From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 359C73E2752; Fri, 10 Jul 2026 08:01:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783670500; cv=none; b=gAyKeWsw3whgUVwksOs5jka1oGBGVQtLBsJRaJQCkHNYrRqCk2aIB17TFuoEgvyIQ+GU7zw7C2jvU2c7mU7UZpoTQAeZsBbjIV0/65pNDH4Gp57ESVZO/qAHLADkRN4DJTD0OPXuT4uMrCKBmalZSjaSEuL+/f7++go7Z+X2V7g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783670500; c=relaxed/simple; bh=ObJzpFIpxpg9cDnYqv3sq3E7IBZblhK95GUSkLHFDPI=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=CsSPBZfp2SCx9HgcCBhPv+y+Mnbc9VJo5gJiLSs/chLyitU3Pw+TMYAz9BwVEiYYDTdEXQ/UXMFb43llJSSQoyJ/WCasJr0DqUk/rqLKbe0r1K9JrNNRBNo1rKoTJdL2ljOpOUmpraPKsRNoFp2RcAJTwRwbMrnTkz5UhGeankc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=mClY73mw; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="mClY73mw" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66A7mJlo4024913; Fri, 10 Jul 2026 08:01:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=TRuwl8 6BGWpU1jU8guWAWBH8ZYVteU8GtSs4ecwEwWc=; b=mClY73mweHu5ygEi9BG5GP C0Ku4aPCymlqXbMQVpPqdi1OGQ4em6CUOBfNKkuZQoKSn1hAdszLX9S+EEpeqdKo RItd6Eay1jiYW9QHiHGqA6neUhkdKaAnKDxr61b6TRm2i7esjA4Q/CW0T/Kx32kC +BHtFelrZt1VsM66Xi6FxMsydCGfgfBmvWHRQmQ9iy69vdxCNOXBnv/ysD+bub91 /b/vD/bFhX4D+0VEjnaVgEIamRIJH+ZvjJ0V3N+HlH1fHrP5kqhKas19c+nfTHYQ jueBM4ZvhP17ECp7bmxuQhqoss2yfk73sL8FPg9Aol3HvnFC4eILtH7BKRw/RB2A == Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4f6rke5wjf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Jul 2026 08:01:29 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 66A7oVtj015623; Fri, 10 Jul 2026 08:01:29 GMT Received: from smtprelay04.dal12v.mail.ibm.com ([172.16.1.6]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4f7cvwh7rg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Jul 2026 08:01:29 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (smtpav05.wdc07v.mail.ibm.com [10.39.53.232]) by smtprelay04.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 66A81Shq29491918 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Jul 2026 08:01:28 GMT Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 488A45805F; Fri, 10 Jul 2026 08:01:28 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D87158063; Fri, 10 Jul 2026 08:01:23 +0000 (GMT) Received: from [9.61.248.61] (unknown [9.61.248.61]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 10 Jul 2026 08:01:23 +0000 (GMT) Message-ID: <14e618d3-34ea-4bc9-b9a8-3783e2b61e0a@linux.ibm.com> Date: Fri, 10 Jul 2026 13:31:21 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [REGRESSION] drm/amd/display: amdgpu_dm_plane_test.ko fails to build due to modpost "too long symbol" Content-Language: en-GB From: Venkat Rao Bagalkote To: Randy Dunlap , amd-gfx@lists.freedesktop.org, bhawanpreet.lakha@amd.com Cc: dri-devel@lists.freedesktop.org, alexander.deucher@amd.com, george.zhang@amd.com, bhawanpreet.lakha@amd.com, LKML , Madhavan Srinivasan , christian.koenig@amd.com, harry.wentland@amd.com, sunpeng.li@amd.com, broonie@kernel.org, "Christophe Leroy (CS GROUP)" , Linux Next Mailing List , alex.hung@amd.com References: <54f6efe8-cab8-4fc8-bf00-f012b3224e54@infradead.org> <85931e07-60eb-4df2-bc52-773c63f27f6c@linux.ibm.com> In-Reply-To: <85931e07-60eb-4df2-bc52-773c63f27f6c@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=M7J97Sws c=1 sm=1 tr=0 ts=6a50a6da cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VwQbUJbxAAAA:8 a=e5mUnYsNAAAA:8 a=VnNF1IyMAAAA:8 a=zd2uoN0lAAAA:8 a=SLFSCceQY6lPwsTqLRcA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=Vxmtnl_E_bksehYqCbjh:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEwMDA3NCBTYWx0ZWRfX0AAz39XYJ6br n52g+n7Uo0O666+XoQaqT01MESVilyVfzB9EckxfkLdYYhrmdgDknmzSQEEw/KIxGXXKqBtsB/t dGGV0mEOq6Cmbvylx+JSoldV37g/rw+CT3LQRzuDeVokTtdCVfGkRs00pVx3HtLj5lHY1EjLsNu 5VZYmRipvW/dM9iMAQy2j90mtwYBL+NOUTx3K9esWwQ2aI6rRkXDPWXzejPjJRS19NkDRgKLJWx AUw7aZF4oC3imGw2mQySKp4fX9gusais46kLZn6YPhZ5yGtj1YJk5udZjE+5cW5RfmClt3kpZGp 9+jKJlcUuOJvE0NJmr0JPgsPptIjERblN6WlYL2CEl4uzftyTicDblolJxgrLowwZIDZ9cGUWA/ 25DdxQ8NZEXcsNU8OqMUGG8oPLEpj1MOHrjc6BqSQ380cPh6gbW6csel6BVMxyYaUh8Xm3kKQDS tXs6X2gQ1wS2+o0XCiw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEwMDA3NCBTYWx0ZWRfX4zeUO8LDexsE LK91sct/bPYvGcJlWMIUXQOTWmvZ7kZVyRXT3N8y6difVQNfCag8hiMAszJiuw2Aur1iWXBYIHb IHTPoG3+zRq2x3spELlG9FZAvfmXFpM= X-Proofpoint-GUID: uZ-waZZZpH3XZhpfD9ErbABEoYWmFnVG X-Proofpoint-ORIG-GUID: uZ-waZZZpH3XZhpfD9ErbABEoYWmFnVG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-10_02,2026-07-09_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1011 adultscore=0 priorityscore=1501 bulkscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607100074 On 10/07/26 10:45 am, Venkat Rao Bagalkote wrote: > > On 09/07/26 11:53 pm, Randy Dunlap wrote: >> >> On 7/7/26 10:05 PM, Venkat Rao Bagalkote wrote: >>> Greetings!!! >>> >>> linux-next is failing to build for me with: >>> >>> ERROR: modpost: too long symbol >>> "amdgpu_dm_plane_fill_gfx9_plane_attributes_from_modifiers" >>> [drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/tests/amdgpu_dm_plane_test.ko] >>> >>> >>> make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1 >>> make[1]: *** [Makefile:2165: modpost] Error 2 >>> make: *** [Makefile:248: __sub-make] Error 2 >>> >>> The failure occurs during modpost while building: >>> >>> drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_plane_test.ko >>> >>> This appears to be a regression in the AMD display KUnit test code. >>> >>> Could someone please take a look? >>> >>> >>> If you happen to fix this, please add below tag. >>> >>> Reported-by: Venkat Rao Bagalkote >> Hi, >> I cannot reproduce this when using gcc v15.3.0. >> >> Which compiler & version are you using? >> > Hello, > > I am seeing this across below mentioned gcc version. > > > gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4) > gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-11) > gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-7) > > > Attched is the .config file. Git bisect is pointing to below commit as first bad commit. # git bisect bad 2b147895be109e0860269a7a72c697cdf049a885 is the first bad commit commit 2b147895be109e0860269a7a72c697cdf049a885 (HEAD) Author: Bhawanpreet Lakha Date:   Fri Jun 12 16:12:21 2026 -0400     drm/amd/display: Add kunit tests for amdgpu_dm_plane     Add kunit tests for some functions in amdgpu_dm_plane.     