From nobody Fri Oct 24 20:13:48 2025 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 88A57C00140 for ; Mon, 15 Aug 2022 23:49:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354635AbiHOXtB (ORCPT ); Mon, 15 Aug 2022 19:49:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354557AbiHOXm0 (ORCPT ); Mon, 15 Aug 2022 19:42:26 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5FBD248EBE; Mon, 15 Aug 2022 13:13:42 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7B385B80EAB; Mon, 15 Aug 2022 20:13:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8543C433C1; Mon, 15 Aug 2022 20:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660594419; bh=6aBMzaqoaG5/pDLHyavSbk3RURz9kTZQdE3pp1Q3vSk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O9tvYZ+B3Fzt3+SLHyGIX+is8o7NtN7Qc9DMujxwgS9VFmEDDx3S9/LMAy3OGIGuI yx8IBIg9PIstsg5g4YhK6X+Ts7B0Jqp3EtHONG944SubmVej3BNtzqF4fttLc7rc3u gAMOZLYNXS/+AsMGX0qcIwA45dW9gcADZefVl+lE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexander Gordeev Subject: [PATCH 5.18 1085/1095] Revert "s390/smp: enforce lowcore protection on CPU restart" Date: Mon, 15 Aug 2022 20:08:04 +0200 Message-Id: <20220815180513.931633763@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Alexander Gordeev commit 953503751a426413ea8aee2299ae3ee971b70d9b upstream. This reverts commit 6f5c672d17f583b081e283927f5040f726c54598. This breaks normal crash dump when CPU0 is offline. Signed-off-by: Alexander Gordeev Signed-off-by: Greg Kroah-Hartman --- arch/s390/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -508,8 +508,8 @@ static void __init setup_lowcore_dat_on( S390_lowcore.svc_new_psw.mask |=3D PSW_MASK_DAT; S390_lowcore.program_new_psw.mask |=3D PSW_MASK_DAT; S390_lowcore.io_new_psw.mask |=3D PSW_MASK_DAT; - __ctl_set_bit(0, 28); __ctl_store(S390_lowcore.cregs_save_area, 0, 15); + __ctl_set_bit(0, 28); put_abs_lowcore(restart_flags, RESTART_FLAG_CTLREGS); put_abs_lowcore(program_new_psw, lc->program_new_psw); for (cr =3D 0; cr < ARRAY_SIZE(lc->cregs_save_area); cr++)