1 files changed, 6 insertions, 5 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 0aa34669ed3f..2362b646178e 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -52,6 +52,7 @@
 #include <asm/cacheflush.h>
 #include <asm/init.h>
 #include <asm/uv/uv.h>
+#include <asm/setup.h>
 
 static int __init parse_direct_gbpages_off(char *arg)
 {
@@ -294,18 +295,18 @@ void __init init_extra_mapping_uc(unsigned long phys, unsigned long size)
  * to the compile time generated pmds. This results in invalid pmds up
  * to the point where we hit the physaddr 0 mapping.
  *
- * We limit the mappings to the region from _text to _end.  _end is
- * rounded up to the 2MB boundary. This catches the invalid pmds as
+ * We limit the mappings to the region from _text to _brk_end.  _brk_end
+ * is rounded up to the 2MB boundary. This catches the invalid pmds as
  * well, as they are located before _text:
  */
 void __init cleanup_highmap(void)
 {
         unsigned long vaddr = __START_KERNEL_map;
-        unsigned long end = roundup((unsigned long)_end, PMD_SIZE) - 1;
+        unsigned long vaddr_end = __START_KERNEL_map + (max_pfn_mapped << PAGE_SHIFT);
+        unsigned long end = roundup((unsigned long)_brk_end, PMD_SIZE) - 1;
         pmd_t *pmd = level2_kernel_pgt;
-        pmd_t *last_pmd = pmd + PTRS_PER_PMD;
 
-        for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) {
+        for (; vaddr + PMD_SIZE - 1 < vaddr_end; pmd++, vaddr += PMD_SIZE) {
                 if (pmd_none(*pmd))
                         continue;
                 if (vaddr < (unsigned long) _text || vaddr > end)