 @@ struct meminfo memmap = {
 		{
 			.start	= 0xC0000000,
 			.size	= 0x01000000,
-			.node	= 0
 		},
 	},
 };

arch/arm/mach-clps711x/include/mach/memory.h

@@ -20,7 +20,6 @@
 #ifndef __ASM_ARCH_MEMORY_H
 #define __ASM_ARCH_MEMORY_H
 
-
 /*
  * Physical DRAM offset.
  */
@@ -72,7 +71,6 @@
  * 	node 2:  0xd0000000 - 0xd7ffffff
  * 	node 3:  0xd8000000 - 0xdfffffff
  */
-#define NODE_MEM_SIZE_BITS	24
 #define SECTION_SIZE_BITS	24
 #define MAX_PHYSMEM_BITS	32
 

arch/arm/mach-iop13xx/include/mach/memory.h

@@ -69,6 +69,4 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x)
 #endif /* CONFIG_ARCH_IOP13XX */
 #endif /* !ASSEMBLY */
 
-#define PFN_TO_NID(addr)	(0)
-
 #endif

arch/arm/mach-lh7a40x/include/mach/memory.h

@@ -19,50 +19,6 @@
  */
 #define PHYS_OFFSET	UL(0xc0000000)
 
-#ifdef CONFIG_DISCONTIGMEM
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define KVADDR_TO_NID(addr) \
-  (  ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) &  1)\
-   | ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
-# else  /* 2 banks per node */
-#  define KVADDR_TO_NID(addr) \
-      (((unsigned long) (addr) - PAGE_OFFSET) >> 26)
-# endif
-
-/*
- * Given a page frame number, convert it to a node id.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define PFN_TO_NID(pfn) \
-  (((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) &  1)\
- | ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
-# else  /* 2 banks per node */
-#  define PFN_TO_NID(pfn) \
-    (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
-#endif
-
-/*
- * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
- * and returns the index corresponding to the appropriate page in the
- * node's mem_map.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define LOCAL_MAP_NR(addr) \
-       (((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
-# else  /* 2 banks per node */
-#  define LOCAL_MAP_NR(addr) \
-       (((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
-# endif
-
-#endif
-
 /*
  * Sparsemem version of the above
  */

arch/arm/mach-msm/board-trout.c

@@ -50,7 +50,6 @@ static void __init trout_fixup(struct machine_desc *desc, struct tag *tags,
 {
 	mi->nr_banks = 1;
 	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	mi->bank[0].size = (101*1024*1024);
 }
 

arch/arm/mach-pxa/corgi.c

@@ -715,7 +715,6 @@ static void __init fixup_corgi(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	if (machine_is_corgi())
 		mi->bank[0].size = (32*1024*1024);
 	else

arch/arm/mach-pxa/eseries.c

@@ -34,7 +34,6 @@ void __init eseries_fixup(struct machine_desc *desc,
 {
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	if (machine_is_e800())
 		mi->bank[0].size = (128*1024*1024);
 	else

arch/arm/mach-pxa/generic.h

@@ -26,8 +26,7 @@ extern unsigned int get_clk_frequency_khz(int info);
 
 #define SET_BANK(__nr,__start,__size) \
 	mi->bank[__nr].start = (__start), \
-	mi->bank[__nr].size = (__size), \
-	mi->bank[__nr].node = (((unsigned)(__start) - PHYS_OFFSET) >> 27)
+	mi->bank[__nr].size = (__size)
 
 #define ARRAY_AND_SIZE(x)	(x), ARRAY_SIZE(x)
 

arch/arm/mach-pxa/include/mach/memory.h

@@ -17,18 +17,6 @@
  */
 #define PHYS_OFFSET	UL(0xa0000000)
 
-/*
- * The nodes are matched with the physical SDRAM banks as follows:
- *
- * 	node 0:  0xa0000000-0xa3ffffff	-->  0xc0000000-0xc3ffffff
- * 	node 1:  0xa4000000-0xa7ffffff	-->  0xc4000000-0xc7ffffff
- * 	node 2:  0xa8000000-0xabffffff	-->  0xc8000000-0xcbffffff
- * 	node 3:  0xac000000-0xafffffff	-->  0xcc000000-0xcfffffff
- *
- * This needs a node mem size of 26 bits.
- */
-#define NODE_MEM_SIZE_BITS	26
-
 #if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
 void cmx2xx_pci_adjust_zones(int node, unsigned long *size,
 			     unsigned long *holes);

