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 <[email protected]>
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 <[email protected]>
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 <[email protected]>
Signed-off-by: Bhawanpreet Lakha <[email protected]>
Signed-off-by: George Zhang <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
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.
