linux-kernel - Re: [PATCH 150/150] kernel/signal.c: use __ARCH_HAS_SA_RESTORER instead of SA

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Message-ID: <20130327151607.GA17221@hercules>
Date:	Wed, 27 Mar 2013 15:16:07 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	PaX Team <pageexec@...email.hu>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com, Emese Revfy <re.emese@...il.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Oleg Nesterov <oleg@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Julien Tinnes <jln@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 150/150] kernel/signal.c: use __ARCH_HAS_SA_RESTORER
 instead of SA_RESTORER

On Wed, Mar 27, 2013 at 03:53:25PM +0100, PaX Team wrote:
> sorry if you got this twice, had smtpd problems...
> 
> On 26 Mar 2013 at 15:20, Luis Henriques wrote:
> 
> > 3.5.7.9 -stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Andrew Morton <akpm@...ux-foundation.org>
> > 
> > commit 522cff142d7d2f9230839c9e1f21a4d8bcc22a4a upstream.
> > 
> > __ARCH_HAS_SA_RESTORER is the preferred conditional for use in 3.9 and
> > later kernels, per Kees.
> 
> does __ARCH_HAS_SA_RESTORER exist in the 3.5 stable series at all? i thought it
> was new to 3.9...

You're right, __ARCH_HAS_SA_RESTORER has been added on 3.9 only.
However, due to build failures for some archs (mips, ia64, ...) using
the upstream 2ca39528c01a933f6689cd6505ce65bd6d68a530 commit, Ben
Hutchings has cooked a patch that adds this definition to stable
series.

This patch is currently under review for the 3.5 kernel:

[PATCH 149/150] signal: Define __ARCH_HAS_SA_RESTORER so we know whether to clear sa_restorer

Cheers,
--
Luis
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