arch/arm/mach-pxa/poodle.c

@@ -463,7 +463,6 @@ static void __init fixup_poodle(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (32*1024*1024);
 }
 

arch/arm/mach-pxa/spitz.c

@@ -847,7 +847,6 @@ static void __init fixup_spitz(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks = 1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (64*1024*1024);
 }
 

arch/arm/mach-pxa/tosa.c

@@ -948,7 +948,6 @@ static void __init fixup_tosa(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (64*1024*1024);
 }
 

arch/arm/mach-s3c2412/mach-smdk2413.c

@@ -119,7 +119,6 @@ static void __init smdk2413_fixup(struct machine_desc *desc,
 		mi->nr_banks=1;
 		mi->bank[0].start = 0x30000000;
 		mi->bank[0].size = SZ_64M;
-		mi->bank[0].node = 0;
 	}
 }
 

arch/arm/mach-s3c2412/mach-vstms.c

@@ -137,7 +137,6 @@ static void __init vstms_fixup(struct machine_desc *desc,
 		mi->nr_banks=1;
 		mi->bank[0].start = 0x30000000;
 		mi->bank[0].size = SZ_64M;
-		mi->bank[0].node = 0;
 	}
 }
 

arch/arm/mach-sa1100/generic.h

@@ -13,8 +13,7 @@ extern void __init sa1100_init_gpio(void);
 
 #define SET_BANK(__nr,__start,__size) \
 	mi->bank[__nr].start = (__start), \
-	mi->bank[__nr].size = (__size), \
-	mi->bank[__nr].node = (((unsigned)(__start) - PHYS_OFFSET) >> 27)
+	mi->bank[__nr].size = (__size)
 
 extern void (*sa1100fb_backlight_power)(int on);
 extern void (*sa1100fb_lcd_power)(int on);

arch/arm/mm/Makefile

@@ -15,7 +15,6 @@ endif
 obj-$(CONFIG_MODULES)		+= proc-syms.o
 
 obj-$(CONFIG_ALIGNMENT_TRAP)	+= alignment.o
-obj-$(CONFIG_DISCONTIGMEM)	+= discontig.o
 obj-$(CONFIG_HIGHMEM)		+= highmem.o
 
 obj-$(CONFIG_CPU_ABRT_NOMMU)	+= abort-nommu.o

arch/arm/mm/discontig.c

-/*
- * linux/arch/arm/mm/discontig.c
- *
- * Discontiguous memory support.
- *
- * Initial code: Copyright (C) 1999-2000 Nicolas Pitre
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/module.h>
-#include <linux/mmzone.h>
-#include <linux/bootmem.h>
-
-#if MAX_NUMNODES != 4 && MAX_NUMNODES != 16
-# error Fix Me Please
-#endif
-
-/*
- * Our node_data structure for discontiguous memory.
- */
-
-pg_data_t discontig_node_data[MAX_NUMNODES] = {
-  { .bdata = &bootmem_node_data[0] },
-  { .bdata = &bootmem_node_data[1] },
-  { .bdata = &bootmem_node_data[2] },
-  { .bdata = &bootmem_node_data[3] },
-#if MAX_NUMNODES == 16
-  { .bdata = &bootmem_node_data[4] },
-  { .bdata = &bootmem_node_data[5] },
-  { .bdata = &bootmem_node_data[6] },
-  { .bdata = &bootmem_node_data[7] },
-  { .bdata = &bootmem_node_data[8] },
-  { .bdata = &bootmem_node_data[9] },
-  { .bdata = &bootmem_node_data[10] },
-  { .bdata = &bootmem_node_data[11] },
-  { .bdata = &bootmem_node_data[12] },
-  { .bdata = &bootmem_node_data[13] },
-  { .bdata = &bootmem_node_data[14] },
-  { .bdata = &bootmem_node_data[15] },
-#endif
-};
-
-EXPORT_SYMBOL(discontig_node_data);

arch/arm/mm/init.c

@@ -79,38 +79,37 @@ struct meminfo meminfo;
 void show_mem(void)
 {
 	int free = 0, total = 0, reserved = 0;
-	int shared = 0, cached = 0, slab = 0, node, i;
+	int shared = 0, cached = 0, slab = 0, i;
 	struct meminfo * mi = &meminfo;
 
