From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.101.70]:55592 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750749AbeDXPkh (ORCPT ); Tue, 24 Apr 2018 11:40:37 -0400 Date: Tue, 24 Apr 2018 16:40:56 +0100 From: Will Deacon To: "Jason A. Donenfeld" Cc: linux-arm-kernel@lists.infradead.org, LKML , Ard Biesheuvel , PaX Team , stable@vger.kernel.org Subject: Re: [PATCH] arm64: export tishift functions to modules Message-ID: <20180424154055.GC25964@arm.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: stable-owner@vger.kernel.org List-ID: On Tue, Apr 24, 2018 at 03:43:04PM +0200, Jason A. Donenfeld wrote: > On Tue, Apr 24, 2018 at 3:34 PM, Will Deacon wrote: > > I've not run into any build issues here -- is this specifically with some > > out-of-tree module? > > I received a bug report email about this. I'm not sure which specific > module, and I assumed from the email that it was actually a result of > in-tree configuration options rather than an out-of-tree module, but > I'm not sure exactly. Either way, I was able to reproduce the problem > by coding up a little PoC out-of-tree module, so it is certainly a > real problem. Any chance you could share the module, please? I tried to write one but the compiler just inlines the __in128 arithmetic. Will