clone_private_mount() doesn't need to touch namespace_sem

not for CL_PRIVATE clone_mnt()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namespace.c b/fs/namespace.c
index a1a04dd1ebfc403a11765dba590eedc34535d21a..ec726ae0057946a1554137fc1f4489b8e47e1462 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1795,9 +1795,7 @@ struct vfsmount *clone_private_mount(struct path *path)
        if (IS_MNT_UNBINDABLE(old_mnt))
                return ERR_PTR(-EINVAL);
 
-       down_read(&namespace_sem);
        new_mnt = clone_mnt(old_mnt, path->dentry, CL_PRIVATE);
-       up_read(&namespace_sem);
        if (IS_ERR(new_mnt))
                return ERR_CAST(new_mnt);