Merge branch 'x86/mm' into x86/core

13 files changed, 472 insertions, 491 deletions

diff --git a/arch/x86/include/asm/init.h b/arch/x86/include/asm/init.h
new file mode 100644
index 000000000000..36fb1a6a5109
--- /dev/null
+++ b/arch/x86/include/asm/init.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_X86_INIT_32_H
+#define _ASM_X86_INIT_32_H
+
+#ifdef CONFIG_X86_32
+extern void __init early_ioremap_page_table_range_init(void);
+#endif
+
+extern unsigned long __init
+kernel_physical_mapping_init(unsigned long start,
+                             unsigned long end,
+                             unsigned long page_size_mask);
+
+
+extern unsigned long __initdata e820_table_start;
+extern unsigned long __meminitdata e820_table_end;
+extern unsigned long __meminitdata e820_table_top;
+
+#endif /* _ASM_X86_INIT_32_H */
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h
index 2d625da6603c..826ad37006ab 100644
--- a/arch/x86/include/asm/page_types.h
+++ b/arch/x86/include/asm/page_types.h
@@ -40,14 +40,8 @@
 
 #ifndef __ASSEMBLY__
 
-struct pgprot;
-
 extern int page_is_ram(unsigned long pagenr);
 extern int devmem_is_allowed(unsigned long pagenr);
-extern void map_devmem(unsigned long pfn, unsigned long size,
-                       struct pgprot vma_prot);
-extern void unmap_devmem(unsigned long pfn, unsigned long size,
-                         struct pgprot vma_prot);
 
 extern unsigned long max_low_pfn_mapped;
 extern unsigned long max_pfn_mapped;
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h
index b0e70056838e..2cd07b9422f4 100644
--- a/arch/x86/include/asm/pat.h
+++ b/arch/x86/include/asm/pat.h
@@ -2,6 +2,7 @@
 #define _ASM_X86_PAT_H
 
 #include <linux/types.h>
+#include <asm/pgtable_types.h>
 
 #ifdef CONFIG_X86_PAT
 extern int pat_enabled;
@@ -17,5 +18,9 @@ extern int free_memtype(u64 start, u64 end);
 
 extern int kernel_map_sync_memtype(u64 base, unsigned long size,
                 unsigned long flag);
+extern void map_devmem(unsigned long pfn, unsigned long size,
+                       struct pgprot vma_prot);
+extern void unmap_devmem(unsigned long pfn, unsigned long size,
+                         struct pgprot vma_prot);
 
 #endif /* _ASM_X86_PAT_H */
diff --git a/arch/x86/include/asm/pgtable_32_types.h b/arch/x86/include/asm/pgtable_32_types.h
index bd8df3b2fe04..2733fad45f98 100644
--- a/arch/x86/include/asm/pgtable_32_types.h
+++ b/arch/x86/include/asm/pgtable_32_types.h
@@ -25,6 +25,11 @@
  * area for the same reason. ;)
  */
 #define VMALLOC_OFFSET  (8 * 1024 * 1024)
+
+#ifndef __ASSEMBLER__
+extern bool __vmalloc_start_set; /* set once high_memory is set */
+#endif
+
 #define VMALLOC_START   ((unsigned long)high_memory + VMALLOC_OFFSET)
 #ifdef CONFIG_X86_PAE
 #define LAST_PKMAP 512
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 4d258ad76a0f..b8238dc8786d 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -273,6 +273,7 @@ typedef struct page *pgtable_t;
 
 extern pteval_t __supported_pte_mask;
 extern int nx_enabled;
+extern void set_nx(void);
 
 #define pgprot_writecombine     pgprot_writecombine
 extern pgprot_t pgprot_writecombine(pgprot_t prot);
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 37cb1bda1baf..e8192401da47 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -558,6 +558,19 @@ static inline void __init construct_default_ISA_mptable(int mpc_default_type)
 
 static struct mpf_intel *mpf_found;
 
+static unsigned long __init get_mpc_size(unsigned long physptr)
+{
+        struct mpc_table *mpc;
+        unsigned long size;
+
+        mpc = early_ioremap(physptr, PAGE_SIZE);
+        size = mpc->length;
+        early_iounmap(mpc, PAGE_SIZE);
+        apic_printk(APIC_VERBOSE, "  mpc: %lx-%lx\n", physptr, physptr + size);
+
+        return size;
+}
+
 /*
  * Scan the memory blocks for an SMP configuration block.
  */
@@ -611,12 +624,16 @@ static void __init __get_smp_config(unsigned int early)
                 construct_default_ISA_mptable(mpf->feature1);
 
         } else if (mpf->physptr) {
+                struct mpc_table *mpc;
+                unsigned long size;
 
+                size = get_mpc_size(mpf->physptr);
+                mpc = early_ioremap(mpf->physptr, size);
                 /*
                  * Read the physical hardware table.  Anything here will
                  * override the defaults.
                  */
-                if (!smp_read_mpc(phys_to_virt(mpf->physptr), early)) {
+                if (!smp_read_mpc(mpc, early)) {
 #ifdef CONFIG_X86_LOCAL_APIC
                         smp_found_config = 0;
 #endif
@@ -624,8 +641,10 @@ static void __init __get_smp_config(unsigned int early)
                                "BIOS bug, MP table errors detected!...\n");
                         printk(KERN_ERR "... disabling SMP support. "
                                "(tell your hw vendor)\n");
+                        early_iounmap(mpc, size);
                         return;
                 }
+                early_iounmap(mpc, size);
 
                 if (early)
                         return;
@@ -697,10 +716,10 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
 
