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-rw-r--r--mm/mmap.c26
1 files changed, 6 insertions, 20 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 8d95902..d3fa10a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1134,16 +1134,11 @@ munmap_back:
}
/*
- * Can we just expand an old private anonymous mapping?
- * The VM_SHARED test is necessary because shmem_zero_setup
- * will create the file object for a shared anonymous map below.
+ * Can we just expand an old mapping?
*/
- if (!file && !(vm_flags & VM_SHARED)) {
- vma = vma_merge(mm, prev, addr, addr + len, vm_flags,
- NULL, NULL, pgoff, NULL);
- if (vma)
- goto out;
- }
+ vma = vma_merge(mm, prev, addr, addr + len, vm_flags, NULL, file, pgoff, NULL);
+ if (vma)
+ goto out;
/*
* Determine the object being mapped and call the appropriate
@@ -1206,17 +1201,8 @@ munmap_back:
if (vma_wants_writenotify(vma))
vma->vm_page_prot = vm_get_page_prot(vm_flags & ~VM_SHARED);
- if (file && vma_merge(mm, prev, addr, vma->vm_end,
- vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
- mpol_put(vma_policy(vma));
- kmem_cache_free(vm_area_cachep, vma);
- fput(file);
- if (vm_flags & VM_EXECUTABLE)
- removed_exe_file_vma(mm);
- } else {
- vma_link(mm, vma, prev, rb_link, rb_parent);
- file = vma->vm_file;
- }
+ vma_link(mm, vma, prev, rb_link, rb_parent);
+ file = vma->vm_file;
/* Once vma denies write, undo our temporary denial count */
if (correct_wcount)
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