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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfJHG9wDDfCtoWAptO/RYWXKNgAO1SXWII3irgKcEZCEFaLWdyVl5r5AATmiCYhNgKvvB3PEnDEU6GeH03nmjqgHy/oPf2LC5sSVk90J5uY6Ex8QFNXbX TTNP+w58Rh/O+w/zlLIr7J2fogFb+wKFDOIPVKgt8qbudGwzLHHWVqxSU2Wyfz4Hab6VlpcJGUyMIs4D/THqIS+uUnO8zKA/M058QK4vRnUi2Wo+A3zjKnIM X-CM-Analysis: v=2.3 cv=FKU1Odgs c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=Kd1tUaAdevIA:10 a=HHN01XlKihRcnkjSDOgA:9 a=QEXdDO2ut3YA:10 a=gqk8O8tedwFOFiKxRwwA:9 a=ONNS8QRKHyMA:10 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752069AbeD3Vap (ORCPT ); Mon, 30 Apr 2018 17:30:45 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:41329 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751461AbeD3Vao (ORCPT ); Mon, 30 Apr 2018 17:30:44 -0400 X-ME-Sender: Date: Mon, 30 Apr 2018 23:27:19 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: Boris Ostrovsky Cc: xen-devel@lists.xenproject.org, stable@vger.kernel.org, Juergen Gross , Stefano Stabellini , Greg Kroah-Hartman , open list Subject: Re: [PATCH 1/6] xen: Add RING_COPY_RESPONSE() Message-ID: <20180430212719.GF1124@mail-itl> References: <7bd2ff07-9d29-8dea-6f55-5ff24ddd433c@oracle.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="sfyO1m2EN8ZOtJL6" Content-Disposition: inline In-Reply-To: <7bd2ff07-9d29-8dea-6f55-5ff24ddd433c@oracle.com> User-Agent: Mutt/1.9.1 (2017-09-22) Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --sfyO1m2EN8ZOtJL6 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Apr 30, 2018 at 05:25:52PM -0400, Boris Ostrovsky wrote: > Also, perhaps the two can be collapsed together, along the lines of >=20 > #define RING_COPY_(action, _r, _idx, _msg) do {=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \ > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 /* Use volatile to force the c= opy into _msg. */=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \ > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 *(_msg) =3D *(volatile typeof(= _msg))RING_GET_##action(_r, _idx);=C2=A0=C2=A0 \ > } while (0) >=20 > #define RING_COPY_REQUEST(_r, _idx, _req)=C2=A0 RING_COPY_(REQUEST, _r, _= idx, > _req) > #define RING_COPY_RESPONSE(_r, _idx, _rsp)=C2=A0 RING_COPY_(RESPONSE, _r, > _idx, _rsp) >=20 >=20 > (I have not tried to compile this so it may well be wrong) It works, thanks :) I'll wait with v2 until I get feedback on other patches. --=20 Best Regards, Marek Marczykowski-G=C3=B3recki Invisible Things Lab A: Because it messes up the order in which people normally read text. 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