mm: variable length argument support

[sfrench/cifs-2.6.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 724f342bcf898e12095638fdd7ff27a8b3617193..7afc7a7cec6f681001817ad6656d3a20d9ed53a7 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1571,33 +1571,11 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
 }
 #endif /* CONFIG_STACK_GROWSUP || CONFIG_IA64 */
 
-#ifdef CONFIG_STACK_GROWSUP
-int expand_stack(struct vm_area_struct *vma, unsigned long address)
-{
-       return expand_upwards(vma, address);
-}
-
-struct vm_area_struct *
-find_extend_vma(struct mm_struct *mm, unsigned long addr)
-{
-       struct vm_area_struct *vma, *prev;
-
-       addr &= PAGE_MASK;
-       vma = find_vma_prev(mm, addr, &prev);
-       if (vma && (vma->vm_start <= addr))
-               return vma;
-       if (!prev || expand_stack(prev, addr))
-               return NULL;
-       if (prev->vm_flags & VM_LOCKED) {
-               make_pages_present(addr, prev->vm_end);
-       }
-       return prev;
-}
-#else
 /*
  * vma is the first one with address < vma->vm_start.  Have to extend vma.
  */
-int expand_stack(struct vm_area_struct *vma, unsigned long address)
+static inline int expand_downwards(struct vm_area_struct *vma,
+                                  unsigned long address)
 {
        int error;
 
@@ -1634,6 +1612,38 @@ int expand_stack(struct vm_area_struct *vma, unsigned long address)
        return error;
 }
 
+int expand_stack_downwards(struct vm_area_struct *vma, unsigned long address)
+{
+       return expand_downwards(vma, address);
+}
+
+#ifdef CONFIG_STACK_GROWSUP
+int expand_stack(struct vm_area_struct *vma, unsigned long address)
+{
+       return expand_upwards(vma, address);
+}
+
+struct vm_area_struct *
+find_extend_vma(struct mm_struct *mm, unsigned long addr)
+{
+       struct vm_area_struct *vma, *prev;
+
+       addr &= PAGE_MASK;
+       vma = find_vma_prev(mm, addr, &prev);
+       if (vma && (vma->vm_start <= addr))
+               return vma;
+       if (!prev || expand_stack(prev, addr))
+               return NULL;
+       if (prev->vm_flags & VM_LOCKED)
+               make_pages_present(addr, prev->vm_end);
+       return prev;
+}
+#else
+int expand_stack(struct vm_area_struct *vma, unsigned long address)
+{
+       return expand_downwards(vma, address);
+}
+
 struct vm_area_struct *
 find_extend_vma(struct mm_struct * mm, unsigned long addr)
 {
@@ -1651,9 +1661,8 @@ find_extend_vma(struct mm_struct * mm, unsigned long addr)
        start = vma->vm_start;
        if (expand_stack(vma, addr))
                return NULL;
-       if (vma->vm_flags & VM_LOCKED) {
+       if (vma->vm_flags & VM_LOCKED)
                make_pages_present(addr, start);
-       }
        return vma;
 }
 #endif