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 376F1C433F5 for ; Wed, 8 Dec 2021 20:26:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240320AbhLHUa0 (ORCPT ); Wed, 8 Dec 2021 15:30:26 -0500 Received: from out03.mta.xmission.com ([166.70.13.233]:36988 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240290AbhLHUaR (ORCPT ); Wed, 8 Dec 2021 15:30:17 -0500 Received: from in02.mta.xmission.com ([166.70.13.52]:44904) by out03.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mv3WW-004DD5-97; Wed, 08 Dec 2021 13:26:44 -0700 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95]:39446 helo=localhost.localdomain) by in02.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mv3WU-00CjR6-Sr; Wed, 08 Dec 2021 13:26:43 -0700 From: "Eric W. Biederman" To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, Linus Torvalds , Alexey Gladkov , Kyle Huey , Oleg Nesterov , Kees Cook , Al Viro , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Martin Schwidefsky , "Eric W. Biederman" Date: Wed, 8 Dec 2021 14:25:32 -0600 Message-Id: <20211208202532.16409-10-ebiederm@xmission.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <87a6ha4zsd.fsf@email.froward.int.ebiederm.org> References: <87a6ha4zsd.fsf@email.froward.int.ebiederm.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-XM-SPF: eid=1mv3WU-00CjR6-Sr;;;mid=<20211208202532.16409-10-ebiederm@xmission.com>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX19UJIRM3fakm3QCfFZtxnTkDumBrYlYS6s= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: [PATCH 10/10] exit/kthread: Move the exit code for kernel threads into struct kthread X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The exit code of kernel threads has different semantics than the exit_code of userspace tasks. To avoid confusion and allow the userspace implementation to change as needed move the kernel thread exit code into struct kthread. Signed-off-by: "Eric W. Biederman" --- kernel/kthread.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/kthread.c b/kernel/kthread.c index 8e5f44bed027..9c6c532047c4 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -52,6 +52,7 @@ struct kthread_create_info struct kthread { unsigned long flags; unsigned int cpu; + int result; int (*threadfn)(void *); void *data; mm_segment_t oldfs; @@ -287,7 +288,9 @@ EXPORT_SYMBOL_GPL(kthread_parkme); */ void __noreturn kthread_exit(long result) { - do_exit(result); + struct kthread *kthread = to_kthread(current); + kthread->result = result; + do_exit(0); } /** @@ -679,7 +682,7 @@ int kthread_stop(struct task_struct *k) kthread_unpark(k); wake_up_process(k); wait_for_completion(&kthread->exited); - ret = k->exit_code; + ret = kthread->result; put_task_struct(k); trace_sched_kthread_stop_ret(ret); -- 2.29.2