 	printk("Mem-info:\n");
 	show_free_areas();
-	for_each_online_node(node) {
-		for_each_nodebank (i,mi,node) {
-			struct membank *bank = &mi->bank[i];
-			unsigned int pfn1, pfn2;
-			struct page *page, *end;
-
-			pfn1 = bank_pfn_start(bank);
-			pfn2 = bank_pfn_end(bank);
-
-			page = pfn_to_page(pfn1);
-			end  = pfn_to_page(pfn2 - 1) + 1;
-
-			do {
-				total++;
-				if (PageReserved(page))
-					reserved++;
-				else if (PageSwapCache(page))
-					cached++;
-				else if (PageSlab(page))
-					slab++;
-				else if (!page_count(page))
-					free++;
-				else
-					shared += page_count(page) - 1;
-				page++;
-			} while (page < end);
-		}
+
+	for_each_bank (i, mi) {
+		struct membank *bank = &mi->bank[i];
+		unsigned int pfn1, pfn2;
+		struct page *page, *end;
+
+		pfn1 = bank_pfn_start(bank);
+		pfn2 = bank_pfn_end(bank);
+
+		page = pfn_to_page(pfn1);
+		end  = pfn_to_page(pfn2 - 1) + 1;
+
+		do {
+			total++;
+			if (PageReserved(page))
+				reserved++;
+			else if (PageSwapCache(page))
+				cached++;
+			else if (PageSlab(page))
+				slab++;
+			else if (!page_count(page))
+				free++;
+			else
+				shared += page_count(page) - 1;
+			page++;
+		} while (page < end);
 	}
 
 	printk("%d pages of RAM\n", total);
@@ -121,7 +120,7 @@ void show_mem(void)
 	printk("%d pages swap cached\n", cached);
 }
 
-static void __init find_node_limits(int node, struct meminfo *mi,
+static void __init find_limits(struct meminfo *mi,
 	unsigned long *min, unsigned long *max_low, unsigned long *max_high)
 {
 	int i;
@@ -129,7 +128,7 @@ static void __init find_node_limits(int node, struct meminfo *mi,
 	*min = -1UL;
 	*max_low = *max_high = 0;
 
-	for_each_nodebank(i, mi, node) {
+	for_each_bank (i, mi) {
 		struct membank *bank = &mi->bank[i];
 		unsigned long start, end;
 
@@ -154,14 +153,14 @@ static void __init find_node_limits(int node, struct meminfo *mi,
  * the end, we won't clash.
  */
 static unsigned int __init
-find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
+find_bootmap_pfn(struct meminfo *mi, unsigned int bootmap_pages)
 {
 	unsigned int start_pfn, i, bootmap_pfn;
 
 	start_pfn   = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
 	bootmap_pfn = 0;
 
-	for_each_nodebank(i, mi, node) {
+	for_each_bank(i, mi) {
 		struct membank *bank = &mi->bank[i];
 		unsigned int start, end;
 
@@ -191,7 +190,7 @@ find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
 
 static int __init check_initrd(struct meminfo *mi)
 {
-	int initrd_node = -2;
+	int initrd = -2;
 #ifdef CONFIG_BLK_DEV_INITRD
 	unsigned long end = phys_initrd_start + phys_initrd_size;
 
@@ -202,17 +201,17 @@ static int __init check_initrd(struct meminfo *mi)
 	if (phys_initrd_size) {
 		unsigned int i;
 
-		initrd_node = -1;
+		initrd = -1;
 
 		for (i = 0; i < mi->nr_banks; i++) {
 			struct membank *bank = &mi->bank[i];
 			if (bank_phys_start(bank) <= phys_initrd_start &&
 			    end <= bank_phys_end(bank))
-				initrd_node = bank->node;
+				initrd = 0;
 		}
 	}
 
-	if (initrd_node == -1) {
+	if (initrd == -1) {
 		printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond "
 		       "physical memory - disabling initrd\n",
 		       phys_initrd_start, phys_initrd_size);
@@ -220,10 +219,10 @@ static int __init check_initrd(struct meminfo *mi)
 	}
 #endif
 
-	return initrd_node;
+	return initrd;
 }
 
-static void __init bootmem_init_node(int node, struct meminfo *mi,
+static void __init arm_bootmem_init(struct meminfo *mi,
 	unsigned long start_pfn, unsigned long end_pfn)
 {
 	unsigned long boot_pfn;
@@ -235,37 +234,36 @@ static void __init bootmem_init_node(int node, struct meminfo *mi,
 	 * Allocate the bootmem bitmap page.
 	 */
 	boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
-	boot_pfn = find_bootmap_pfn(node, mi, boot_pages);
+	boot_pfn = find_bootmap_pfn(mi, boot_pages);
 
