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=-7.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 478A2C433E2 for ; Fri, 4 Sep 2020 04:43:56 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A0E49206CA for ; Fri, 4 Sep 2020 04:43:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0E49206CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4BjQ6v39QpzDqtY for ; Fri, 4 Sep 2020 14:43:51 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=ftp.linux.org.uk (client-ip=2002:c35c:fd02::1; helo=zeniv.linux.org.uk; envelope-from=viro@ftp.linux.org.uk; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Received: from ZenIV.linux.org.uk (zeniv.linux.org.uk [IPv6:2002:c35c:fd02::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4BjQ4c2sGYzDrDZ for ; Fri, 4 Sep 2020 14:41:52 +1000 (AEST) Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE3Xe-00AAXp-Va; Fri, 04 Sep 2020 04:41:39 +0000 Date: Fri, 4 Sep 2020 05:41:38 +0100 From: Al Viro To: Christoph Hellwig Subject: Re: [PATCH 12/14] x86: remove address space overrides using set_fs() Message-ID: <20200904044138.GP1236603@ZenIV.linux.org.uk> References: <20200903142242.925828-1-hch@lst.de> <20200903142242.925828-13-hch@lst.de> <20200904025510.GO1236603@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200904025510.GO1236603@ZenIV.linux.org.uk> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Kees Cook , x86@kernel.org, linux-kernel@vger.kernel.org, Luis Chamberlain , linux-fsdevel@vger.kernel.org, Linus Torvalds , Alexey Dobriyan Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Sep 04, 2020 at 03:55:10AM +0100, Al Viro wrote: > On Thu, Sep 03, 2020 at 04:22:40PM +0200, Christoph Hellwig wrote: > > > diff --git a/arch/x86/lib/getuser.S b/arch/x86/lib/getuser.S > > index c8a85b512796e1..94f7be4971ed04 100644 > > --- a/arch/x86/lib/getuser.S > > +++ b/arch/x86/lib/getuser.S > > @@ -35,10 +35,19 @@ > > #include > > #include > > > > +#ifdef CONFIG_X86_5LEVEL > > +#define LOAD_TASK_SIZE_MINUS_N(n) \ > > + ALTERNATIVE "mov $((1 << 47) - 4096 - (n)),%rdx", \ > > + "mov $((1 << 56) - 4096 - (n)),%rdx", X86_FEATURE_LA57 > > +#else > > +#define LOAD_TASK_SIZE_MINUS_N(n) \ > > + mov $(TASK_SIZE_MAX - (n)),%_ASM_DX > > +#endif > > Wait a sec... how is that supposed to build with X86_5LEVEL? Do you mean > > #define LOAD_TASK_SIZE_MINUS_N(n) \ > ALTERNATIVE __stringify(mov $((1 << 47) - 4096 - (n)),%rdx), \ > __stringify(mov $((1 << 56) - 4096 - (n)),%rdx), X86_FEATURE_LA57 > > there? Pushed out with the following folded in. diff --git a/arch/x86/lib/getuser.S b/arch/x86/lib/getuser.S index 94f7be4971ed..2f052bc96866 100644 --- a/arch/x86/lib/getuser.S +++ b/arch/x86/lib/getuser.S @@ -37,8 +37,8 @@ #ifdef CONFIG_X86_5LEVEL #define LOAD_TASK_SIZE_MINUS_N(n) \ - ALTERNATIVE "mov $((1 << 47) - 4096 - (n)),%rdx", \ - "mov $((1 << 56) - 4096 - (n)),%rdx", X86_FEATURE_LA57 + ALTERNATIVE __stringify(mov $((1 << 47) - 4096 - (n)),%rdx), \ + __stringify(mov $((1 << 56) - 4096 - (n)),%rdx), X86_FEATURE_LA57 #else #define LOAD_TASK_SIZE_MINUS_N(n) \ mov $(TASK_SIZE_MAX - (n)),%_ASM_DX diff --git a/arch/x86/lib/putuser.S b/arch/x86/lib/putuser.S index 445374885153..358239d77dff 100644 --- a/arch/x86/lib/putuser.S +++ b/arch/x86/lib/putuser.S @@ -33,8 +33,8 @@ #ifdef CONFIG_X86_5LEVEL #define LOAD_TASK_SIZE_MINUS_N(n) \ - ALTERNATIVE "mov $((1 << 47) - 4096 - (n)),%rbx", \ - "mov $((1 << 56) - 4096 - (n)),%rbx", X86_FEATURE_LA57 + ALTERNATIVE __stringify(mov $((1 << 47) - 4096 - (n)),%rbx), \ + __stringify(mov $((1 << 56) - 4096 - (n)),%rbx), X86_FEATURE_LA57 #else #define LOAD_TASK_SIZE_MINUS_N(n) \ mov $(TASK_SIZE_MAX - (n)),%_ASM_BX