                         if (!reserve)
                                 return 1;
-                        reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
+                        reserve_bootmem_generic(virt_to_phys(mpf), sizeof(*mpf),
                                         BOOTMEM_DEFAULT);
                         if (mpf->physptr) {
-                                unsigned long size = PAGE_SIZE;
+                                unsigned long size = get_mpc_size(mpf->physptr);
 #ifdef CONFIG_X86_32
                                 /*
                                  * We cannot access to MPC table to compute
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index b746deb9ebc6..f28c56e6bf94 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -202,7 +202,9 @@ struct ist_info ist_info;
 #endif
 
 #else
-struct cpuinfo_x86 boot_cpu_data __read_mostly;
+struct cpuinfo_x86 boot_cpu_data __read_mostly = {
+        .x86_phys_bits = MAX_PHYSMEM_BITS,
+};
 EXPORT_SYMBOL(boot_cpu_data);
 #endif
 
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index 00f127c80b0e..d11745334a67 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -158,7 +158,6 @@ EXPORT_SYMBOL(kunmap);
 EXPORT_SYMBOL(kmap_atomic);
 EXPORT_SYMBOL(kunmap_atomic);
 
-#ifdef CONFIG_NUMA
 void __init set_highmem_pages_init(void)
 {
         struct zone *zone;
@@ -182,11 +181,3 @@ void __init set_highmem_pages_init(void)
         }
         totalram_pages += totalhigh_pages;
 }
-#else
-void __init set_highmem_pages_init(void)
-{
-        add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
-
-        totalram_pages += totalhigh_pages;
-}
-#endif /* CONFIG_NUMA */
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index ce6a722587d8..6d63e3d1253d 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -1,8 +1,345 @@
+#include <linux/ioport.h>
 #include <linux/swap.h>
+
 #include <asm/cacheflush.h>
+#include <asm/e820.h>
+#include <asm/init.h>
 #include <asm/page.h>
+#include <asm/page_types.h>
 #include <asm/sections.h>
 #include <asm/system.h>
+#include <asm/tlbflush.h>
+
+unsigned long __initdata e820_table_start;
+unsigned long __meminitdata e820_table_end;
+unsigned long __meminitdata e820_table_top;
+
+int after_bootmem;
+
+int direct_gbpages
+#ifdef CONFIG_DIRECT_GBPAGES
+                                = 1
+#endif
+;
+
+static void __init find_early_table_space(unsigned long end, int use_pse,
+                                          int use_gbpages)
+{
+        unsigned long puds, pmds, ptes, tables, start;
+
+        puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
+        tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
+
+        if (use_gbpages) {
+                unsigned long extra;
+
+                extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
+                pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
+        } else
+                pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
+
+        tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
+
+        if (use_pse) {
+                unsigned long extra;
+
+                extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
+#ifdef CONFIG_X86_32
+                extra += PMD_SIZE;
+#endif
+                ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
+        } else
+                ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+        tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
+
+#ifdef CONFIG_X86_32
+        /* for fixmap */
+        tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
+#endif
+
+        /*
+         * RED-PEN putting page tables only on node 0 could
+         * cause a hotspot and fill up ZONE_DMA. The page tables
+         * need roughly 0.5KB per GB.
+         */
+#ifdef CONFIG_X86_32
+        start = 0x7000;
+        e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
+                                        tables, PAGE_SIZE);
+#else /* CONFIG_X86_64 */
+        start = 0x8000;
+        e820_table_start = find_e820_area(start, end, tables, PAGE_SIZE);
+#endif
+        if (e820_table_start == -1UL)
+                panic("Cannot find space for the kernel page tables");
+
+        e820_table_start >>= PAGE_SHIFT;
+        e820_table_end = e820_table_start;
+        e820_table_top = e820_table_start + (tables >> PAGE_SHIFT);
+
+        printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
+                end, e820_table_start << PAGE_SHIFT, e820_table_top << PAGE_SHIFT);
+}
+
+struct map_range {
+        unsigned long start;
+        unsigned long end;
+        unsigned page_size_mask;
+};
+
+#ifdef CONFIG_X86_32
+#define NR_RANGE_MR 3
+#else /* CONFIG_X86_64 */
+#define NR_RANGE_MR 5
+#endif
+
+static int save_mr(struct map_range *mr, int nr_range,
+                   unsigned long start_pfn, unsigned long end_pfn,
+                   unsigned long page_size_mask)
+{
+        if (start_pfn < end_pfn) {
+                if (nr_range >= NR_RANGE_MR)
+                        panic("run out of range for init_memory_mapping\n");
+                mr[nr_range].start = start_pfn<<PAGE_SHIFT;
+                mr[nr_range].end   = end_pfn<<PAGE_SHIFT;
+                mr[nr_range].page_size_mask = page_size_mask;
+                nr_range++;
+        }
+
+        return nr_range;
+}
+
+#ifdef CONFIG_X86_64
+static void __init init_gbpages(void)
+{
+        if (direct_gbpages && cpu_has_gbpages)
+                printk(KERN_INFO "Using GB pages for direct mapping\n");
+        else
+                direct_gbpages = 0;
+}
+#else
+static inline void init_gbpages(void)
+{
+}
+#endif
+
+/*
+ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ * This runs before bootmem is initialized and gets pages directly from
+ * the physical memory. To access them they are temporarily mapped.
+ */
+unsigned long __init_refok init_memory_mapping(unsigned long start,
+                                               unsigned long end)
+{
+        unsigned long page_size_mask = 0;
+        unsigned long start_pfn, end_pfn;
+        unsigned long pos;
+        unsigned long ret;
+
+        struct map_range mr[NR_RANGE_MR];
+        int nr_range, i;
+        int use_pse, use_gbpages;
+
+        printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
+
+        if (!after_bootmem)
+                init_gbpages();
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+        /*
+         * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
+         * This will simplify cpa(), which otherwise needs to support splitting
+         * large pages into small in interrupt context, etc.
+         */
+        use_pse = use_gbpages = 0;
+#else
+        use_pse = cpu_has_pse;
+        use_gbpages = direct_gbpages;
+#endif
+
