Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp1626762pxj; Wed, 19 May 2021 10:05:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwfiCll5AVaZ2QBLCnqa8i9ksd67WbviQVfn2NWmY7g2wGhxYIsWvzLkX+MUktfpohSFIk9 X-Received: by 2002:a17:906:857:: with SMTP id f23mr204501ejd.64.1621443940311; Wed, 19 May 2021 10:05:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1621443940; cv=none; d=google.com; s=arc-20160816; b=bqvX3oMFybwv2tobK4aur0Y8/HwIplp46/UnRVO9kGr0PXBZvq/rVRL5OFrBbImgtW lugoSC1bGLE9TBnuUV/tMiet7q8bxDPrfEvEtbSpjA+oLeX5R23VA3VkvJCODszpPL2u rFFz1yAJsCmv3FTF0tWowREXDjwRR9Mv4WOnYieeC29OOU48rGshc4WppcWvCUhR1cRG 00aAz4ApDeYurbVaEp40L5mq2Vu3PydHpvZ9ygDJDgEz2lEiizgNfVD+kgwrmp4fiSqA 6HlQK/eRIVZl/tV/DTO8O2K5GsTlJQJQjHisqcwZk31mL22cFWZt8kYXONvvGCcdr1nO fKaA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=hr8yy65CZMhxPqYCENyKEMKN/TL8aFCCTIrZIkdGqbQ=; b=fFikdhm4UsriaZ7JI8D5pKwOCSR1muJ30rxDRk5pqHYx779gE1yFRvQpHJWkiLnklK +FoeF3HpkwLMMsZL80esetaitJH4XD4e43p3PdpK5TBERG89xQGBCkc8Lf2KP6RplhlS /lG7QWgMUoPGFJEi4xVlLr/Rgr/pEvkZBB9YwZs5EsGljnvf6aO3QfPKmxKVB66dOf6r QuU9InU/DHvsO3gSWcMTUgG4TKH3rsQQuVeK15Hgt2jeaqPQM5KhThpd2m8xQTJkcHh/ b0ZiGVWRfiqCTJsJ9oEvxD+bsHDbb1aP4qo+nQJmgpvPWu/Chuh1zzFNoVymWQuHErmD yWdA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=kWsTjuP4; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id bt12si226849ejb.669.2021.05.19.10.05.16; Wed, 19 May 2021 10:05:40 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=kWsTjuP4; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347586AbhERIuZ (ORCPT + 99 others); Tue, 18 May 2021 04:50:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:58714 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347585AbhERIuX (ORCPT ); Tue, 18 May 2021 04:50:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5D9D56100A; Tue, 18 May 2021 08:49:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621327745; bh=9j086S06Khr9M+4Gb0l7IraBiUnmuGNVPHo84lmxyII=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kWsTjuP4DMrsfJl/E9IvAZlAVq1v4BR6l/VAFcDv4cZy1vSm0hw071yXD8NrBmDVg wqOW9sxrs5+myMw0Zi+0ORGjzkCvh3PTe9pTCjVVshS9vfrqHJhCbWuT0++f2KSaz2 u7Vx9EIQaG5RUh+YJTBfEuOu87yyvShwbuSA1WKByLJBKSMPLvJYg9vLC9CQXTZ4dZ I24REZx9yU7hnJAecQ/nNXYcHaKR+GTvKS6IE7PnYGGE8ci1pPKPXoAtgfmz97tt9C oXELz2A1rtKTnN3C3rZM+YlWeVW+C3EmL1CqLPuu32eJoQM1pTA801m3s0hyYsANfu TCmavkJ3t4S8w== Date: Tue, 18 May 2021 09:49:01 +0100 From: Will Deacon To: John Stultz Cc: Catalin Marinas , Kees Cook , Sami Tolvanen , linux-arm-kernel , Linux Kernel Mailing List , Bjorn Andersson , YongQin Liu , Amit Pundir Subject: Re: REGRESSION: kernel BUG at arch/arm64/kernel/alternative.c:157! Message-ID: <20210518084900.GA7412@willie-the-truck> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi John, On Mon, May 17, 2021 at 02:52:59PM -0700, John Stultz wrote: > With v5.13-rc2, I've been seeing an odd boot regression with the > DragonBoard 845c: > > Unfortunately, trying to bisect it down (v5.13-rc1 works ok) is giving > me inconsistent results so far. It feels a bit like maybe some config > option gets enabled moving forward, and then sticks around when we go > back. I'll take another swing at bisecting it later today, but I have > to move on to some other work right now, so I figured I'd share (with > folks who better know the recent __apply_alternatives changes) in case > folks have a better idea: Please can you try reverting af44068c581c and 0c6c2d3615ef? Thanks, Will