Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp5401513ybi; Wed, 12 Jun 2019 01:47:19 -0700 (PDT) X-Google-Smtp-Source: APXvYqwc9Jav4lUVyK/nbqZrMSxD9NQqeLh/73nT4Y9Y/UH3KcvB8ogfnLYBy1ti4FTn9X3CYA24 X-Received: by 2002:a65:6096:: with SMTP id t22mr23768154pgu.71.1560329239077; Wed, 12 Jun 2019 01:47:19 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560329239; cv=none; d=google.com; s=arc-20160816; b=JKxea9yG1UQdL8ZCtRU8NRr18umCpLFcLtqFQGzPc91q7+rJnanWfYPlSp+bes36R7 ZA6qtDczVmWU0PJsRRvrgZeFHZtuLZvjHPNNuQG0Bl378RYSLR1Zq/d6dMDKAWjp/9bX 0wdaLfLJnvVoCz33CbeGQfA1wVfPtOXSc2v5R0DjNHhovsizf6X54yT8REQSki1LNXUp McFkqKvbf0cZIrHu32jNOBimVv+UBh2Hc1xDHn6bgLBSHjnKDiRWdePB097Nr44vCp6C rPOIaWM7Wy79Bo/D89uqBb8kyZnT/x+358jk8Cxwz/JbzoyGrQVBZmgW23NeLI5iZMxn HzcQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=NfLZt8ZaY4VYuqQfc7qsV1ppWAjyiA8yDlp2zxnUStw=; b=zS3MCkew758GGTr+d0DvN08xsB82nMiqOohj1tzdfTM5WsZUgat8L8/ybOy0ugm+cm kDezgaZX6DKnQ0lfV7U0MuWvuLVs9FmJpLGnpY4CpNbiKMl5TgC6yDRo2JYzjXUZzTBu Kq9YjLSvENwWlOq8/x1rQ+MK2rbhWc7VOJoAiEsPoxd7/CdMak3w2DrTYv3Hba89EMQ1 d3VlIHN+K4BPK7b9+rMDJjIaSUdnwHutmdQufBtduFiK2vriQXveHFFK+NgXSLm6SqdQ s9Hk+urs3bzVSbe5MADdizqNTgKBlg2elP1ao0jx04zCgyyJFx+7X9yp28DjHXbPTH05 QGXw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id r11si15166994plo.360.2019.06.12.01.47.03; Wed, 12 Jun 2019 01:47:19 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730613AbfFLIP2 (ORCPT + 99 others); Wed, 12 Jun 2019 04:15:28 -0400 Received: from mx2.suse.de ([195.135.220.15]:43438 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726406AbfFLIP2 (ORCPT ); Wed, 12 Jun 2019 04:15:28 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 4C91FAF21; Wed, 12 Jun 2019 08:15:27 +0000 (UTC) Date: Wed, 12 Jun 2019 10:15:26 +0200 From: Petr Mladek To: Miroslav Benes Cc: jpoimboe@redhat.com, jikos@kernel.org, joe.lawrence@redhat.com, kamalesh@linux.vnet.ibm.com, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 2/3] Revert "livepatch: Remove reliable stacktrace check in klp_try_switch_task()" Message-ID: <20190612081526.3d443z3lpw45vuhs@pathway.suse.cz> References: <20190611141320.25359-1-mbenes@suse.cz> <20190611141320.25359-3-mbenes@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190611141320.25359-3-mbenes@suse.cz> User-Agent: NeoMutt/20170912 (1.9.0) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2019-06-11 16:13:19, Miroslav Benes wrote: > This reverts commit 1d98a69e5cef3aeb68bcefab0e67e342d6bb4dad. Commit > 31adf2308f33 ("livepatch: Convert error about unsupported reliable > stacktrace into a warning") weakened the enforcement for architectures > to have reliable stack traces support. The system only warns now about > it. > > It only makes sense to reintroduce the compile time checking in > klp_try_switch_task() again and bail out early. > > Signed-off-by: Miroslav Benes Reviewed-by: Petr Mladek Best Regards, Petr