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_PAE
+        set_nx();
+        if (nx_enabled)
+                printk(KERN_INFO "NX (Execute Disable) protection: active\n");
+#endif
+
+        /* Enable PSE if available */
+        if (cpu_has_pse)
+                set_in_cr4(X86_CR4_PSE);
+
+        /* Enable PGE if available */
+        if (cpu_has_pge) {
+                set_in_cr4(X86_CR4_PGE);
+                __supported_pte_mask |= _PAGE_GLOBAL;
+        }
+#endif
+
+        if (use_gbpages)
+                page_size_mask |= 1 << PG_LEVEL_1G;
+        if (use_pse)
+                page_size_mask |= 1 << PG_LEVEL_2M;
+
+        memset(mr, 0, sizeof(mr));
+        nr_range = 0;
+
+        /* head if not big page alignment ? */
+        start_pfn = start >> PAGE_SHIFT;
+        pos = start_pfn << PAGE_SHIFT;
+#ifdef CONFIG_X86_32
+        /*
+         * Don't use a large page for the first 2/4MB of memory
+         * because there are often fixed size MTRRs in there
+         * and overlapping MTRRs into large pages can cause
+         * slowdowns.
+         */
+        if (pos == 0)
+                end_pfn = 1<<(PMD_SHIFT - PAGE_SHIFT);
+        else
+                end_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
+                                 << (PMD_SHIFT - PAGE_SHIFT);
+#else /* CONFIG_X86_64 */
+        end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
+                        << (PMD_SHIFT - PAGE_SHIFT);
+#endif
+        if (end_pfn > (end >> PAGE_SHIFT))
+                end_pfn = end >> PAGE_SHIFT;
+        if (start_pfn < end_pfn) {
+                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+                pos = end_pfn << PAGE_SHIFT;
+        }
+
+        /* big page (2M) range */
+        start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
+                         << (PMD_SHIFT - PAGE_SHIFT);
+#ifdef CONFIG_X86_32
+        end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+#else /* CONFIG_X86_64 */
+        end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
+                         << (PUD_SHIFT - PAGE_SHIFT);
+        if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
+                end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
+#endif
+
+        if (start_pfn < end_pfn) {
+                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+                                page_size_mask & (1<<PG_LEVEL_2M));
+                pos = end_pfn << PAGE_SHIFT;
+        }
+
+#ifdef CONFIG_X86_64
+        /* big page (1G) range */
+        start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
+                         << (PUD_SHIFT - PAGE_SHIFT);
+        end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
+        if (start_pfn < end_pfn) {
+                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+                                page_size_mask &
+                                 ((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
+                pos = end_pfn << PAGE_SHIFT;
+        }
+
+        /* tail is not big page (1G) alignment */
+        start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
+                         << (PMD_SHIFT - PAGE_SHIFT);
+        end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+        if (start_pfn < end_pfn) {
+                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+                                page_size_mask & (1<<PG_LEVEL_2M));
+                pos = end_pfn << PAGE_SHIFT;
+        }
+#endif
+
+        /* tail is not big page (2M) alignment */
+        start_pfn = pos>>PAGE_SHIFT;
+        end_pfn = end>>PAGE_SHIFT;
+        nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+
+        /* try to merge same page size and continuous */
+        for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
+                unsigned long old_start;
+                if (mr[i].end != mr[i+1].start ||
+                    mr[i].page_size_mask != mr[i+1].page_size_mask)
+                        continue;
+                /* move it */
+                old_start = mr[i].start;
+                memmove(&mr[i], &mr[i+1],
+                        (nr_range - 1 - i) * sizeof(struct map_range));
+                mr[i--].start = old_start;
+                nr_range--;
+        }
+
+        for (i = 0; i < nr_range; i++)
+                printk(KERN_DEBUG " %010lx - %010lx page %s\n",
+                                mr[i].start, mr[i].end,
+                        (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
+                         (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+
+        /*
+         * Find space for the kernel direct mapping tables.
+         *
+         * Later we should allocate these tables in the local node of the
+         * memory mapped. Unfortunately this is done currently before the
+         * nodes are discovered.
+         */
+        if (!after_bootmem)
+                find_early_table_space(end, use_pse, use_gbpages);
+
+#ifdef CONFIG_X86_32
+        for (i = 0; i < nr_range; i++)
+                kernel_physical_mapping_init(mr[i].start, mr[i].end,
+                                             mr[i].page_size_mask);
+        ret = end;
+#else /* CONFIG_X86_64 */
+        for (i = 0; i < nr_range; i++)
+                ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
+                                                   mr[i].page_size_mask);
+#endif
+
+#ifdef CONFIG_X86_32
+        early_ioremap_page_table_range_init();
+
+        load_cr3(swapper_pg_dir);
+#endif
+
+#ifdef CONFIG_X86_64
+        if (!after_bootmem)
+                mmu_cr4_features = read_cr4();
+#endif
+        __flush_tlb_all();
+
+        if (!after_bootmem && e820_table_end > e820_table_start)
+                reserve_early(e820_table_start << PAGE_SHIFT,
+                                 e820_table_end << PAGE_SHIFT, "PGTABLE");
+
+        if (!after_bootmem)
+                early_memtest(start, end);
+
+        return ret >> PAGE_SHIFT;
+}
+
+
+/*
+ * devmem_is_allowed() checks to see if /dev/mem access to a certain address
+ * is valid. The argument is a physical page number.
+ *
+ *
+ * On x86, access has to be given to the first megabyte of ram because that area
+ * contains bios code and data regions used by X and dosemu and similar apps.
+ * Access has to be given to non-kernel-ram areas as well, these contain the PCI
+ * mmio resources as well as potential bios/acpi data regions.
+ */
+int devmem_is_allowed(unsigned long pagenr)
+{
+        if (pagenr <= 256)
+                return 1;
+        if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
+                return 0;
+        if (!page_is_ram(pagenr))
+                return 1;
+        return 0;
+}
 
