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=-9.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 9988CC433E9 for ; Tue, 9 Mar 2021 14:55:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 57DFE6525F for ; Tue, 9 Mar 2021 14:55:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230227AbhCIOys (ORCPT ); Tue, 9 Mar 2021 09:54:48 -0500 Received: from conssluserg-06.nifty.com ([210.131.2.91]:27039 "EHLO conssluserg-06.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231732AbhCIOyX (ORCPT ); Tue, 9 Mar 2021 09:54:23 -0500 Received: from mail-pf1-f171.google.com (mail-pf1-f171.google.com [209.85.210.171]) (authenticated) by conssluserg-06.nifty.com with ESMTP id 129ErwVA022937 for ; Tue, 9 Mar 2021 23:53:59 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-06.nifty.com 129ErwVA022937 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1615301639; bh=9dbxmmCJGIIcZtYkRaA26NTON8amq3oSId7Jc5fjq4k=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=d1H+YIWJuaC4U8hgqez+zfnpFHK9q7e251hhGcd6qhJPC15YvORcG+aSzfx0Z0WfA LW0K6vg18es8jKnrXZ2sDL0DD7amIITsRFsmfXFyUlw+LiEVwyR4G1LfzlwkuHF6Sf cdePbBKqjWnxQKDGz5KqTTeLTbb8niXVGU2eyki60hMwwV8xNpUjo/sdlx2NFTg2Tj EKF1NTEtfaE59vrxlGHdE7toRkAbj0i+9K0kf2cGnzwiDflH1ND6/d9R1qS/wsGDa0 JJGPenYXLCZjm88gaU1BbUfYxrgUAHHP97tGZNfIJk1D7xQ9rodxXRJ6PKseLY4/JN meTjE9wSQGPiQ== X-Nifty-SrcIP: [209.85.210.171] Received: by mail-pf1-f171.google.com with SMTP id a188so9640722pfb.4 for ; Tue, 09 Mar 2021 06:53:58 -0800 (PST) X-Gm-Message-State: AOAM533TFFpOtgQWkxxMZjTscNZuRz5p2T/KZ9YbiGbahJ8z4Fi+hhI9 BoJjIvR7pqxmHD8L3M+gULBAgrtUq9lIoebXqZo= X-Google-Smtp-Source: ABdhPJw7fnUA542cPIjJRyzOi8rbyugp7wC2kou7h9Q/JGVx4YTVqkaBMgURTjnjT/c6z2lC6HGVVRAFHyVWYthHLu8= X-Received: by 2002:a65:41c6:: with SMTP id b6mr24925857pgq.7.1615301638088; Tue, 09 Mar 2021 06:53:58 -0800 (PST) MIME-Version: 1.0 References: <20210309123544.14040-1-msuchanek@suse.de> <20210309133523.GX6564@kitsune.suse.cz> In-Reply-To: <20210309133523.GX6564@kitsune.suse.cz> From: Masahiro Yamada Date: Tue, 9 Mar 2021 23:53:21 +0900 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] arm64: make STACKPROTECTOR_PER_TASK configurable. To: =?UTF-8?Q?Michal_Such=C3=A1nek?= Cc: linux-arm-kernel , Catalin Marinas , Will Deacon , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 9, 2021 at 10:35 PM Michal Such=C3=A1nek wr= ote: > > On Tue, Mar 09, 2021 at 10:22:36PM +0900, Masahiro Yamada wrote: > > On Tue, Mar 9, 2021 at 9:35 PM Michal Suchanek wrot= e: > > > > > > When using dummy-tools STACKPROTECTOR_PER_TASK is unconditionally > > > selected. This defeats the purpose of the all-enabled tool. > > > > > > Description copied from arm > > > > > > Cc: Masahiro Yamada > > > Signed-off-by: Michal Suchanek > > > > > > Could you explain what problem > > this patch is trying to solve? > > The option cannot be disabled when compiler has the required capability. Yes. Currently, this symbol claims "def_bool y", so there is no way to disable it. But, it comes from the nature of Kconfig in general. dummy-tools is completely unrelated here. --=20 Best Regards Masahiro Yamada 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=-9.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham 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 5917EC433E0 for ; Tue, 9 Mar 2021 14:56:39 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 CA01064F56 for ; Tue, 9 Mar 2021 14:56:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CA01064F56 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Cc:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Y4Hfzie558jquXGm+wSrmhpFTpcI3Hum2bUF4R/7yU8=; b=I+dLo8xZuN8utyibN1eKr1qo8 n5x8ekbNyW4a5fhYu4UXuVaH/mkMPjw+X6EQM5rCoy1rDscs/TsotBy5ZM1byQOY2eRksGQzhSkIq