Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423353AbdD3OM5 (ORCPT ); Sun, 30 Apr 2017 10:12:57 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:41015 "EHLO out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422990AbdD3OMs (ORCPT ); Sun, 30 Apr 2017 10:12:48 -0400 X-ME-Sender: X-Sasl-enc: wvy/bSr5bDg5D5YPNywSEv3g7JjsI7zUlSogUOs7508+ 1493561567 Date: Sun, 30 Apr 2017 16:08:55 +0200 From: Greg KH To: Vineet Gupta Cc: "stable@vger.kernel.org" , lkml , arcml Subject: Re: 4.2+ stable inclusion request: ARCv2: save r30 on kernel entry as gcc uses it for code-gen Message-ID: <20170430140855.GA11186@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.8.2 (2017-04-18) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 488 Lines: 13 On Fri, Apr 28, 2017 at 11:57:36AM -0700, Vineet Gupta wrote: > Hi, > > Can we please backport upstream ecd43afdbe72017aefe48080631eb625e177ef4d ("ARCv2: > save r30 on kernel entry as gcc uses it for code-gen") to 4.2 to 4.9 kernels. > > While the issue cites gcc, it is general deficiency of kernel as userspace > programs can modify r30 register in hand/inline assembly and those will not be > preserved without this change. Queued up for 4.9 and 4.4 stable trees, thanks. greg k-h