From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01517C43465 for ; Mon, 21 Sep 2020 08:08:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9370120874 for ; Mon, 21 Sep 2020 08:08:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b="K5wKwexm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9370120874 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=canb.auug.org.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 49FF8900044; Mon, 21 Sep 2020 04:08:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 42DDD900040; Mon, 21 Sep 2020 04:08:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 29D68900044; Mon, 21 Sep 2020 04:08:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0053.hostedemail.com [216.40.44.53]) by kanga.kvack.org (Postfix) with ESMTP id 08F49900040 for ; Mon, 21 Sep 2020 04:08:08 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id C35F63623 for ; Mon, 21 Sep 2020 08:08:07 +0000 (UTC) X-FDA: 77286340614.17.comb24_30012c127143 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin17.hostedemail.com (Postfix) with ESMTP id 93876180D01AD for ; Mon, 21 Sep 2020 08:07:58 +0000 (UTC) X-HE-Tag: comb24_30012c127143 X-Filterd-Recvd-Size: 5273 Received: from ozlabs.org (ozlabs.org [203.11.71.1]) by imf23.hostedemail.com (Postfix) with ESMTP for ; Mon, 21 Sep 2020 08:07:57 +0000 (UTC) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4BvxrN6CR4z9sRf; Mon, 21 Sep 2020 18:07:48 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1600675674; bh=iaBdLJOvxyJXfcUEqmY+3Nksf5Jf9xHCFLBtVdF2GM8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=K5wKwexmDJAci9TTwYRSQ0w9PM5CiPqAwagC2tcao/hBigyuoMxG1C8D0UmTRvwbU EhPScTRFe/siLj3BjXiyv9uIFmQY0S4UmOdPSVysuZGSDahrfPB83W3uawREPQpzd0 kHld44CU++GsPbN3dC1XVd4QoBpM6Lgj+V1kNNdSetTvjN8TgT8QvRc6F00jrjsQD6 lDVtnrJaxh5Jw5LEvG/jpEkcuTha5XPYFINClW5XVtzMcKkHT38c4BYivb3A3RLDRr JaS6Iuw/LnkzJSYvM742RWyWBJTrmzSqPEqXAqPcsYg8niNwEgDNwWig1CMgfOS4OB vkx4v/7kdkZQQ== Date: Mon, 21 Sep 2020 18:07:48 +1000 From: Stephen Rothwell To: Qian Cai Cc: Mike Rapoport , Andrew Morton , Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , David Hildenbrand , Elena Reshetova , "H. Peter Anvin" , Idan Yaniv , Ingo Molnar , James Bottomley , "Kirill A. Shutemov" , Matthew Wilcox , Mark Rutland , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Thomas Gleixner , Tycho Andersen , Will Deacon , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-next@vger.kernel.org Subject: Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas Message-ID: <20200921180748.4f88028d@canb.auug.org.au> In-Reply-To: References: <20200916073539.3552-1-rppt@kernel.org> <5d97da4d86db258fdc9b20be3c12588089e17da2.camel@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/qIGimAfxVKTvCJ+PllFC0A/"; protocol="application/pgp-signature"; micalg=pgp-sha256 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --Sig_/qIGimAfxVKTvCJ+PllFC0A/ Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, On Fri, 18 Sep 2020 14:25:15 -0400 Qian Cai wrote: > > On Thu, 2020-09-17 at 09:27 -0400, Qian Cai wrote: > > On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote: =20 > > > From: Mike Rapoport > > >=20 > > > This is an implementation of "secret" mappings backed by a file descr= iptor.=20 > > > I've dropped the boot time reservation patch for now as it is not str= ictly > > > required for the basic usage and can be easily added later either wit= h or > > > without CMA. =20 > >=20 > > On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.co= nfig > >=20 > > There is a compiling warning from the today's linux-next: > >=20 > > :1532:2: warning: #warning syscall memfd_secret not implemented = [-Wcpp] =20 >=20 > This should silence the warning: >=20 > diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh > index a18b47695f55..b7609958ee36 100755 > --- a/scripts/checksyscalls.sh > +++ b/scripts/checksyscalls.sh > @@ -40,6 +40,10 @@ cat << EOF > #define __IGNORE_setrlimit /* setrlimit */ > #endif > =20 > +#ifndef __ARCH_WANT_MEMFD_SECRET > +#define __IGNORE_memfd_secret > +#endif > + > /* Missing flags argument */ > #define __IGNORE_renameat /* renameat2 */ >=20 Added to linux-next today. --=20 Cheers, Stephen Rothwell --Sig_/qIGimAfxVKTvCJ+PllFC0A/ Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl9oX1QACgkQAVBC80lX 0GwVfQgAho6bGSHnGAjI0IiMmFRLcHM+KMH0XiVgh9bvUjVASl1mVgeIe7v//Oef uyH9zCWyUFof0EnaT4f5uZctC2pe/qvb7BsEdaSlLUSz4X8J1xLWfdYbdJHMvtYR WnrFHwGCmEtpImNTTZtXcdDZeliVgq41XGd/h1Z59o6givzPYTtIK59LlOOcZj3y KIY0ELXUPauFOINBbfRzs0xlB6upYfVrHUdh9/glsrY4wVcEfPhjgFVAk+Ua/4/E /ksLJ+WeUZxJ/2SOPL5Vm23vZvmSE0fD4krBBiANbBiKShRgJRU21uc/ulEdHh5E qZjQA6jjcKFGbIbi78Sb6LxIzI/mKQ== =OfZk -----END PGP SIGNATURE----- --Sig_/qIGimAfxVKTvCJ+PllFC0A/--