]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
drm/amd/display: Apply e4479aecf658 to dml
authorNathan Chancellor <nathan@kernel.org>
Sat, 13 Dec 2025 06:16:43 +0000 (15:16 +0900)
committerAlex Deucher <alexander.deucher@amd.com>
Mon, 5 Jan 2026 22:22:22 +0000 (17:22 -0500)
commit70740454377f1ba3ff32f5df4acd965db99d055b
tree2e428b79cdd44ebacff663d636d010bc02139832
parentc4f2ae53863de2b5d125c3cdc9ff12668868a74a
drm/amd/display: Apply e4479aecf658 to dml

After an innocuous optimization change in clang-22, allmodconfig (which
enables CONFIG_KASAN and CONFIG_WERROR) breaks with:

  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:1724:6: error: stack frame size (3144) exceeds limit (3072) in 'dml32_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than]
   1724 | void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        |      ^

With clang-21, this function was already pretty close to the existing
limit of 3072 bytes.

  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:1724:6: error: stack frame size (2904) exceeds limit (2048) in 'dml32_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than]
   1724 | void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        |      ^

A similar situation occurred in dml2, which was resolved by
commit e4479aecf658 ("drm/amd/display: Increase sanitizer frame larger
than limit when compile testing with clang") by increasing the limit for
clang when compile testing with certain sanitizer enabled, so that
allmodconfig (an easy testing target) continues to work.

Apply that same change to the dml folder to clear up the warning for
allmodconfig, unbreaking the build.

Closes: https://github.com/ClangBuiltLinux/linux/issues/2135
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 25314b453cf812150e9951a32007a32bba85707e)
Cc: stable@vger.kernel.org
drivers/gpu/drm/amd/display/dc/dml/Makefile