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-rw-r--r--arch/x86/mm/init_32.c3
-rw-r--r--arch/x86/mm/init_64.c3
-rw-r--r--arch/x86/mm/ioremap.c33
3 files changed, 32 insertions, 7 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c3789bb1930..bbe044dbe01 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -31,6 +31,7 @@
#include <linux/cpumask.h>
#include <asm/asm.h>
+#include <asm/bios_ebda.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -969,6 +970,8 @@ void __init mem_init(void)
int codesize, reservedpages, datasize, initsize;
int tmp;
+ start_periodic_check_for_corruption();
+
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
#endif
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 83e13f2d53d..3e10054c573 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -31,6 +31,7 @@
#include <linux/nmi.h>
#include <asm/processor.h>
+#include <asm/bios_ebda.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -881,6 +882,8 @@ void __init mem_init(void)
{
long codesize, reservedpages, datasize, initsize;
+ start_periodic_check_for_corruption();
+
pci_iommu_alloc();
/* clear_bss() already clear the empty_zero_page */
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 10b52309aef..8cbeda15cd2 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -24,18 +24,26 @@
#ifdef CONFIG_X86_64
-unsigned long __phys_addr(unsigned long x)
+static inline int phys_addr_valid(unsigned long addr)
{
- if (x >= __START_KERNEL_map)
- return x - __START_KERNEL_map + phys_base;
- return x - PAGE_OFFSET;
+ return addr < (1UL << boot_cpu_data.x86_phys_bits);
}
-EXPORT_SYMBOL(__phys_addr);
-static inline int phys_addr_valid(unsigned long addr)
+unsigned long __phys_addr(unsigned long x)
{
- return addr < (1UL << boot_cpu_data.x86_phys_bits);
+ if (x >= __START_KERNEL_map) {
+ x -= __START_KERNEL_map;
+ VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
+ x += phys_base;
+ } else {
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+ x -= PAGE_OFFSET;
+ VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM :
+ !phys_addr_valid(x));
+ }
+ return x;
}
+EXPORT_SYMBOL(__phys_addr);
#else
@@ -44,6 +52,17 @@ static inline int phys_addr_valid(unsigned long addr)
return 1;
}
+#ifdef CONFIG_DEBUG_VIRTUAL
+unsigned long __phys_addr(unsigned long x)
+{
+ /* VMALLOC_* aren't constants; not available at the boot time */
+ VIRTUAL_BUG_ON(x < PAGE_OFFSET || (system_state != SYSTEM_BOOTING &&
+ is_vmalloc_addr((void *)x)));
+ return x - PAGE_OFFSET;
+}
+EXPORT_SYMBOL(__phys_addr);
+#endif
+
#endif
int page_is_ram(unsigned long pagenr)