 	/*
-	 * Initialise the bootmem allocator for this node, handing the
+	 * Initialise the bootmem allocator, handing the
 	 * memory banks over to bootmem.
 	 */
-	node_set_online(node);
-	pgdat = NODE_DATA(node);
+	node_set_online(0);
+	pgdat = NODE_DATA(0);
 	init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);
 
-	for_each_nodebank(i, mi, node) {
+	for_each_bank(i, mi) {
 		struct membank *bank = &mi->bank[i];
 		if (!bank->highmem)
-			free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
+			free_bootmem(bank_phys_start(bank), bank_phys_size(bank));
 	}
 
 	/*
-	 * Reserve the bootmem bitmap for this node.
+	 * Reserve the bootmem bitmap.
 	 */
-	reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
-			     boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
+	reserve_bootmem(boot_pfn << PAGE_SHIFT,
+			boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
 }
 
-static void __init bootmem_reserve_initrd(int node)
+static void __init bootmem_reserve_initrd(void)
 {
 #ifdef CONFIG_BLK_DEV_INITRD
-	pg_data_t *pgdat = NODE_DATA(node);
 	int res;
 
-	res = reserve_bootmem_node(pgdat, phys_initrd_start,
-			     phys_initrd_size, BOOTMEM_EXCLUSIVE);
+	res = reserve_bootmem(phys_initrd_start,
+			      phys_initrd_size, BOOTMEM_EXCLUSIVE);
 
 	if (res == 0) {
 		initrd_start = __phys_to_virt(phys_initrd_start);
@@ -279,23 +277,23 @@ static void __init bootmem_reserve_initrd(int node)
 #endif
 }
 
-static void __init bootmem_free_node(int node, struct meminfo *mi)
+static void __init arm_bootmem_free(struct meminfo *mi)
 {
 	unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
 	unsigned long min, max_low, max_high;
 	int i;
 
-	find_node_limits(node, mi, &min, &max_low, &max_high);
+	find_limits(mi, &min, &max_low, &max_high);
 
 	/*
-	 * initialise the zones within this node.
+	 * initialise the zones.
 	 */
 	memset(zone_size, 0, sizeof(zone_size));
 
 	/*
-	 * The size of this node has already been determined.  If we need
-	 * to do anything fancy with the allocation of this memory to the
-	 * zones, now is the time to do it.
+	 * The memory size has already been determined.  If we need
+	 * to do anything fancy with the allocation of this memory
+	 * to the zones, now is the time to do it.
 	 */
 	zone_size[0] = max_low - min;
 #ifdef CONFIG_HIGHMEM
@@ -303,11 +301,11 @@ static void __init bootmem_free_node(int node, struct meminfo *mi)
 #endif
 
 	/*
-	 * For each bank in this node, calculate the size of the holes.
-	 *  holes = node_size - sum(bank_sizes_in_node)
+	 * Calculate the size of the holes.
+	 *  holes = node_size - sum(bank_sizes)
 	 */
 	memcpy(zhole_size, zone_size, sizeof(zhole_size));
-	for_each_nodebank(i, mi, node) {
+	for_each_bank(i, mi) {
 		int idx = 0;
 #ifdef CONFIG_HIGHMEM
 		if (mi->bank[i].highmem)
@@ -320,9 +318,9 @@ static void __init bootmem_free_node(int node, struct meminfo *mi)
 	 * Adjust the sizes according to any special requirements for
 	 * this machine type.
 	 */
-	arch_adjust_zones(node, zone_size, zhole_size);
+	arch_adjust_zones(0, zone_size, zhole_size);
 
-	free_area_init_node(node, zone_size, min, zhole_size);
+	free_area_init_node(0, zone_size, min, zhole_size);
 }
 
 #ifndef CONFIG_SPARSEMEM
@@ -346,16 +344,16 @@ int pfn_valid(unsigned long pfn)
 }
 EXPORT_SYMBOL(pfn_valid);
 
