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Date: Sun, 24 Jun 2018 11:42:14 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Matthew Macy <mmacy@freebsd.org>
Cc: Adrian Chadd <adrian.chadd@gmail.com>, John Baldwin <jhb@freebsd.org>,
 "br@freebsd.org" <br@freebsd.org>,
 freebsd-current <freebsd-current@freebsd.org>, marius@freebsd.org
Subject: Re: atomic_testandclear_<type>, atomic_testandset_<type>
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On Sat, Jun 23, 2018 at 01:38:07PM -0700, Matthew Macy wrote:
> It turns out ck already has equivalent primitives. Pardon the noise.
Why not to add trivial cmpset-based implementations to the lacking
arches ?  If maintainers prefer proper ll/cs assembly, they would
have the time to do it properly without ultimatum.

It is useful to utilize consistent atomic(9) KPI across kernel.

> 
> -M
> 
> On Sat, Jun 23, 2018 at 12:18 Matthew Macy <mmacy@freebsd.org> wrote:
> 
> > The functions in the subject are both documented in atomic(9) and are
> > implemented by every arch except sparc64 and MIPS. I have some code in
> > review that uses them that I intend to commit once the various design
> > issues are addressed. Please implement them so that those targets can
> > remain part of universe.
> >
> > Thanks in advance.
> > -M
> >
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