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-rw-r--r--fs/overlayfs/file.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 7590e43369f6..c49af241c001 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -110,6 +110,9 @@ static int ovl_open(struct inode *inode, struct file *file)
if (IS_ERR(realfile))
return PTR_ERR(realfile);
+ /* For O_DIRECT dentry_open() checks f_mapping->a_ops->direct_IO */
+ file->f_mapping = realfile->f_mapping;
+
file->private_data = realfile;
return 0;