Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...

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

diff --git a/mm/nommu.c b/mm/nommu.c
index 9876fa0c3ad30e75d842f965ac4417e66be6f07a..8687973462bbea8becddfe0941eb94fab60ce304 100644 (file)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1143,9 +1143,6 @@ static int do_mmap_private(struct vm_area_struct *vma,
                if (ret < rlen)
                        memset(base + ret, 0, rlen - ret);
 
-       } else {
-               /* if it's an anonymous mapping, then just clear it */
-               memset(base, 0, rlen);
        }
 
        return 0;
@@ -1343,6 +1340,11 @@ unsigned long do_mmap_pgoff(struct file *file,
                goto error_just_free;
        add_nommu_region(region);
 
+       /* clear anonymous mappings that don't ask for uninitialized data */
+       if (!vma->vm_file && !(flags & MAP_UNINITIALIZED))
+               memset((void *)region->vm_start, 0,
+                      region->vm_end - region->vm_start);
+
        /* okay... we have a mapping; now we have to register it */
        result = vma->vm_start;