Shared anonymous mmaps are implemented with shmem files, so all VMAs
with shared writable semantics also have an underlying backing file.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
mm/memory.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c
index 72d998eb0438..5640a718ac58 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2168,9 +2168,7 @@ reuse:
balance_dirty_pages_ratelimited(mapping);
}
- /* file_update_time outside page_lock */
- if (vma->vm_file)
- file_update_time(vma->vm_file);
+ file_update_time(vma->vm_file);
}
put_page(dirty_page);
if (page_mkwrite) {
@@ -3026,8 +3024,7 @@ static int do_shared_fault(struct mm_struct *mm, struct vm_area_struct *vma,
balance_dirty_pages_ratelimited(mapping);
}
- /* file_update_time outside page_lock */
- if (vma->vm_file && !vma->vm_ops->page_mkwrite)
+ if (!vma->vm_ops->page_mkwrite)
file_update_time(vma->vm_file);
return ret;
--
2.1.3
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