Merge branch 'x86/core' into core/percpu

11 files changed, 233 insertions, 229 deletions

diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 2b938a38491..08537747cb5 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -1,4 +1,4 @@
-obj-y	:=  init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
+obj-y	:=  init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
 	    pat.o pgtable.o gup.o
 
 obj-$(CONFIG_SMP)		+= tlb.o
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index bcc079c282d..00f127c80b0 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -1,5 +1,6 @@
 #include <linux/highmem.h>
 #include <linux/module.h>
+#include <linux/swap.h> /* for totalram_pages */
 
 void *kmap(struct page *page)
 {
@@ -156,3 +157,36 @@ EXPORT_SYMBOL(kmap);
 EXPORT_SYMBOL(kunmap);
 EXPORT_SYMBOL(kmap_atomic);
 EXPORT_SYMBOL(kunmap_atomic);
+
+#ifdef CONFIG_NUMA
+void __init set_highmem_pages_init(void)
+{
+	struct zone *zone;
+	int nid;
+
+	for_each_zone(zone) {
+		unsigned long zone_start_pfn, zone_end_pfn;
+
+		if (!is_highmem(zone))
+			continue;
+
+		zone_start_pfn = zone->zone_start_pfn;
+		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
+
+		nid = zone_to_nid(zone);
+		printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n",
+				zone->name, nid, zone_start_pfn, zone_end_pfn);
+
+		add_highpages_with_active_regions(nid, zone_start_pfn,
+				 zone_end_pfn);
+	}
+	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
new file mode 100644
index 00000000000..ce6a722587d
--- /dev/null
+++ b/arch/x86/mm/init.c
@@ -0,0 +1,49 @@
+#include <linux/swap.h>
+#include <asm/cacheflush.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+#include <asm/system.h>
+
+void free_init_pages(char *what, unsigned long begin, unsigned long end)
+{
+	unsigned long addr = begin;
+
+	if (addr >= end)
+		return;
+
+	/*
+	 * If debugging page accesses then do not free this memory but
+	 * mark them not present - any buggy init-section access will
+	 * create a kernel page fault:
+	 */
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
+		begin, PAGE_ALIGN(end));
+	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
+#else
+	/*
+	 * We just marked the kernel text read only above, now that
+	 * we are going to free part of that, we need to make that
+	 * writeable first.
+	 */
+	set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
+
+	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
+
+	for (; addr < end; addr += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(addr));
+		init_page_count(virt_to_page(addr));
+		memset((void *)(addr & ~(PAGE_SIZE-1)),
+			POISON_FREE_INITMEM, PAGE_SIZE);
+		free_page(addr);
+		totalram_pages++;
+	}
+#endif
+}
+
+void free_initmem(void)
+{
+	free_init_pages("unused kernel memory",
+			(unsigned long)(&__init_begin),
+			(unsigned long)(&__init_end));
+}
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index ef0bb941cdf..47df0e1bbeb 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -50,8 +50,6 @@
 #include <asm/setup.h>
 #include <asm/cacheflush.h>
 
-unsigned int __VMALLOC_RESERVE = 128 << 20;
-
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
 
@@ -486,22 +484,10 @@ void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
 	work_with_active_regions(nid, add_highpages_work_fn, &data);
 }
 
-#ifndef CONFIG_NUMA
-static void __init set_highmem_pages_init(void)
-{
-	add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
-
-	totalram_pages += totalhigh_pages;
-}
-#endif /* !CONFIG_NUMA */
-
 #else
 static inline void permanent_kmaps_init(pgd_t *pgd_base)
 {
 }
-static inline void set_highmem_pages_init(void)
-{
-}
 #endif /* CONFIG_HIGHMEM */
 
 void __init native_pagetable_setup_start(pgd_t *base)
@@ -864,10 +850,10 @@ 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 = PAGE_ALIGN(puds * sizeof(pud_t));
+	tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
 
 	pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
-	tables += PAGE_ALIGN(pmds * sizeof(pmd_t));
+	tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
 
 	if (use_pse) {
 		unsigned long extra;
@@ -878,10 +864,10 @@ static void __init find_early_table_space(unsigned long end, int use_pse)
 	} else
 		ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
 