UFdkwJHmOvezKWDVJ3UmHp1ANpU2pfaV2Z9ZmUfl1Qb39KLNo2xabtevwp54N8kDsKH2MfY0jsn8k soihomPgHZi4NdfXQzV2iNN9pcMxTJcKH5lcEV84GjmW1Hc+qIgiFn+UxklGd2FlUbunTyqqRmIYV GelW4S/g0XseTQ3TcgxiMLcsOmrYsGOMDh1iWCi61O1T1udwZEbGYV6pP2VXnlS/mk+KekCWM24vu 2MK4jA48g==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lJdkp-004tPC-AD; Tue, 09 Mar 2021 14:54:35 +0000 Received: from conssluserg-06.nifty.com ([210.131.2.91]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lJdkf-004tMd-Pp for linux-arm-kernel@lists.infradead.org; Tue, 09 Mar 2021 14:54:30 +0000 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (authenticated) by conssluserg-06.nifty.com with ESMTP id 129Erwxe022938 for ; Tue, 9 Mar 2021 23:53:59 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-06.nifty.com 129Erwxe022938 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1615301639; bh=9dbxmmCJGIIcZtYkRaA26NTON8amq3oSId7Jc5fjq4k=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=d1H+YIWJuaC4U8hgqez+zfnpFHK9q7e251hhGcd6qhJPC15YvORcG+aSzfx0Z0WfA LW0K6vg18es8jKnrXZ2sDL0DD7amIITsRFsmfXFyUlw+LiEVwyR4G1LfzlwkuHF6Sf cdePbBKqjWnxQKDGz5KqTTeLTbb8niXVGU2eyki60hMwwV8xNpUjo/sdlx2NFTg2Tj EKF1NTEtfaE59vrxlGHdE7toRkAbj0i+9K0kf2cGnzwiDflH1ND6/d9R1qS/wsGDa0 JJGPenYXLCZjm88gaU1BbUfYxrgUAHHP97tGZNfIJk1D7xQ9rodxXRJ6PKseLY4/JN meTjE9wSQGPiQ== X-Nifty-SrcIP: [209.85.210.182] Received: by mail-pf1-f182.google.com with SMTP id y67so9682714pfb.2 for ; Tue, 09 Mar 2021 06:53:58 -0800 (PST) X-Gm-Message-State: AOAM531yDG7FFPhF3wuKCTrboZ8DWpcfJB+8zHI5oGIR2E1ldD8rgLFX PMJAM0rjSH1OmHiVkA+kQzs2TVLEHZWBmmv6rq8= X-Google-Smtp-Source: ABdhPJw7fnUA542cPIjJRyzOi8rbyugp7wC2kou7h9Q/JGVx4YTVqkaBMgURTjnjT/c6z2lC6HGVVRAFHyVWYthHLu8= X-Received: by 2002:a65:41c6:: with SMTP id b6mr24925857pgq.7.1615301638088; Tue, 09 Mar 2021 06:53:58 -0800 (PST) MIME-Version: 1.0 References: <20210309123544.14040-1-msuchanek@suse.de> <20210309133523.GX6564@kitsune.suse.cz> In-Reply-To: <20210309133523.GX6564@kitsune.suse.cz> From: Masahiro Yamada Date: Tue, 9 Mar 2021 23:53:21 +0900 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] arm64: make STACKPROTECTOR_PER_TASK configurable. To: =?UTF-8?Q?Michal_Such=C3=A1nek?= Cc: linux-arm-kernel , Catalin Marinas , Will Deacon , Linux Kernel Mailing List X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210309_145426_705126_897A8D0C X-CRM114-Status: GOOD ( 14.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVHVlLCBNYXIgOSwgMjAyMSBhdCAxMDozNSBQTSBNaWNoYWwgU3VjaMOhbmVrIDxtc3VjaGFu ZWtAc3VzZS5kZT4gd3JvdGU6Cj4KPiBPbiBUdWUsIE1hciAwOSwgMjAyMSBhdCAxMDoyMjozNlBN ICswOTAwLCBNYXNhaGlybyBZYW1hZGEgd3JvdGU6Cj4gPiBPbiBUdWUsIE1hciA5LCAyMDIxIGF0 IDk6MzUgUE0gTWljaGFsIFN1Y2hhbmVrIDxtc3VjaGFuZWtAc3VzZS5kZT4gd3JvdGU6Cj4gPiA+ Cj4gPiA+IFdoZW4gdXNpbmcgZHVtbXktdG9vbHMgU1RBQ0tQUk9URUNUT1JfUEVSX1RBU0sgaXMg dW5jb25kaXRpb25hbGx5Cj4gPiA+IHNlbGVjdGVkLiBUaGlzIGRlZmVhdHMgdGhlIHB1cnBvc2Ug b2YgdGhlIGFsbC1lbmFibGVkIHRvb2wuCj4gPiA+Cj4gPiA+IERlc2NyaXB0aW9uIGNvcGllZCBm cm9tIGFybQo+ID4gPgo+ID4gPiBDYzogTWFzYWhpcm8gWWFtYWRhIDxtYXNhaGlyb3lAa2VybmVs Lm9yZz4KPiA+ID4gU2lnbmVkLW9mZi1ieTogTWljaGFsIFN1Y2hhbmVrIDxtc3VjaGFuZWtAc3Vz ZS5kZT4KPiA+Cj4gPgo+ID4gQ291bGQgeW91IGV4cGxhaW4gd2hhdCBwcm9ibGVtCj4gPiB0aGlz IHBhdGNoIGlzIHRyeWluZyB0byBzb2x2ZT8KPgo+IFRoZSBvcHRpb24gY2Fubm90IGJlIGRpc2Fi bGVkIHdoZW4gY29tcGlsZXIgaGFzIHRoZSByZXF1aXJlZCBjYXBhYmlsaXR5LgoKClllcy4KQ3Vy cmVudGx5LCB0aGlzIHN5bWJvbCBjbGFpbXMgImRlZl9ib29sIHkiLApzbyB0aGVyZSBpcyBubyB3 YXkgdG8gZGlzYWJsZSBpdC4KCkJ1dCwgaXQgY29tZXMgZnJvbSB0aGUgbmF0dXJlIG9mIEtjb25m aWcgaW4gZ2VuZXJhbC4KCmR1bW15LXRvb2xzIGlzIGNvbXBsZXRlbHkgdW5yZWxhdGVkIGhlcmUu CgoKCgoKCgotLSAKQmVzdCBSZWdhcmRzCk1hc2FoaXJvIFlhbWFkYQoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5n IGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5p bmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=