linux-kernel - Re: [PATCH] llist: Fix missing lockless

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Message-ID: <20150208002939.GA2504@kroah.com>
Date:	Sun, 8 Feb 2015 08:29:39 +0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Matt Turner <mattst88@...il.com>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-alpha <linux-alpha@...r.kernel.org>,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Huang Ying <ying.huang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Pranith Kumar <bobby.prani@...il.com>, stable@...r.kernel.org
Subject: Re: [PATCH] llist: Fix missing lockless_dereference()

On Sat, Feb 07, 2015 at 04:18:14PM -0800, Matt Turner wrote:
> On Sat, Feb 7, 2015 at 2:30 PM, Mathieu Desnoyers
> <mathieu.desnoyers@...icios.com> wrote:
> > ----- Original Message -----
> >> From: "Greg KH" <gregkh@...uxfoundation.org>
> >> To: "Mathieu Desnoyers" <mathieu.desnoyers@...icios.com>
> >> Cc: "Huang Ying" <ying.huang@...el.com>, linux-kernel@...r.kernel.org, "Paul McKenney" <paulmck@...ux.vnet.ibm.com>,
> >> "David Howells" <dhowells@...hat.com>, "Pranith Kumar" <bobby.prani@...il.com>, stable@...r.kernel.org
> >> Sent: Saturday, February 7, 2015 5:16:25 PM
> >> Subject: Re: [PATCH] llist: Fix missing lockless_dereference()
> >>
> >> On Fri, Feb 06, 2015 at 09:08:21PM -0500, Mathieu Desnoyers wrote:
> >> > A lockless_dereference() appears to be missing in llist_del_first().
> >> > It should only matter for Alpha in practice.
> >>
> >> Meta-comment, do we really care about Alpha anymore?  Is it still
> >> consered an "active" arch we support?  I haven't seen a single
> >> alpha-related stable patch in _years_ if at all, which implies to me
> >> that no one is even using it.
> >>
> >> Not that stable patches for architectures are a valid reference for how
> >> much they are used, but it does give me a good indication of what arches
> >> have users that actually care about a modern (i.e. within the past 5
> >> years) kernel.
> >
> > Good question. Adding the Alpha maintainers to the CC.
> >
> > Thanks,
> >
> > Mathieu
> 
> Hello,
> 
> Yes, Gentoo has a maintained Alpha port. We care about having modern
> kernels (though I have not personally had a lot of time to work on
> that recently)

Ok, fair enough, thanks for letting me know.  I guess we can't drop it
just yet :)

greg k-h
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