-	tables += PAGE_ALIGN(ptes * sizeof(pte_t));
+	tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
 
 	/* for fixmap */
-	tables += PAGE_ALIGN(__end_of_fixed_addresses * sizeof(pte_t));
+	tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
 
 	/*
 	 * RED-PEN putting page tables only on node 0 could
@@ -1231,45 +1217,6 @@ void mark_rodata_ro(void)
 }
 #endif
 
-void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
-#ifdef CONFIG_DEBUG_PAGEALLOC
-	/*
-	 * If debugging page accesses then do not free this memory but
-	 * mark them not present - any buggy init-section access will
-	 * create a kernel page fault:
-	 */
-	printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
-		begin, PAGE_ALIGN(end));
-	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
-#else
-	unsigned long addr;
-
-	/*
-	 * We just marked the kernel text read only above, now that
-	 * we are going to free part of that, we need to make that
-	 * writeable first.
-	 */
-	set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
-
-	for (addr = begin; addr < end; addr += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
-		free_page(addr);
-		totalram_pages++;
-	}
-	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-#endif
-}
-
-void free_initmem(void)
-{
-	free_init_pages("unused kernel memory",
-			(unsigned long)(&__init_begin),
-			(unsigned long)(&__init_end));
-}
-
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 7d4e76da336..11981fc8570 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -748,6 +748,8 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	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;
@@ -979,43 +981,6 @@ void __init mem_init(void)
 		initsize >> 10);
 }
 
-void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
-	unsigned long addr = begin;
-
-	if (addr >= end)
-		return;
-
-	/*
-	 * If debugging page accesses then do not free this memory but
-	 * mark them not present - any buggy init-section access will
-	 * create a kernel page fault:
-	 */
-#ifdef CONFIG_DEBUG_PAGEALLOC
-	printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
-		begin, PAGE_ALIGN(end));
-	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
-#else
-	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-
-	for (; addr < end; addr += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		memset((void *)(addr & ~(PAGE_SIZE-1)),
-			POISON_FREE_INITMEM, PAGE_SIZE);
-		free_page(addr);
-		totalram_pages++;
-	}
-#endif
-}
-
-void free_initmem(void)
-{
-	free_init_pages("unused kernel memory",
-			(unsigned long)(&__init_begin),
-			(unsigned long)(&__init_end));
-}
-
 #ifdef CONFIG_DEBUG_RODATA
 const int rodata_test_data = 0xC3;
 EXPORT_SYMBOL_GPL(rodata_test_data);
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index ca53224fc56..04102d42ff4 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -20,6 +20,17 @@
 #include <asm/pat.h>
 #include <linux/module.h>
 
+int is_io_mapping_possible(resource_size_t base, unsigned long size)
+{
+#ifndef CONFIG_X86_PAE
+	/* There is no way to map greater than 1 << 32 address without PAE */
+	if (base + size > 0x100000000ULL)
+		return 0;
+#endif
+	return 1;
+}
+EXPORT_SYMBOL_GPL(is_io_mapping_possible);
+
 /* Map 'pfn' using fixed map 'type' and protections 'prot'
  */
 void *
diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c
index 9cab18b0b85..0bcd7883d03 100644
--- a/arch/x86/mm/memtest.c
+++ b/arch/x86/mm/memtest.c
@@ -9,44 +9,44 @@
 
