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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E759EC10F13 for ; Tue, 16 Apr 2019 15:00:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9CD520652 for ; Tue, 16 Apr 2019 15:00:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="eTXJw7zt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729888AbfDPPAS (ORCPT ); Tue, 16 Apr 2019 11:00:18 -0400 Received: from mout.gmx.net ([212.227.17.22]:53687 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729757AbfDPPAS (ORCPT ); Tue, 16 Apr 2019 11:00:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1555426816; bh=PV90ytEQcFN65YAF2nB/G8jZs59RHJ+6SDjL/+Qu5TY=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=eTXJw7ztKCEZEFYmSQGmZ36vjU6Q0netk7HbUjpBf2Zf3JoD2twcLSHer0MEF0X36 PyzSRaC66o0yBCfMm/UOJVjiUjE3m9agMCs/Wowo0gWFdZu7R1s/mq+FZ57OYJFvE9 Zda2adY+zLvrQ1eMWO9oOUvg/gNlt7lbOh4TnC6I= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.20.60] ([92.116.178.48]) by mail.gmx.com (mrgmx103 [212.227.17.168]) with ESMTPSA (Nemesis) id 0LbMb0-1gayxG042U-00kyTp; Tue, 16 Apr 2019 17:00:16 +0200 Subject: Re: [PATCH 4.9 64/76] parisc: Detect QEMU earlier in boot process To: Greg Kroah-Hartman Cc: Linux Kernel Development , stable@vger.kernel.org References: <20190415183707.712011689@linuxfoundation.org> <20190415183726.478117691@linuxfoundation.org> <20190416142350.GB31920@kroah.com> From: Helge Deller Openpgp: preference=signencrypt Autocrypt: addr=deller@gmx.de; keydata= xsBNBFDPIPYBCAC6PdtagIE06GASPWQJtfXiIzvpBaaNbAGgmd3Iv7x+3g039EV7/zJ1do/a y9jNEDn29j0/jyd0A9zMzWEmNO4JRwkMd5Z0h6APvlm2D8XhI94r/8stwroXOQ8yBpBcP0yX +sqRm2UXgoYWL0KEGbL4XwzpDCCapt+kmarND12oFj30M1xhTjuFe0hkhyNHkLe8g6MC0xNg KW3x7B74Rk829TTAtj03KP7oA+dqsp5hPlt/hZO0Lr0kSAxf3kxtaNA7+Z0LLiBqZ1nUerBh OdiCasCF82vQ4/y8rUaKotXqdhGwD76YZry9AQ9p6ccqKaYEzWis078Wsj7p0UtHoYDbABEB AAHNHEhlbGdlIERlbGxlciA8ZGVsbGVyQGdteC5kZT7CwJIEEwECADwCGwMGCwkIBwMCBhUI AgkKCwQWAgMBAh4BAheAFiEE9M/0wAvkPPtRU6Boh8nBUbUeOGQFAlrHzIICGQEACgkQh8nB UbUeOGT1GAgAt+EeoHB4DbAx+pZoGbBYp6ZY8L6211n8fSi7wiwgM5VppucJ+C+wILoPkqiU +ZHKlcWRbttER2oBUvKOt0+yDfAGcoZwHS0P+iO3HtxR81h3bosOCwek+TofDXl+TH/WSQJa iaitof6iiPZLygzUmmW+aLSSeIAHBunpBetRpFiep1e5zujCglKagsW78Pq0DnzbWugGe26A 288JcK2W939bT1lZc22D9NhXXRHfX2QdDdrCQY7UsI6g/dAm1d2ldeFlGleqPMdaaQMcv5+E vDOur20qjTlenjnR/TFm9tA1zV+K7ePh+JfwKc6BSbELK4EHv8J8WQJjfTphakYLVM7ATQRQ zyD2AQgA2SJJapaLvCKdz83MHiTMbyk8yj2AHsuuXdmB30LzEQXjT3JEqj1mpvcEjXrX1B3h +0nLUHPI2Q4XWRazrzsseNMGYqfVIhLsK6zT3URPkEAp7R1JxoSiLoh4qOBdJH6AJHex4CWu UaSXX5HLqxKl1sq1tO8rq2+hFxY63zbWINvgT0FUEME27Uik9A5t8l9/dmF0CdxKdmrOvGMw T770cTt76xUryzM3fAyjtOEVEglkFtVQNM/BN/dnq4jDE5fikLLs8eaJwsWG9k9wQUMtmLpL gRXeFPRRK+IT48xuG8rK0g2NOD8aW5ThTkF4apznZe74M7OWr/VbuZbYW443QQARAQABwsBf BBgBAgAJBQJQzyD2AhsMAAoJEIfJwVG1HjhkNTgH/idWz2WjLE8DvTi7LvfybzvnXyx6rWUs 91tXUdCzLuOtjqWVsqBtSaZynfhAjlbqRlrFZQ8i8jRyJY1IwqgvHP6PO9s+rIxKlfFQtqhl kR1KUdhNGtiI90sTpi4aeXVsOyG3572KV3dKeFe47ALU6xE5ZL5U2LGhgQkbjr44I3EhPWc/ lJ/MgLOPkfIUgjRXt0ZcZEN6pAMPU95+u1N52hmqAOQZvyoyUOJFH1siBMAFRbhgWyv+YE2Y ZkAyVDL2WxAedQgD/YCCJ+16yXlGYGNAKlvp07SimS6vBEIXk/3h5Vq4Hwgg0Z8+FRGtYZyD KrhlU0uMP9QTB5WAUvxvGy8= Message-ID: Date: Tue, 16 Apr 2019 17:00:15 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190416142350.GB31920@kroah.