[PATCH v9 30/34] vfs: convert do_file_open_root to use retry_estale helper

[Jeff Layton <jlayton@redhat.com>]

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/namei.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c
index 45a45d7..fbfeb88 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3028,6 +3028,7 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
 	struct nameidata nd;
 	struct file *file;
 	struct filename filename = { .name = name };
+	unsigned int try = 0;
 
 	nd.root.mnt = mnt;
 	nd.root.dentry = dentry;
@@ -3040,7 +3041,7 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
 	file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_RCU);
 	if (unlikely(file == ERR_PTR(-ECHILD)))
 		file = path_openat(-1, &filename, &nd, op, flags);
-	if (unlikely(file == ERR_PTR(-ESTALE)))
+	while (retry_estale(PTR_ERR(file), try++))
 		file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_REVAL);
 	return file;
 }
-- 
1.7.11.7