 #include <asm/e820.h>
 
-static void __init memtest(unsigned long start_phys, unsigned long size,
-				 unsigned pattern)
+static u64 patterns[] __initdata = {
+	0,
+	0xffffffffffffffffULL,
+	0x5555555555555555ULL,
+	0xaaaaaaaaaaaaaaaaULL,
+	0x1111111111111111ULL,
+	0x2222222222222222ULL,
+	0x4444444444444444ULL,
+	0x8888888888888888ULL,
+	0x3333333333333333ULL,
+	0x6666666666666666ULL,
+	0x9999999999999999ULL,
+	0xccccccccccccccccULL,
+	0x7777777777777777ULL,
+	0xbbbbbbbbbbbbbbbbULL,
+	0xddddddddddddddddULL,
+	0xeeeeeeeeeeeeeeeeULL,
+	0x7a6c7258554e494cULL, /* yeah ;-) */
+};
+
+static void __init reserve_bad_mem(u64 pattern, u64 start_bad, u64 end_bad)
 {
-	unsigned long i;
-	unsigned long *start;
-	unsigned long start_bad;
-	unsigned long last_bad;
-	unsigned long val;
-	unsigned long start_phys_aligned;
-	unsigned long count;
-	unsigned long incr;
-
-	switch (pattern) {
-	case 0:
-		val = 0UL;
-		break;
-	case 1:
-		val = -1UL;
-		break;
-	case 2:
-#ifdef CONFIG_X86_64
-		val = 0x5555555555555555UL;
-#else
-		val = 0x55555555UL;
-#endif
-		break;
-	case 3:
-#ifdef CONFIG_X86_64
-		val = 0xaaaaaaaaaaaaaaaaUL;
-#else
-		val = 0xaaaaaaaaUL;
-#endif
-		break;
-	default:
-		return;
-	}
+	printk(KERN_INFO "  %016llx bad mem addr %010llx - %010llx reserved\n",
+	       (unsigned long long) pattern,
+	       (unsigned long long) start_bad,
+	       (unsigned long long) end_bad);
+	reserve_early(start_bad, end_bad, "BAD RAM");
+}
 
-	incr = sizeof(unsigned long);
+static void __init memtest(u64 pattern, u64 start_phys, u64 size)
+{
+	u64 i, count;
+	u64 *start;
+	u64 start_bad, last_bad;
+	u64 start_phys_aligned;
+	size_t incr;
+
+	incr = sizeof(pattern);
 	start_phys_aligned = ALIGN(start_phys, incr);
 	count = (size - (start_phys_aligned - start_phys))/incr;
 	start = __va(start_phys_aligned);
@@ -54,25 +54,42 @@ static void __init memtest(unsigned long start_phys, unsigned long size,
 	last_bad = 0;
 
 	for (i = 0; i < count; i++)
-		start[i] = val;
+		start[i] = pattern;
 	for (i = 0; i < count; i++, start++, start_phys_aligned += incr) {
-		if (*start != val) {
-			if (start_phys_aligned == last_bad + incr) {
-				last_bad += incr;
-			} else {
-				if (start_bad) {
-					printk(KERN_CONT "\n  %016lx bad mem addr %010lx - %010lx reserved",
-						val, start_bad, last_bad + incr);
-					reserve_early(start_bad, last_bad + incr, "BAD RAM");
-				}
-				start_bad = last_bad = start_phys_aligned;
-			}
+		if (*start == pattern)
+			continue;
+		if (start_phys_aligned == last_bad + incr) {
+			last_bad += incr;
+			continue;
 		}
+		if (start_bad)
+			reserve_bad_mem(pattern, start_bad, last_bad + incr);
+		start_bad = last_bad = start_phys_aligned;
 	}
-	if (start_bad) {
-		printk(KERN_CONT "\n  %016lx bad mem addr %010lx - %010lx reserved",
-			val, start_bad, last_bad + incr);
-		reserve_early(start_bad, last_bad + incr, "BAD RAM");
+	if (start_bad)
+		reserve_bad_mem(pattern, start_bad, last_bad + incr);
+}
+
+static void __init do_one_pass(u64 pattern, u64 start, u64 end)
+{
+	u64 size = 0;
+
+	while (start < end) {
+		start = find_e820_area_size(start, &size, 1);
+
+		/* done ? */
+		if (start >= end)
+			break;
+		if (start + size > end)
+			size = end - start;
+
+		printk(KERN_INFO "  %010llx - %010llx pattern %016llx\n",
+		       (unsigned long long) start,
+		       (unsigned long long) start + size,
+		       (unsigned long long) cpu_to_be64(pattern));
+		memtest(pattern, start, size);
+
+		start += size;
 	}
 }
 
