3 files changed, 13 insertions, 5 deletions

diff --git a/arch/ppc64/kernel/vdso.c b/arch/ppc64/kernel/vdso.c
index efa985f05aca..4aacf521e3e4 100644
--- a/arch/ppc64/kernel/vdso.c
+++ b/arch/ppc64/kernel/vdso.c
@@ -176,13 +176,13 @@ static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
                 return NOPAGE_SIGBUS;
 
         /*
-         * Last page is systemcfg, special handling here, no get_page() a
-         * this is a reserved page
+         * Last page is systemcfg.
          */
         if ((vma->vm_end - address) <= PAGE_SIZE)
-                return virt_to_page(systemcfg);
+                pg = virt_to_page(systemcfg);
+        else
+                pg = virt_to_page(vbase + offset);
 
-        pg = virt_to_page(vbase + offset);
         get_page(pg);
         DBG(" ->page count: %d\n", page_count(pg));
 
@@ -259,7 +259,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack)
          * gettimeofday will be totally dead. It's fine to use that for setting
          * breakpoints in the vDSO code pages though
          */
-        vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
+        vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | VM_RESERVED;
         vma->vm_flags |= mm->def_flags;
         vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
         vma->vm_ops = &vdso_vmops;
@@ -603,6 +603,8 @@ void __init vdso_init(void)
                 ClearPageReserved(pg);
                 get_page(pg);
         }
+
+        get_page(virt_to_page(systemcfg));
 }
 
 int in_gate_area_no_task(unsigned long addr)
diff --git a/arch/sparc/mm/generic.c b/arch/sparc/mm/generic.c
index 20ccb957fb77..659c9a71f867 100644
--- a/arch/sparc/mm/generic.c
+++ b/arch/sparc/mm/generic.c
@@ -73,6 +73,9 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
         int space = GET_IOSPACE(pfn);
         unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
 
+        /* See comment in mm/memory.c remap_pfn_range */
+        vma->vm_flags |= VM_IO | VM_RESERVED;
+
         prot = __pgprot(pg_iobits);
         offset -= from;
         dir = pgd_offset(mm, from);
diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index c954d91f01d0..afc01cec701f 100644
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -127,6 +127,9 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
         int space = GET_IOSPACE(pfn);
         unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
 
+        /* See comment in mm/memory.c remap_pfn_range */
+        vma->vm_flags |= VM_IO | VM_RESERVED;
+
         prot = __pgprot(pg_iobits);
         offset -= from;
         dir = pgd_offset(mm, from);