Assisted-by: Copilot:Claude-Opus-4.8     Reviewed-by: Alex Hung     Signed-off-by: Bhawanpreet Lakha     Signed-off-by: George Zhang     Signed-off-by: Alex Deucher  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c   |  115 ++++++-----  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.h   |   51 +++++  drivers/gpu/drm/amd/display/amdgpu_dm/tests/Makefile  |    2 +  drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_plane_test.c | 1204 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  4 files changed, 1325 insertions(+), 47 deletions(-)  create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_plane_test.c # git bisect log git bisect start # status: waiting for both good and bad commits # bad: [5c73cd9f0819c1c44e373e3dabb68318b1de1a12] Add linux-next specific files for 20260707 git bisect bad 5c73cd9f0819c1c44e373e3dabb68318b1de1a12 # good: [8cdeaa50eae8dad34885515f62559ee83e7e8dda] Linux 7.2-rc2 git bisect good 8cdeaa50eae8dad34885515f62559ee83e7e8dda # good: [aac7863446a8e0cf380f4a5087bc3cdc9b8c14c0] Merge branch 'master' of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git git bisect good aac7863446a8e0cf380f4a5087bc3cdc9b8c14c0 # bad: [fe28d02cde5372d7f71cc6132ccdef37a98ac750] Merge branch 'for-linux-next' of https://gitlab.freedesktop.org/drm/i915/kernel.git git bisect bad fe28d02cde5372d7f71cc6132ccdef37a98ac750 # good: [0639cb26862afe4e35a689a8b5df8b9117c19f52] Merge tag 'drm-xe-next-2026-07-03' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-next git bisect good 0639cb26862afe4e35a689a8b5df8b9117c19f52 # good: [4e9c8a9c322427055c4892183d266ba391af1bc8] drm/amdkfd: drop struct kfd_signal_page wrapper git bisect good 4e9c8a9c322427055c4892183d266ba391af1bc8 # bad: [ea33aa1545535fdb4c1a208b7bfd63314c3a4aa2] drm/amdgpu: Drop legacy ACA log RAS error data code git bisect bad ea33aa1545535fdb4c1a208b7bfd63314c3a4aa2 # good: [a17e79d01f22182a9fcbe79fcbe2ad1477d43e0f] drm/amd/pm: Validate pp_table header before reading size git bisect good a17e79d01f22182a9fcbe79fcbe2ad1477d43e0f # bad: [7a561c2b1b63abcffb55f625c0d0adb68ab2961a] drm/amd/display: Simplify boolean checks git bisect bad 7a561c2b1b63abcffb55f625c0d0adb68ab2961a # good: [53ef33c084c5778cc2dcd1efff25e31b6e231141] drm/amd/pm: Validate Tonga PPTable subtable bounds git bisect good 53ef33c084c5778cc2dcd1efff25e31b6e231141 # good: [fe5966d4fdcbed91e6b3478ea6c89d9915d6ed4a] drm/amdkfd: move TBA/TMA from system to device memory git bisect good fe5966d4fdcbed91e6b3478ea6c89d9915d6ed4a # good: [7a39b1c3b2e6b27f4230a20ccf9ac5a2737fa8b0] drm/amd/display: Replace repeated no-native-i2c checks with force_i2c_over_aux field git bisect good 7a39b1c3b2e6b27f4230a20ccf9ac5a2737fa8b0 # good: [88ae862060f05cd8279e764832f04eafafa505d8] drm/amd/display: Add more KUnit tests for amdgpu_dm_colorop git bisect good 88ae862060f05cd8279e764832f04eafafa505d8 # bad: [2b147895be109e0860269a7a72c697cdf049a885] drm/amd/display: Add kunit tests for amdgpu_dm_plane git bisect bad 2b147895be109e0860269a7a72c697cdf049a885 # first bad commit: [2b147895be109e0860269a7a72c697cdf049a885] drm/amd/display: Add kunit tests for amdgpu_dm_plane > > > Regards, > > Venkat.