@@ -90,33 +107,22 @@ early_param("memtest", parse_memtest);
 
 void __init early_memtest(unsigned long start, unsigned long end)
 {
-	u64 t_start, t_size;
-	unsigned pattern;
+	unsigned int i;
+	unsigned int idx = 0;
 
 	if (!memtest_pattern)
 		return;
 
-	printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
-	for (pattern = 0; pattern < memtest_pattern; pattern++) {
-		t_start = start;
-		t_size = 0;
-		while (t_start < end) {
-			t_start = find_e820_area_size(t_start, &t_size, 1);
-
-			/* done ? */
-			if (t_start >= end)
-				break;
-			if (t_start + t_size > end)
-				t_size = end - t_start;
-
-			printk(KERN_CONT "\n  %010llx - %010llx pattern %d",
-				(unsigned long long)t_start,
-				(unsigned long long)t_start + t_size, pattern);
-
-			memtest(t_start, t_size, pattern);
+	printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern);
+	for (i = 0; i < memtest_pattern; i++) {
+		idx = i % ARRAY_SIZE(patterns);
+		do_one_pass(patterns[idx], start, end);
+	}
 
-			t_start += t_size;
-		}
+	if (idx > 0) {
+		printk(KERN_INFO "early_memtest: wipe out "
+		       "test pattern from memory\n");
+		/* additional test with pattern 0 will do this */
+		do_one_pass(0, start, end);
 	}
-	printk(KERN_CONT "\n");
 }
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 3957cd6d645..451fe95a035 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -423,32 +423,6 @@ void __init initmem_init(unsigned long start_pfn,
 	setup_bootmem_allocator();
 }
 
-void __init set_highmem_pages_init(void)
-{
-#ifdef CONFIG_HIGHMEM
-	struct zone *zone;
-	int nid;
-
-	for_each_zone(zone) {
-		unsigned long zone_start_pfn, zone_end_pfn;
-
-		if (!is_highmem(zone))
-			continue;
-
-		zone_start_pfn = zone->zone_start_pfn;
-		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
-
-		nid = zone_to_nid(zone);
-		printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n",
-				zone->name, nid, zone_start_pfn, zone_end_pfn);
-
-		add_highpages_with_active_regions(nid, zone_start_pfn,
-				 zone_end_pfn);
-	}
-	totalram_pages += totalhigh_pages;
-#endif
-}
-
 #ifdef CONFIG_MEMORY_HOTPLUG
 static int paddr_to_nid(u64 addr)
 {
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 05f9aef6818..2ed37158012 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -11,6 +11,7 @@
 #include <linux/bootmem.h>
 #include <linux/debugfs.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
@@ -634,6 +635,33 @@ void unmap_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot)
 }
 