 void free_init_pages(char *what, unsigned long begin, unsigned long end)
 {
@@ -47,3 +384,10 @@ void free_initmem(void)
                         (unsigned long)(&__init_begin),
                         (unsigned long)(&__init_end));
 }
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+        free_init_pages("initrd memory", start, end);
+}
+#endif
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 47df0e1bbeb9..2966c6b8d304 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -49,6 +49,7 @@
 #include <asm/paravirt.h>
 #include <asm/setup.h>
 #include <asm/cacheflush.h>
+#include <asm/init.h>
 
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
@@ -58,19 +59,14 @@ unsigned long highstart_pfn, highend_pfn;
 
 static noinline int do_test_wp_bit(void);
 
-
-static unsigned long __initdata table_start;
-static unsigned long __meminitdata table_end;
-static unsigned long __meminitdata table_top;
-
-static int __initdata after_init_bootmem;
+bool __read_mostly __vmalloc_start_set = false;
 
 static __init void *alloc_low_page(void)
 {
-        unsigned long pfn = table_end++;
+        unsigned long pfn = e820_table_end++;
         void *adr;
 
-        if (pfn >= table_top)
+        if (pfn >= e820_table_top)
                 panic("alloc_low_page: ran out of memory");
 
         adr = __va(pfn * PAGE_SIZE);
@@ -90,7 +86,7 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
 
 #ifdef CONFIG_X86_PAE
         if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
-                if (after_init_bootmem)
+                if (after_bootmem)
                         pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
                 else
                         pmd_table = (pmd_t *)alloc_low_page();
@@ -117,7 +113,7 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
         if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
                 pte_t *page_table = NULL;
 
-                if (after_init_bootmem) {
+                if (after_bootmem) {
 #ifdef CONFIG_DEBUG_PAGEALLOC
                         page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
 #endif
@@ -168,12 +164,12 @@ static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
         if (pmd_idx_kmap_begin != pmd_idx_kmap_end
             && (vaddr >> PMD_SHIFT) >= pmd_idx_kmap_begin
             && (vaddr >> PMD_SHIFT) <= pmd_idx_kmap_end
-            && ((__pa(pte) >> PAGE_SHIFT) < table_start
-                || (__pa(pte) >> PAGE_SHIFT) >= table_end)) {
+            && ((__pa(pte) >> PAGE_SHIFT) < e820_table_start
+                || (__pa(pte) >> PAGE_SHIFT) >= e820_table_end)) {
                 pte_t *newpte;
                 int i;
 
-                BUG_ON(after_init_bootmem);
+                BUG_ON(after_bootmem);
                 newpte = alloc_low_page();
                 for (i = 0; i < PTRS_PER_PTE; i++)
                         set_pte(newpte + i, pte[i]);
@@ -242,11 +238,14 @@ static inline int is_kernel_text(unsigned long addr)
  * of max_low_pfn pages, by creating page tables starting from address
  * PAGE_OFFSET:
  */
-static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
-                                                unsigned long start_pfn,
-                                                unsigned long end_pfn,
-                                                int use_pse)
+unsigned long __init
+kernel_physical_mapping_init(unsigned long start,
+                             unsigned long end,
+                             unsigned long page_size_mask)
 {
+        int use_pse = page_size_mask == (1<<PG_LEVEL_2M);
+        unsigned long start_pfn, end_pfn;
+        pgd_t *pgd_base = swapper_pg_dir;
         int pgd_idx, pmd_idx, pte_ofs;
         unsigned long pfn;
         pgd_t *pgd;
@@ -255,6 +254,9 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
         unsigned pages_2m, pages_4k;
         int mapping_iter;
 
