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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C07EDC433F5 for ; Tue, 24 May 2022 13:25:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235573AbiEXNZb (ORCPT ); Tue, 24 May 2022 09:25:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231909AbiEXNZa (ORCPT ); Tue, 24 May 2022 09:25:30 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 92DA11E3D9 for ; Tue, 24 May 2022 06:25:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653398728; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=WRalF4zWVj1tISZdAUWBK9vEkcpOHgCzCW6oPb97yEQ=; b=Cfm/GtRSOQMRsaMYhwliZyn6QQ+JpzmrAKWS0mHyYdeKQbVQ5z4NL3ZPkj6j38lenREU+Z IK9pRuO7AI1nTFmQp0lZm/6uEgsT5atSNInT36RgqdJkUhDs2V66bjTGU2W6ynJRCAYUWq Z24vKYuVzC6vKpaMxPT6W3LZQXJZL/E= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-518-Acjyq1HoOjqTtQAmsjV9pg-1; Tue, 24 May 2022 09:25:23 -0400 X-MC-Unique: Acjyq1HoOjqTtQAmsjV9pg-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0F6161C05152; Tue, 24 May 2022 13:25:22 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.40.195.109]) by smtp.corp.redhat.com (Postfix) with SMTP id 56805492CA2; Tue, 24 May 2022 13:25:02 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Tue, 24 May 2022 15:25:21 +0200 (CEST) Date: Tue, 24 May 2022 15:25:01 +0200 From: Oleg Nesterov To: "Eric W. Biederman" Cc: linux-kernel@vger.kernel.org, rjw@rjwysocki.net, mingo@kernel.org, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, mgorman@suse.de, bigeasy@linutronix.de, Will Deacon , tj@kernel.org, linux-pm@vger.kernel.org, Peter Zijlstra , Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org, Kees Cook , Jann Horn , linux-ia64@vger.kernel.org, Robert OCallahan , Kyle Huey , Richard Henderson , Ivan Kokshaysky , Matt Turner , Jason Wessel , Daniel Thompson , Douglas Anderson , Douglas Miller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras Subject: Re: [PATCH 06/16] ptrace: Remove unnecessary locking in ptrace_(get|set)siginfo Message-ID: <20220524132500.GC14347@redhat.com> References: <871qwq5ucx.fsf_-_@email.froward.int.ebiederm.org> <20220518225355.784371-6-ebiederm@xmission.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220518225355.784371-6-ebiederm@xmission.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On 05/18, Eric W. Biederman wrote: > > Since commit 9899d11f6544 ("ptrace: ensure arch_ptrace/ptrace_request > can never race with SIGKILL") it has been unnecessary for > ptrace_getsiginfo and ptrace_setsiginfo to use lock_task_sighand. ACK