-static void arm_memory_present(struct meminfo *mi, int node)
+static void arm_memory_present(struct meminfo *mi)
 {
 }
 #else
-static void arm_memory_present(struct meminfo *mi, int node)
+static void arm_memory_present(struct meminfo *mi)
 {
 	int i;
-	for_each_nodebank(i, mi, node) {
+	for_each_bank(i, mi) {
 		struct membank *bank = &mi->bank[i];
-		memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
+		memory_present(0, bank_pfn_start(bank), bank_pfn_end(bank));
 	}
 }
 #endif
@@ -364,55 +362,35 @@ void __init bootmem_init(void)
 {
 	struct meminfo *mi = &meminfo;
 	unsigned long min, max_low, max_high;
-	int node, initrd_node;
+	int initrd;
 
 	/*
-	 * Locate which node contains the ramdisk image, if any.
+	 * Locate the ramdisk image, if any.
 	 */
-	initrd_node = check_initrd(mi);
+	initrd = check_initrd(mi);
 
 	max_low = max_high = 0;
 
-	/*
-	 * Run through each node initialising the bootmem allocator.
-	 */
-	for_each_node(node) {
-		unsigned long node_low, node_high;
-
-		find_node_limits(node, mi, &min, &node_low, &node_high);
+	find_limits(mi, &min, &max_low, &max_high);
 
-		if (node_low > max_low)
-			max_low = node_low;
-		if (node_high > max_high)
-			max_high = node_high;
+	arm_bootmem_init(mi, min, max_low);
 
-		/*
-		 * If there is no memory in this node, ignore it.
-		 * (We can't have nodes which have no lowmem)
-		 */
-		if (node_low == 0)
-			continue;
-
-		bootmem_init_node(node, mi, min, node_low);
-
-		/*
-		 * Reserve any special node zero regions.
-		 */
-		if (node == 0)
-			reserve_node_zero(NODE_DATA(node));
+	/*
+	 * Reserve any special regions.
+	 */
+	reserve_special_regions();
 
-		/*
-		 * If the initrd is in this node, reserve its memory.
-		 */
-		if (node == initrd_node)
-			bootmem_reserve_initrd(node);
+	/*
+	 * If the initrd is present, reserve its memory.
+	 */
+	if (initrd == 0)
+		bootmem_reserve_initrd();
 
-		/*
-		 * Sparsemem tries to allocate bootmem in memory_present(),
-		 * so must be done after the fixed reservations
-		 */
-		arm_memory_present(mi, node);
-	}
+	/*
+	 * Sparsemem tries to allocate bootmem in memory_present(),
+	 * so must be done after the fixed reservations
+	 */
+	arm_memory_present(mi);
 
 	/*
 	 * sparse_init() needs the bootmem allocator up and running.
@@ -420,12 +398,11 @@ void __init bootmem_init(void)
 	sparse_init();
 
 	/*
-	 * Now free memory in each node - free_area_init_node needs
+	 * Now free the memory - free_area_init_node needs
 	 * the sparse mem_map arrays initialized by sparse_init()
 	 * for memmap_init_zone(), otherwise all PFNs are invalid.
 	 */
-	for_each_node(node)
-		bootmem_free_node(node, mi);
+	arm_bootmem_free(mi);
 
 	high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
 
@@ -460,7 +437,7 @@ static inline int free_area(unsigned long pfn, unsigned long end, char *s)
 }
 
 static inline void
-free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn)
+free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 {
 	struct page *start_pg, *end_pg;
 	unsigned long pg, pgend;
@@ -483,13 +460,13 @@ free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn)
 	 * free the section of the memmap array.
 	 */
 	if (pg < pgend)
-		free_bootmem_node(NODE_DATA(node), pg, pgend - pg);
+		free_bootmem(pg, pgend - pg);
 }
 
 /*
  * The mem_map array can get very big.  Free the unused area of the memory map.
  */
-static void __init free_unused_memmap_node(int node, struct meminfo *mi)
+static void __init free_unused_memmap(struct meminfo *mi)
 {
 	unsigned long bank_start, prev_bank_end = 0;
 	unsigned int i;
@@ -499,7 +476,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
 	 * may not be the case, especially if the user has provided the
 	 * information on the command line.
 	 */
-	for_each_nodebank(i, mi, node) {
+	for_each_bank(i, mi) {
 		struct membank *bank = &mi->bank[i];
 
 		bank_start = bank_pfn_start(bank);
@@ -514,7 +491,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
 		 * between the current bank and the previous, free it.
 		 */
 		if (prev_bank_end && prev_bank_end != bank_start)
-			free_memmap(node, prev_bank_end, bank_start);
+			free_memmap(prev_bank_end, bank_start);
 
 		prev_bank_end = bank_pfn_end(bank);
 	}
@@ -528,21 +505,14 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
 void __init mem_init(void)
 {
 	unsigned long reserved_pages, free_pages;
-	int i, node;
+	int i;
 