+        start_pfn = start >> PAGE_SHIFT;
+        end_pfn = end >> PAGE_SHIFT;
+
         /*
          * First iteration will setup identity mapping using large/small pages
          * based on use_pse, with other attributes same as set by
@@ -369,26 +371,6 @@ repeat:
                 mapping_iter = 2;
                 goto repeat;
         }
-}
-
-/*
- * devmem_is_allowed() checks to see if /dev/mem access to a certain address
- * is valid. The argument is a physical page number.
- *
- *
- * On x86, access has to be given to the first megabyte of ram because that area
- * contains bios code and data regions used by X and dosemu and similar apps.
- * Access has to be given to non-kernel-ram areas as well, these contain the PCI
- * mmio resources as well as potential bios/acpi data regions.
- */
-int devmem_is_allowed(unsigned long pagenr)
-{
-        if (pagenr <= 256)
-                return 1;
-        if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
-                return 0;
-        if (!page_is_ram(pagenr))
-                return 1;
         return 0;
 }
 
@@ -545,8 +527,9 @@ void __init native_pagetable_setup_done(pgd_t *base)
  * be partially populated, and so it avoids stomping on any existing
  * mappings.
  */
-static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
+void __init early_ioremap_page_table_range_init(void)
 {
+        pgd_t *pgd_base = swapper_pg_dir;
         unsigned long vaddr, end;
 
         /*
@@ -641,7 +624,7 @@ static int __init noexec_setup(char *str)
 }
 early_param("noexec", noexec_setup);
 
-static void __init set_nx(void)
+void __init set_nx(void)
 {
         unsigned int v[4], l, h;
 
@@ -793,6 +776,8 @@ void __init initmem_init(unsigned long start_pfn,
 #ifdef CONFIG_FLATMEM
         max_mapnr = num_physpages;
 #endif
+        __vmalloc_start_set = true;
+
         printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
                         pages_to_mb(max_low_pfn));
 
@@ -814,176 +799,61 @@ static void __init zone_sizes_init(void)
         free_area_init_nodes(max_zone_pfns);
 }
 
+static unsigned long __init setup_node_bootmem(int nodeid,
+                                 unsigned long start_pfn,
+                                 unsigned long end_pfn,
+                                 unsigned long bootmap)
+{
+        unsigned long bootmap_size;
+
+        if (start_pfn > max_low_pfn)
+                return bootmap;
+        if (end_pfn > max_low_pfn)
+                end_pfn = max_low_pfn;
+
+        /* don't touch min_low_pfn */
+        bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
+                                         bootmap >> PAGE_SHIFT,
+                                         start_pfn, end_pfn);
+        printk(KERN_INFO "  node %d low ram: %08lx - %08lx\n",
+                nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+        printk(KERN_INFO "  node %d bootmap %08lx - %08lx\n",
+                 nodeid, bootmap, bootmap + bootmap_size);
+        free_bootmem_with_active_regions(nodeid, end_pfn);
+        early_res_to_bootmem(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+
+        return bootmap + bootmap_size;
+}
+
 void __init setup_bootmem_allocator(void)
 {
-        int i;
+        int nodeid;
         unsigned long bootmap_size, bootmap;
         /*
          * Initialize the boot-time allocator (with low memory only):
          */
         bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
-        bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
-                                 max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
+        bootmap = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
                                  PAGE_SIZE);
         if (bootmap == -1L)
                 panic("Cannot find bootmem map of size %ld\n", bootmap_size);
         reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
 
-        /* don't touch min_low_pfn */
-        bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
-                                         min_low_pfn, max_low_pfn);
         printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
                  max_pfn_mapped<<PAGE_SHIFT);
-        printk(KERN_INFO "  low ram: %08lx - %08lx\n",
-                 min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
-        printk(KERN_INFO "  bootmap %08lx - %08lx\n",
-                 bootmap, bootmap + bootmap_size);
-        for_each_online_node(i)
-                free_bootmem_with_active_regions(i, max_low_pfn);
-        early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
-
-        after_init_bootmem = 1;
-}
-
-static void __init find_early_table_space(unsigned long end, int use_pse)
-{
-        unsigned long puds, pmds, ptes, tables, start;
-
-        puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
-        tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
-
-        pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
-        tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
-
-        if (use_pse) {
-                unsigned long extra;
-
-                extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
-                extra += PMD_SIZE;
-                ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        } else
-                ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+        printk(KERN_INFO "  low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
 
