[RESEND PATCH 1/3] Mutex: Accelerate lock acquisition by queuing spinner

[Joseph Myers]

On Mon, 17 Dec 2018, Kemi Wang wrote:

> +/* Copyright (C) 2018 Free Software Foundation, Inc.

New files should have a descriptive comment on the first line, before the 
copyright notices (this applies to multiple files in this patch).

New user-visible features should have a NEWS entry.

-- 
Joseph S. Myers
joseph@codesourcery.com