mm: memory: remove ->vm_file check on shared writable vmas
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@cmpxchg.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memory.c b/mm/memory.c
index 9aa0921..0e9b326 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2127,9 +2127,7 @@
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) {
@@ -2971,8 +2969,7 @@
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;