-        tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
-
-        /* for fixmap */
-        tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
-
-        /*
-         * RED-PEN putting page tables only on node 0 could
-         * cause a hotspot and fill up ZONE_DMA. The page tables
-         * need roughly 0.5KB per GB.
-         */
-        start = 0x7000;
-        table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
-                                        tables, PAGE_SIZE);
-        if (table_start == -1UL)
-                panic("Cannot find space for the kernel page tables");
-
-        table_start >>= PAGE_SHIFT;
-        table_end = table_start;
-        table_top = table_start + (tables>>PAGE_SHIFT);
-
-        printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
-                end, table_start << PAGE_SHIFT,
-                (table_start << PAGE_SHIFT) + tables);
-}
-
-unsigned long __init_refok init_memory_mapping(unsigned long start,
-                                                unsigned long end)
-{
-        pgd_t *pgd_base = swapper_pg_dir;
-        unsigned long start_pfn, end_pfn;
-        unsigned long big_page_start;
-#ifdef CONFIG_DEBUG_PAGEALLOC
-        /*
-         * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
-         * This will simplify cpa(), which otherwise needs to support splitting
-         * large pages into small in interrupt context, etc.
-         */
-        int use_pse = 0;
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+        for_each_online_node(nodeid)
+                bootmap = setup_node_bootmem(nodeid, node_start_pfn[nodeid],
+                                        node_end_pfn[nodeid], bootmap);
 #else
-        int use_pse = cpu_has_pse;
-#endif
-
-        /*
-         * Find space for the kernel direct mapping tables.
-         */
-        if (!after_init_bootmem)
-                find_early_table_space(end, use_pse);
-
-#ifdef CONFIG_X86_PAE
-        set_nx();
-        if (nx_enabled)
-                printk(KERN_INFO "NX (Execute Disable) protection: active\n");
+        bootmap = setup_node_bootmem(0, 0, max_low_pfn, bootmap);
 #endif
 
-        /* Enable PSE if available */
-        if (cpu_has_pse)
-                set_in_cr4(X86_CR4_PSE);
-
-        /* Enable PGE if available */
-        if (cpu_has_pge) {
-                set_in_cr4(X86_CR4_PGE);
-                __supported_pte_mask |= _PAGE_GLOBAL;
-        }
-
-        /*
-         * Don't use a large page for the first 2/4MB of memory
-         * because there are often fixed size MTRRs in there
-         * and overlapping MTRRs into large pages can cause
-         * slowdowns.
-         */
-        big_page_start = PMD_SIZE;
-
-        if (start < big_page_start) {
-                start_pfn = start >> PAGE_SHIFT;
-                end_pfn = min(big_page_start>>PAGE_SHIFT, end>>PAGE_SHIFT);
-        } else {
-                /* head is not big page alignment ? */
-                start_pfn = start >> PAGE_SHIFT;
-                end_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
-                                 << (PMD_SHIFT - PAGE_SHIFT);
-        }
-        if (start_pfn < end_pfn)
-                kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn, 0);
-
-        /* big page range */
-        start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
-                         << (PMD_SHIFT - PAGE_SHIFT);
-        if (start_pfn < (big_page_start >> PAGE_SHIFT))
-                start_pfn =  big_page_start >> PAGE_SHIFT;
-        end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
-        if (start_pfn < end_pfn)
-                kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn,
-                                             use_pse);
-
-        /* tail is not big page alignment ? */
-        start_pfn = end_pfn;
-        if (start_pfn > (big_page_start>>PAGE_SHIFT)) {
-                end_pfn = end >> PAGE_SHIFT;
-                if (start_pfn < end_pfn)
-                        kernel_physical_mapping_init(pgd_base, start_pfn,
-                                                         end_pfn, 0);
-        }
-
-        early_ioremap_page_table_range_init(pgd_base);
-
-        load_cr3(swapper_pg_dir);
-
-        __flush_tlb_all();
-
-        if (!after_init_bootmem)
-                reserve_early(table_start << PAGE_SHIFT,
-                                 table_end << PAGE_SHIFT, "PGTABLE");
-
-        if (!after_init_bootmem)
-                early_memtest(start, end);
-
-        return end >> PAGE_SHIFT;
+        after_bootmem = 1;
 }
 
-
 /*
  * paging_init() sets up the page tables - note that the first 8MB are
  * already mapped by head.S.
@@ -1217,13 +1087,6 @@ void mark_rodata_ro(void)
 }
 #endif
 
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-        free_init_pages("initrd memory", start, end);
-}
-#endif
-
 int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
                                    int flags)
 {
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 07f44d491df1..8a853bc3b287 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -48,6 +48,7 @@
 #include <asm/kdebug.h>
 #include <asm/numa.h>
 #include <asm/cacheflush.h>
+#include <asm/init.h>
 
 /*
  * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
@@ -61,12 +62,6 @@ static unsigned long dma_reserve __initdata;
 
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
-int direct_gbpages
-#ifdef CONFIG_DIRECT_GBPAGES
-                                = 1
-#endif
-;
-
 static int __init parse_direct_gbpages_off(char *arg)
 {
         direct_gbpages = 0;
@@ -87,8 +82,6 @@ early_param("gbpages", parse_direct_gbpages_on);
  * around without checking the pgd every time.
  */
 
-int after_bootmem;
-
 pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
 EXPORT_SYMBOL_GPL(__supported_pte_mask);
 
@@ -325,13 +318,9 @@ void __init cleanup_highmap(void)
         }
 }
 
-static unsigned long __initdata table_start;
-static unsigned long __meminitdata table_end;
-static unsigned long __meminitdata table_top;
-
 static __ref void *alloc_low_page(unsigned long *phys)
 {
-        unsigned long pfn = table_end++;
+        unsigned long pfn = e820_table_end++;
         void *adr;
 
         if (after_bootmem) {
@@ -341,7 +330,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
                 return adr;
         }
 