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:YTRsTxy+NNMDf4Xg+YifHe7oKavivD+a/QqKxdFbrVMQgIVfnWv UfC0Gk+o1bshsPcMd/vtK3goqf+2UYDQ6m9k/fwkMOyNtQDYELXBno8cWJZO+u7UsGsVvaq 4rs2BLZC+5Tqe7KJxqs8gQZ3+GJ6h4KH1G9YrxFiGObl1gnCzzvTogJAD7SY6/tkorLyVuD 2Eg5GAyvTV4OUItFGYu1A== X-UI-Out-Filterresults: notjunk:1;V03:K0:i7Qh4hPZzCQ=:yR4aJSW9JYQ/j6L4VmauAg /weDGIyT3Y5LaamPTKMWVwM19VqrTSYIPM2H5dixGdyYfJrcjnbKPKqfmBa50XRgY02tPo7w5 yT5uatNaGoOWggnQONcBMxavKYLCq7Y1qO1/g7Wt1EqhBYuV+j498tNdlm9IHdK+7A83tRwJM GsK80eeGFoUyG455B15BBYqRJBn44PBwIgdgtgjPPiteYfDMQMNq9Xs3ia9M8+aq3GSMO5sSn nikY0p9dnIECEoMYtlo/941XnEZ3WNcHPU3fddwC8ElqEDL6vHDxElbpS6KdljupwbNftcwhb bRqM0Y/HPBoexgM1oCht8F5eVUsW+av8EYorKRJQPKtFmOCVcv+/jPGXQhUHcPWS401TxvEzU 80KdEaezPRlJTEoaWpk2MUjtng4HBm3dAtNeMoqnfqXhMm+BDwptfQNpemcS76kP40nPFIhba 3vHhLjnRxpUiIUmcBmPYyBeZLK++Riuvrf5gcH9dptnADRthGg+CgDPLjX0GSa/Xr1iZFg4cc MO/kQ327r4/FFhVlqfXqhTt+a2Lo66y9Brw5AGVb6EjJS1uhpypoR9AkM0WO3/g2JBEQ4UDW7 tf7TYBo63atEE179TzHl6NJXIi1bjoDHSFkgsGwsNnzJIUH0ObchLbtLTB3DETlVeSNKUfZY/ qzT2FmrmF/esau3wQ2x6M4GC+uSTBL8sNFhltW3IBTv70HwWfSJq3zedDQJ2p2fR7lkY+IuPd TF+H0HfrOmCRIrQUFOV/ypcZ8Y+asCvTzTNkAv27KkH1193YDtipD+M1vq6so+vyxxEQeWcNr DKZtrW7hB7cORzGp46FjbUFAfRSzSp8nqDLEdc3NA9oLwhg3iSo8Rckh9N72YW13DI1W4M/JQ 9bPA1H6Y2uNfy5Q1TVJmj0uA9Ir2CX6CpySH2jwK8m15hpuYPG4DsohagOBZCJUTowtKwt3n9 9+KDlufzkbyOt9v75opQPySyGsdAVpn9WfKHBHsXydjCbIM4acgPqNLdI2oNT4ttPuJkvWdaE sVxAhkbivNuOBOFSUjPke3M= Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 16.04.19 16:23, Greg Kroah-Hartman wrote: > On Tue, Apr 16, 2019 at 03:50:16PM +0200, Helge Deller wrote: >> Hi Greg, >> >> please do NOT apply this patch to the 4.9 tree. >> See below, it was tagged for v4.14+ only. > > Yes, but I added it to 4.9 because: Ah, ok. >>> commit d006e95b5561f708d0385e9677ffe2c46f2ae345 upstream. >>> >>> While adding LASI support to QEMU, I noticed that the QEMU detection i= n >>> the kernel happens much too late. For example, when a LASI chip is fou= nd >>> by the kernel, it registers the LASI LED driver as well. But when we >>> run on QEMU it makes sense to avoid spending unnecessary CPU cycles, s= o >>> we need to access the running_on_QEMU flag earlier than before. >>> >>> This patch now makes the QEMU detection the fist task of the Linux >>> kernel by moving it to where the kernel enters the C-coding. >>> >>> Fixes: 310d82784fb4 ("parisc: qemu idle sleep support") > > This commit is in 4.9.76. So why wouldn't it be valid in 4.9.y (with > the exception of the fact that it doesn't build...)? In my opinion it was not a critical-enough patch to ask for backporting th= is and the other depend patch. Idle-sleep does work without this patch, it's just upcoming qemu-support wich will not run optimal (but does work). That said, of course it would be nice to get that backported in 4.9. I *think* if you pull in 5ffa8518851f1401817c15d2a7eecc0373c26ff9 too, it should be ok and fix the build issue. Helge