 /*
+ * Change the memory type for the physial address range in kernel identity
+ * mapping space if that range is a part of identity map.
+ */
+int kernel_map_sync_memtype(u64 base, unsigned long size, unsigned long flags)
+{
+	unsigned long id_sz;
+
+	if (!pat_enabled || base >= __pa(high_memory))
+		return 0;
+
+	id_sz = (__pa(high_memory) < base + size) ?
+				__pa(high_memory) - base :
+				size;
+
+	if (ioremap_change_attr((unsigned long)__va(base), id_sz, flags) < 0) {
+		printk(KERN_INFO
+			"%s:%d ioremap_change_attr failed %s "
+			"for %Lx-%Lx\n",
+			current->comm, current->pid,
+			cattr_name(flags),
+			base, (unsigned long long)(base + size));
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/*
  * Internal interface to reserve a range of physical memory with prot.
  * Reserved non RAM regions only and after successful reserve_memtype,
  * this func also keeps identity mapping (if any) in sync with this new prot.
@@ -642,7 +670,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
 				int strict_prot)
 {
 	int is_ram = 0;
-	int id_sz, ret;
+	int ret;
 	unsigned long flags;
 	unsigned long want_flags = (pgprot_val(*vma_prot) & _PAGE_CACHE_MASK);
 
@@ -679,23 +707,8 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
 				     flags);
 	}
 
-	/* Need to keep identity mapping in sync */
-	if (paddr >= __pa(high_memory))
-		return 0;
-
-	id_sz = (__pa(high_memory) < paddr + size) ?
-				__pa(high_memory) - paddr :
-				size;
-
-	if (ioremap_change_attr((unsigned long)__va(paddr), id_sz, flags) < 0) {
+	if (kernel_map_sync_memtype(paddr, size, flags) < 0) {
 		free_memtype(paddr, paddr + size);
-		printk(KERN_ERR
-			"%s:%d reserve_pfn_range ioremap_change_attr failed %s "
-			"for %Lx-%Lx\n",
-			current->comm, current->pid,
-			cattr_name(flags),
-			(unsigned long long)paddr,
-			(unsigned long long)(paddr + size));
 		return -EINVAL;
 	}
 	return 0;
@@ -877,6 +890,7 @@ pgprot_t pgprot_writecombine(pgprot_t prot)
 	else
 		return pgprot_noncached(prot);
 }
+EXPORT_SYMBOL_GPL(pgprot_writecombine);
 
 #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_X86_PAT)
 
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 86f2ffc43c3..5b7c7c8464f 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -313,6 +313,24 @@ int ptep_clear_flush_young(struct vm_area_struct *vma,
 	return young;
 }
 
+/**
+ * reserve_top_address - reserves a hole in the top of kernel address space
+ * @reserve - size of hole to reserve
+ *
+ * Can be used to relocate the fixmap area and poke a hole in the top
+ * of kernel address space to make room for a hypervisor.
+ */
+void __init reserve_top_address(unsigned long reserve)
+{
+#ifdef CONFIG_X86_32
+	BUG_ON(fixmaps_set > 0);
+	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
+	       (int)-reserve);
+	__FIXADDR_TOP = -reserve - PAGE_SIZE;
+	__VMALLOC_RESERVE += reserve;
+#endif
+}
+
 int fixmaps_set;
 
 void __native_set_fixmap(enum fixed_addresses idx, pte_t pte)
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 0951db9ee51..f2e477c91c1 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -20,6 +20,8 @@
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 
+unsigned int __VMALLOC_RESERVE = 128 << 20;
+
 /*
  * Associate a virtual page frame with a given physical page frame 
  * and protection flags for that frame.
@@ -97,22 +99,6 @@ void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
 unsigned long __FIXADDR_TOP = 0xfffff000;
 EXPORT_SYMBOL(__FIXADDR_TOP);
 
-/**
- * reserve_top_address - reserves a hole in the top of kernel address space
- * @reserve - size of hole to reserve
- *
- * Can be used to relocate the fixmap area and poke a hole in the top
- * of kernel address space to make room for a hypervisor.
- */
-void __init reserve_top_address(unsigned long reserve)
-{
-	BUG_ON(fixmaps_set > 0);
-	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
-	       (int)-reserve);
-	__FIXADDR_TOP = -reserve - PAGE_SIZE;
-	__VMALLOC_RESERVE += reserve;
-}
-
 /*
  * vmalloc=size forces the vmalloc area to be exactly 'size'
  * bytes. This can be used to increase (or decrease) the