-        if (pfn >= table_top)
+        if (pfn >= e820_table_top)
                 panic("alloc_low_page: ran out of memory");
 
         adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
@@ -581,58 +570,10 @@ phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end,
         return phys_pud_init(pud, addr, end, page_size_mask);
 }
 
-static void __init find_early_table_space(unsigned long end, int use_pse,
-                                          int use_gbpages)
-{
-        unsigned long puds, pmds, ptes, tables, start;
-
-        puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
-        tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
-        if (use_gbpages) {
-                unsigned long extra;
-                extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
-                pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
-        } else
-                pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
-        tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
-
-        if (use_pse) {
-                unsigned long extra;
-                extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
-                ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        } else
-                ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
-
-        /*
-         * RED-PEN putting page tables only on node 0 could
-         * cause a hotspot and fill up ZONE_DMA. The page tables
-         * need roughly 0.5KB per GB.
-         */
-        start = 0x8000;
-        table_start = find_e820_area(start, end, tables, PAGE_SIZE);
-        if (table_start == -1UL)
-                panic("Cannot find space for the kernel page tables");
-
-        table_start >>= PAGE_SHIFT;
-        table_end = table_start;
-        table_top = table_start + (tables >> PAGE_SHIFT);
-
-        printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
-                end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT);
-}
-
-static void __init init_gbpages(void)
-{
-        if (direct_gbpages && cpu_has_gbpages)
-                printk(KERN_INFO "Using GB pages for direct mapping\n");
-        else
-                direct_gbpages = 0;
-}
-
-static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
-                                                unsigned long end,
-                                                unsigned long page_size_mask)
+unsigned long __init
+kernel_physical_mapping_init(unsigned long start,
+                             unsigned long end,
+                             unsigned long page_size_mask)
 {
 
         unsigned long next, last_map_addr = end;
@@ -669,176 +610,6 @@ static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
         return last_map_addr;
 }
 
-struct map_range {
-        unsigned long start;
-        unsigned long end;
-        unsigned page_size_mask;
-};
-
-#define NR_RANGE_MR 5
-
-static int save_mr(struct map_range *mr, int nr_range,
-                   unsigned long start_pfn, unsigned long end_pfn,
-                   unsigned long page_size_mask)
-{
-
-        if (start_pfn < end_pfn) {
-                if (nr_range >= NR_RANGE_MR)
-                        panic("run out of range for init_memory_mapping\n");
-                mr[nr_range].start = start_pfn<<PAGE_SHIFT;
-                mr[nr_range].end   = end_pfn<<PAGE_SHIFT;
-                mr[nr_range].page_size_mask = page_size_mask;
-                nr_range++;
-        }
-
-        return nr_range;
-}
-
-/*
- * Setup the direct mapping of the physical memory at PAGE_OFFSET.
- * This runs before bootmem is initialized and gets pages directly from
- * the physical memory. To access them they are temporarily mapped.
- */
-unsigned long __init_refok init_memory_mapping(unsigned long start,
-                                               unsigned long end)
-{
-        unsigned long last_map_addr = 0;
-        unsigned long page_size_mask = 0;
-        unsigned long start_pfn, end_pfn;
-        unsigned long pos;
-
-        struct map_range mr[NR_RANGE_MR];
-        int nr_range, i;
-        int use_pse, use_gbpages;
-
-        printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
-
-        /*
-         * Find space for the kernel direct mapping tables.
-         *
-         * Later we should allocate these tables in the local node of the
-         * memory mapped. Unfortunately this is done currently before the
-         * nodes are discovered.
-         */
-        if (!after_bootmem)
-                init_gbpages();
-
-#ifdef CONFIG_DEBUG_PAGEALLOC
-        /*
-         * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
-         * This will simplify cpa(), which otherwise needs to support splitting
-         * large pages into small in interrupt context, etc.
-         */
-        use_pse = use_gbpages = 0;
-#else
-        use_pse = cpu_has_pse;
-        use_gbpages = direct_gbpages;
-#endif
-
-        if (use_gbpages)
-                page_size_mask |= 1 << PG_LEVEL_1G;
-        if (use_pse)
-                page_size_mask |= 1 << PG_LEVEL_2M;
-
-        memset(mr, 0, sizeof(mr));
-        nr_range = 0;
-
-        /* head if not big page alignment ?*/
-        start_pfn = start >> PAGE_SHIFT;
-        pos = start_pfn << PAGE_SHIFT;
-        end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
-                        << (PMD_SHIFT - PAGE_SHIFT);
-        if (end_pfn > (end >> PAGE_SHIFT))
-                end_pfn = end >> PAGE_SHIFT;
-        if (start_pfn < end_pfn) {
-                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
-                pos = end_pfn << PAGE_SHIFT;
-        }
-
-        /* big page (2M) range*/
-        start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
-                         << (PMD_SHIFT - PAGE_SHIFT);
-        end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
-                         << (PUD_SHIFT - PAGE_SHIFT);
-        if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
-                end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
-        if (start_pfn < end_pfn) {
-                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
-                                page_size_mask & (1<<PG_LEVEL_2M));
-                pos = end_pfn << PAGE_SHIFT;
-        }
-
-        /* big page (1G) range */
-        start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
-                         << (PUD_SHIFT - PAGE_SHIFT);
-        end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
-        if (start_pfn < end_pfn) {
-                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
-                                page_size_mask &
-                                 ((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
-                pos = end_pfn << PAGE_SHIFT;
-        }
-
-        /* tail is not big page (1G) alignment */
-        start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
-                         << (PMD_SHIFT - PAGE_SHIFT);
-        end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
-        if (start_pfn < end_pfn) {
-                nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
-                                page_size_mask & (1<<PG_LEVEL_2M));
-                pos = end_pfn << PAGE_SHIFT;
-        }
-
-        /* tail is not big page (2M) alignment */
-        start_pfn = pos>>PAGE_SHIFT;
-        end_pfn = end>>PAGE_SHIFT;
-        nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
-
-        /* try to merge same page size and continuous */
-        for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
-                unsigned long old_start;
-                if (mr[i].end != mr[i+1].start ||
-                    mr[i].page_size_mask != mr[i+1].page_size_mask)
-                        continue;
-                /* move it */
-                old_start = mr[i].start;
-                memmove(&mr[i], &mr[i+1],
-                         (nr_range - 1 - i) * sizeof (struct map_range));
-                mr[i--].start = old_start;
-                nr_range--;
-        }
-
-        for (i = 0; i < nr_range; i++)
-                printk(KERN_DEBUG " %010lx - %010lx page %s\n",
-                                mr[i].start, mr[i].end,
-                        (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
-                         (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
-
-        if (!after_bootmem)
-                find_early_table_space(end, use_pse, use_gbpages);
-
-        for (i = 0; i < nr_range; i++)
-                last_map_addr = kernel_physical_mapping_init(
-                                        mr[i].start, mr[i].end,
-                                        mr[i].page_size_mask);
-
-        if (!after_bootmem)
-                mmu_cr4_features = read_cr4();
-        __flush_tlb_all();
-
-        if (!after_bootmem && table_end > table_start)
-                reserve_early(table_start << PAGE_SHIFT,
-                                 table_end << PAGE_SHIFT, "PGTABLE");
-
-        printk(KERN_INFO "last_map_addr: %lx end: %lx\n",
-                         last_map_addr, end);
-
-        if (!after_bootmem)
-                early_memtest(start, end);
-
-        return last_map_addr >> PAGE_SHIFT;
-}
-
 #ifndef CONFIG_NUMA
 void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 {
@@ -910,28 +681,6 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
-/*
- * devmem_is_allowed() checks to see if /dev/mem access to a certain address
- * is valid. The argument is a physical page number.
- *
- *
- * On x86, access has to be given to the first megabyte of ram because that area
- * contains bios code and data regions used by X and dosemu and similar apps.
- * Access has to be given to non-kernel-ram areas as well, these contain the PCI
- * mmio resources as well as potential bios/acpi data regions.
- */
-int devmem_is_allowed(unsigned long pagenr)
-{
-        if (pagenr <= 256)
-                return 1;
-        if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
-                return 0;
-        if (!page_is_ram(pagenr))
-                return 1;
-        return 0;
-}
-
-
 static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
                          kcore_modules, kcore_vsyscall;
 
