1 files changed, 1 insertions, 12 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index fe376805cf5f..061e5edb4d27 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1176,17 +1176,6 @@ static int mount_is_safe(struct nameidata *nd)
 #endif
 }
 
-static int lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
-{
-        while (1) {
-                if (d == dentry)
-                        return 1;
-                if (d == NULL || d == d->d_parent)
-                        return 0;
-                d = d->d_parent;
-        }
-}
-
 struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
                                         int flag)
 {
@@ -1203,7 +1192,7 @@ struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
 
         p = mnt;
         list_for_each_entry(r, &mnt->mnt_mounts, mnt_child) {
-                if (!lives_below_in_same_fs(r->mnt_mountpoint, dentry))
+                if (!is_subdir(r->mnt_mountpoint, dentry))
                         continue;
 
                 for (s = r; s; s = next_mnt(s, r)) {