-#ifndef CONFIG_DISCONTIGMEM
 	max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
-#endif
 
 	/* this will put all unused low memory onto the freelists */
-	for_each_online_node(node) {
-		pg_data_t *pgdat = NODE_DATA(node);
-
-		free_unused_memmap_node(node, &meminfo);
+	free_unused_memmap(&meminfo);
 
-		if (pgdat->node_spanned_pages != 0)
-			totalram_pages += free_all_bootmem_node(pgdat);
-	}
+	totalram_pages += free_all_bootmem();
 
 #ifdef CONFIG_SA1111
 	/* now that our DMA memory is actually so designated, we can free it */
@@ -552,39 +522,35 @@ void __init mem_init(void)
 
 #ifdef CONFIG_HIGHMEM
 	/* set highmem page free */
-	for_each_online_node(node) {
-		for_each_nodebank (i, &meminfo, node) {
-			unsigned long start = bank_pfn_start(&meminfo.bank[i]);
-			unsigned long end = bank_pfn_end(&meminfo.bank[i]);
-			if (start >= max_low_pfn + PHYS_PFN_OFFSET)
-				totalhigh_pages += free_area(start, end, NULL);
-		}
+	for_each_bank (i, &meminfo) {
+		unsigned long start = bank_pfn_start(&meminfo.bank[i]);
+		unsigned long end = bank_pfn_end(&meminfo.bank[i]);
+		if (start >= max_low_pfn + PHYS_PFN_OFFSET)
+			totalhigh_pages += free_area(start, end, NULL);
 	}
 	totalram_pages += totalhigh_pages;
 #endif
 
 	reserved_pages = free_pages = 0;
 
-	for_each_online_node(node) {
-		for_each_nodebank(i, &meminfo, node) {
-			struct membank *bank = &meminfo.bank[i];
-			unsigned int pfn1, pfn2;
-			struct page *page, *end;
-
-			pfn1 = bank_pfn_start(bank);
-			pfn2 = bank_pfn_end(bank);
-
-			page = pfn_to_page(pfn1);
-			end  = pfn_to_page(pfn2 - 1) + 1;
-
-			do {
-				if (PageReserved(page))
-					reserved_pages++;
-				else if (!page_count(page))
-					free_pages++;
-				page++;
-			} while (page < end);
-		}
+	for_each_bank(i, &meminfo) {
+		struct membank *bank = &meminfo.bank[i];
+		unsigned int pfn1, pfn2;
+		struct page *page, *end;
+
+		pfn1 = bank_pfn_start(bank);
+		pfn2 = bank_pfn_end(bank);
+
+		page = pfn_to_page(pfn1);
+		end  = pfn_to_page(pfn2 - 1) + 1;
+
+		do {
+			if (PageReserved(page))
+				reserved_pages++;
+			else if (!page_count(page))
+				free_pages++;
+			page++;
+		} while (page < end);
 	}
 
 	/*

arch/arm/mm/mm.h

@@ -28,7 +28,5 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page
 
 #endif
 
-struct pglist_data;
-
 void __init bootmem_init(void);
-void reserve_node_zero(struct pglist_data *pgdat);
+void reserve_special_regions(void);

arch/arm/mm/mmu.c

@@ -827,9 +827,9 @@ static inline void prepare_page_table(void)
 }
 
 /*
- * Reserve the various regions of node 0
+ * Reserve the various regions
  */
-void __init reserve_node_zero(pg_data_t *pgdat)
+void __init reserve_special_regions(void)
 {
 	unsigned long res_size = 0;
 
@@ -838,19 +838,17 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 	 * Note that this can only be in node 0.
 	 */
 #ifdef CONFIG_XIP_KERNEL
-	reserve_bootmem_node(pgdat, __pa(_data), _end - _data,
-			BOOTMEM_DEFAULT);
+	reserve_bootmem(__pa(_data), _end - _data, BOOTMEM_DEFAULT);
 #else
-	reserve_bootmem_node(pgdat, __pa(_stext), _end - _stext,
-			BOOTMEM_DEFAULT);
+	reserve_bootmem(__pa(_stext), _end - _stext, BOOTMEM_DEFAULT);
 #endif
 