@@ -1019,13 +768,6 @@ void mark_rodata_ro(void)
 
 #endif
 
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-        free_init_pages("initrd memory", start, end);
-}
-#endif
-
 int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
                                    int flags)
 {
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 433f7bd4648a..62773abdf088 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -38,8 +38,7 @@ unsigned long __phys_addr(unsigned long x)
         } else {
                 VIRTUAL_BUG_ON(x < PAGE_OFFSET);
                 x -= PAGE_OFFSET;
-                VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM :
-                                        !phys_addr_valid(x));
+                VIRTUAL_BUG_ON(!phys_addr_valid(x));
         }
         return x;
 }
@@ -56,10 +55,8 @@ bool __virt_addr_valid(unsigned long x)
                 if (x < PAGE_OFFSET)
                         return false;
                 x -= PAGE_OFFSET;
-                if (system_state == SYSTEM_BOOTING ?
-                                x > MAXMEM : !phys_addr_valid(x)) {
+                if (!phys_addr_valid(x))
                         return false;
-                }
         }
 
         return pfn_valid(x >> PAGE_SHIFT);
@@ -76,10 +73,9 @@ static inline int phys_addr_valid(unsigned long addr)
 #ifdef CONFIG_DEBUG_VIRTUAL
 unsigned long __phys_addr(unsigned long x)
 {
-        /* VMALLOC_* aren't constants; not available at the boot time */
+        /* VMALLOC_* aren't constants  */
         VIRTUAL_BUG_ON(x < PAGE_OFFSET);
-        VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
-                is_vmalloc_addr((void *) x));
+        VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
         return x - PAGE_OFFSET;
 }
 EXPORT_SYMBOL(__phys_addr);
@@ -89,7 +85,7 @@ bool __virt_addr_valid(unsigned long x)
 {
         if (x < PAGE_OFFSET)
                 return false;
-        if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
+        if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
                 return false;
         return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
 }
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 451fe95a0352..3daefa04ace5 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -416,10 +416,11 @@ void __init initmem_init(unsigned long start_pfn,
         for_each_online_node(nid)
                 propagate_e820_map_node(nid);
 
-        for_each_online_node(nid)
+        for_each_online_node(nid) {
                 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+                NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
+        }
 
-        NODE_DATA(0)->bdata = &bootmem_node_data[0];
         setup_bootmem_allocator();
 }