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 B0E1DC433EF for ; Mon, 25 Jul 2022 19:43:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234451AbiGYTnc (ORCPT ); Mon, 25 Jul 2022 15:43:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232013AbiGYTnb (ORCPT ); Mon, 25 Jul 2022 15:43:31 -0400 X-Greylist: delayed 558 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 25 Jul 2022 12:43:30 PDT Received: from raptorengineering.com (mail.raptorengineering.com [23.155.224.58]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 463FA140E1 for ; Mon, 25 Jul 2022 12:43:30 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.rptsys.com (Postfix) with ESMTP id E1E9237CDA30A2; Mon, 25 Jul 2022 14:34:11 -0500 (CDT) Received: from mail.rptsys.com ([127.0.0.1]) by localhost (vali.starlink.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id VnwW3Pumlutw; Mon, 25 Jul 2022 14:34:10 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by mail.rptsys.com (Postfix) with ESMTP id 657C637CDA309F; Mon, 25 Jul 2022 14:34:10 -0500 (CDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.rptsys.com 657C637CDA309F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raptorengineering.com; s=B8E824E6-0BE2-11E6-931D-288C65937AAD; t=1658777650; bh=C6eQ56WoqflhVshYvw4eSCbTOWmWQugcnRK1KwC4InQ=; h=Date:From:To:Message-ID:MIME-Version; b=HUXCmnoHrk+82zDVSN5TwrZtJv5I32HBsm1W/0ygtdInl+yif0P4tia7Sd5JAJRPU yulkymOoGGK7dA9UI8YmyA5VSuDRN1JJjoR3zzEIZDjsweTlVG5bWsddAOn3MbNmWo OfLJgjUHcP5wIl4ettt6QsLNsTiDjIz4SB4rD9wA= X-Virus-Scanned: amavisd-new at rptsys.com Received: from mail.rptsys.com ([127.0.0.1]) by localhost (vali.starlink.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id DNoUORfc-qsk; Mon, 25 Jul 2022 14:34:10 -0500 (CDT) Received: from vali.starlink.edu (localhost [127.0.0.1]) by mail.rptsys.com (Postfix) with ESMTP id 3BA9737CDA309C; Mon, 25 Jul 2022 14:34:10 -0500 (CDT) Date: Mon, 25 Jul 2022 14:34:08 -0500 (CDT) From: Timothy Pearson To: Linus Torvalds Cc: Michael Ellerman , linuxppc-dev , Alex Deucher , amd-gfx , linux@roeck-us.net, linux-kernel , Dan =?utf-8?Q?Hor=C3=A1k?= Message-ID: <1446417444.13111032.1658777648586.JavaMail.zimbra@raptorengineeringinc.com> In-Reply-To: References: <20220725123918.1903255-1-mpe@ellerman.id.au> Subject: Re: [PATCH] drm/amdgpu: Re-enable DCN for 64-bit powerpc MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailer: Zimbra 8.5.0_GA_3042 (ZimbraWebClient - GC103 (Linux)/8.5.0_GA_3042) Thread-Topic: drm/amdgpu: Re-enable DCN for 64-bit powerpc Thread-Index: bYJinp50nUzyW/1gBugq0G+Et27Ikw== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ----- Original Message ----- > From: "Linus Torvalds" > To: "Michael Ellerman" > Cc: "linuxppc-dev" , "Alex Deucher" , "amd-gfx" > , linux@roeck-us.net, "linux-kernel" , "Dan Hor=C3=A1k" > , "Timothy Pearson" > Sent: Monday, July 25, 2022 2:19:57 PM > Subject: Re: [PATCH] drm/amdgpu: Re-enable DCN for 64-bit powerpc > On Mon, Jul 25, 2022 at 5:39 AM Michael Ellerman wro= te: >> >> Further digging shows that the build failures only occur with compilers >> that default to 64-bit long double. >=20 > Where the heck do we have 'long double' things anywhere in the kernel? >=20 > I tried to grep for it, and failed miserably. I found some constants > that would qualify, but they were in the v4l colorspaces-details.rst > doc file. >=20 > Strange. We don't, at least not that I can see. The affected code uses standard dou= bles. What I'm wondering is if the compiler is getting confused between standard = and long doubles when they are both the same bit length...