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=-7.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 207B1C433B4 for ; Wed, 31 Mar 2021 21:53:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D38DC61075 for ; Wed, 31 Mar 2021 21:53:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231347AbhCaVwx (ORCPT ); Wed, 31 Mar 2021 17:52:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231579AbhCaVwU (ORCPT ); Wed, 31 Mar 2021 17:52:20 -0400 Received: from mail-qk1-x735.google.com (mail-qk1-x735.google.com [IPv6:2607:f8b0:4864:20::735]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43109C061574; Wed, 31 Mar 2021 14:52:20 -0700 (PDT) Received: by mail-qk1-x735.google.com with SMTP id o5so389615qkb.0; Wed, 31 Mar 2021 14:52:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=iVgFfy9Gk4TopgDWAZb3OEMFsekIXo3QttoRKgThI1I=; b=LlC/3vOcZu0Rh5837wBCMc/jMQBLoS5tu19QTNj1eof7IhHTCSrowwreYpcEeTbT5X NlWLfUqhbD9HhkHO9DsT4Tyx2dRlg91X71xYeCMm7fKtrUmafIBq7/LrPrNoupfhFp3m GewFfvppFWbs9VRkNf6T/omLtxmxV/Um2gbRVOo+AHZwOoh9mGFiVd9+oTJRsbPr+urV 9+SzjFJBATN+dQCPHnqvB4BC59ngCo/QcWw7P40soldfgVxjJkBfgZEWDD018mop0vXZ RHFwc/5vTY5r72yfm8jOOOnGx6oz9cJw+eVDnJnP827bZO8OihlinIME1rTQWHzKsxKK ckUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=iVgFfy9Gk4TopgDWAZb3OEMFsekIXo3QttoRKgThI1I=; b=agDMhbaDAHhjurNo28A9Y1aV0ZC/Zyt/xhO3l+yk31Vamck4ce7KHRm/vpbK+iLv7d Wy6a9M6RF+Uhduu77L93Ar3mhuT2m+2/OdcydyCeDcIsBllYc8CVFLlxQJ74lNd0Qt/W ZZ4PRKhthAZ4aCENq1pGyu/517QKZvod6UwcUnCWfDwHUaAIE6jOz52ffkQ+wN0yrt5Q p6dJPbYNBGC5aoHTk3zyKj9y9AIzI+z3m2jwlnIiWC7PHCJqVIKiyH1tnDmp3vzxzGfv xQIBg/aGjzEwZYTBKih505nmNuF7iTi45Io5/Y67q2ZdVAEP2dS0f9Bp9gu6aLkR98Ld lWfQ== X-Gm-Message-State: AOAM533G4wIwFMIZpqZKQPjpNwq5k6JnUGs59f8qpN6bU0TE+I+fvTdK ZD3YHFrVtp7CHOPDD0Q6OzU= X-Google-Smtp-Source: ABdhPJwK1AgyeLn7/B6+lfbSP03Q/ohuFDGUVnzdZCNHOlmGfkjpcbj+5GbXHWQQi4iDLVthXpiBHg== X-Received: by 2002:a37:78b:: with SMTP id 133mr5361746qkh.109.1617227539232; Wed, 31 Mar 2021 14:52:19 -0700 (PDT) Received: from localhost ([207.98.216.60]) by smtp.gmail.com with ESMTPSA id d84sm2453310qke.53.2021.03.31.14.52.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Mar 2021 14:52:18 -0700 (PDT) Date: Wed, 31 Mar 2021 14:52:18 -0700 From: Yury Norov To: Mike Rapoport Cc: 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" , Ingo Molnar , James Bottomley , "Kirill A. Shutemov" , Matthew Wilcox , Matthew Garrett , Mark Rutland , Michal Hocko , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "Rafael J. Wysocki" , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , 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-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org Subject: Re: [PATCH] memfd_secret: use unsigned int rather than long as syscall flags type Message-ID: <20210331215218.GA3437@yury-ThinkPad> References: <20210331142345.27532-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210331142345.27532-1-rppt@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 31, 2021 at 05:23:45PM +0300, Mike Rapoport wrote: > From: Mike Rapoport > > Yuri Norov says: > > If parameter size is the same for native and compat ABIs, we may > wire a syscall made by compat client to native handler. This is > true for unsigned int, but not true for unsigned long or pointer. > > That's why I suggest using unsigned int and so avoid creating compat > entry point. > > Use unsigned int as the type of the flags parameter in memfd_secret() > system call. > > Signed-off-by: Mike Rapoport Acked-by: Yury Norov