 	/*
 	 * Reserve the page tables.  These are already in use,
 	 * and can only be in node 0.
 	 */
-	reserve_bootmem_node(pgdat, __pa(swapper_pg_dir),
-			     PTRS_PER_PGD * sizeof(pgd_t), BOOTMEM_DEFAULT);
+	reserve_bootmem(__pa(swapper_pg_dir),
+			PTRS_PER_PGD * sizeof(pgd_t), BOOTMEM_DEFAULT);
 
 	/*
 	 * Hmm... This should go elsewhere, but we really really need to
@@ -874,29 +872,22 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 
 	if (machine_is_h1940() || machine_is_rx3715()
 		|| machine_is_rx1950()) {
-		reserve_bootmem_node(pgdat, 0x30003000, 0x1000,
-				BOOTMEM_DEFAULT);
-		reserve_bootmem_node(pgdat, 0x30081000, 0x1000,
-				BOOTMEM_DEFAULT);
+		reserve_bootmem(0x30003000, 0x1000, BOOTMEM_DEFAULT);
+		reserve_bootmem(0x30081000, 0x1000, BOOTMEM_DEFAULT);
 	}
 
 	if (machine_is_palmld() || machine_is_palmtx()) {
-		reserve_bootmem_node(pgdat, 0xa0000000, 0x1000,
-				BOOTMEM_EXCLUSIVE);
-		reserve_bootmem_node(pgdat, 0xa0200000, 0x1000,
-				BOOTMEM_EXCLUSIVE);
+		reserve_bootmem(0xa0000000, 0x1000, BOOTMEM_EXCLUSIVE);
+		reserve_bootmem(0xa0200000, 0x1000, BOOTMEM_EXCLUSIVE);
 	}
 
 	if (machine_is_treo680() || machine_is_centro()) {
-		reserve_bootmem_node(pgdat, 0xa0000000, 0x1000,
-				BOOTMEM_EXCLUSIVE);
-		reserve_bootmem_node(pgdat, 0xa2000000, 0x1000,
-				BOOTMEM_EXCLUSIVE);
+		reserve_bootmem(0xa0000000, 0x1000, BOOTMEM_EXCLUSIVE);
+		reserve_bootmem(0xa2000000, 0x1000, BOOTMEM_EXCLUSIVE);
 	}
 
 	if (machine_is_palmt5())
-		reserve_bootmem_node(pgdat, 0xa0200000, 0x1000,
-				BOOTMEM_EXCLUSIVE);
+		reserve_bootmem(0xa0200000, 0x1000, BOOTMEM_EXCLUSIVE);
 
 	/*
 	 * U300 - This platform family can share physical memory
@@ -920,8 +911,7 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 	res_size = __pa(swapper_pg_dir) - PHYS_OFFSET;
 #endif
 	if (res_size)
-		reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size,
-				BOOTMEM_DEFAULT);
+		reserve_bootmem(PHYS_OFFSET, res_size, BOOTMEM_DEFAULT);
 }
 
 /*

arch/arm/mm/nommu.c

@@ -18,20 +18,18 @@
 #include "mm.h"
 
 /*
- * Reserve the various regions of node 0
+ * Reserve the various regions
  */
-void __init reserve_node_zero(pg_data_t *pgdat)
+void __init reserve_special_regions(void)
 {
 	/*
 	 * Register the kernel text and data with bootmem.
 	 * Note that this can only be in node 0.
 	 */
 #ifdef CONFIG_XIP_KERNEL
-	reserve_bootmem_node(pgdat, __pa(_data), _end - _data,
-			BOOTMEM_DEFAULT);
+	reserve_bootmem(__pa(_data), _end - _data, BOOTMEM_DEFAULT);
 #else
-	reserve_bootmem_node(pgdat, __pa(_stext), _end - _stext,
-			BOOTMEM_DEFAULT);
+	reserve_bootmem(__pa(_stext), _end - _stext, BOOTMEM_DEFAULT);
 #endif
 
 	/*
@@ -39,8 +37,7 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 	 * some architectures which the DRAM is the exception vector to trap,
 	 * alloc_page breaks with error, although it is not NULL, but "0."
 	 */
-	reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE,
-			BOOTMEM_DEFAULT);
+	reserve_bootmem(CONFIG_VECTORS_BASE, PAGE_SIZE, BOOTMEM_DEFAULT);
 }
 
 /*