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linux/drivers/gpu/drm/amd/display
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Nathan Chancellor 63e09c1f46 drm/amd/display: Increase frame-larger-than for all display_mode_vba files 
[ Upstream commit e63e35f016 ]

After a recent change in LLVM, allmodconfig (which has CONFIG_KCSAN=y
and CONFIG_WERROR=y enabled) has a few new instances of
-Wframe-larger-than for the mode support and system configuration
functions:

  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn20/display_mode_vba_20v2.c:3393:6: error: stack frame size (2144) exceeds limit (2048) in 'dml20v2_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than]
   3393 | void dml20v2_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        |      ^
  1 error generated.

  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn21/display_mode_vba_21.c:3520:6: error: stack frame size (2192) exceeds limit (2048) in 'dml21_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than]
   3520 | void dml21_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        |      ^
  1 error generated.

  drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn20/display_mode_vba_20.c:3286:6: error: stack frame size (2128) exceeds limit (2048) in 'dml20_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than]
   3286 | void dml20_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        |      ^
  1 error generated.

Without the sanitizers enabled, there are no warnings.

This was the catalyst for commit 6740ec97bc ("drm/amd/display:
Increase frame warning limit with KASAN or KCSAN in dml2") and that same
change was made to dml in commit 5b750b2253 ("drm/amd/display:
Increase frame warning limit with KASAN or KCSAN in dml") but the
frame_warn_flag variable was not applied to all files. Do so now to
clear up the warnings and make all these files consistent.

Cc: stable@vger.kernel.org
Closes: https://github.com/ClangBuiltLinux/linux/issue/1990
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-03-15 10:48:22 -04:00
..
amdgpu_dm drm/amd/display: Re-arrange FPU code structure for dcn2x 2024-03-15 10:48:21 -04:00
dc drm/amd/display: Increase frame-larger-than for all display_mode_vba files 2024-03-15 10:48:22 -04:00
dmub drm/amd/display: Change the DMCUB mailbox memory location from FB to inbox 2023-11-28 16:56:36 +00:00
include drm/amd/display: Reduce dmesg error to a debug print 2022-03-08 19:12:43 +01:00
modules drm/amd/display: prevent potential division by zero errors 2023-09-19 12:23:02 +02:00
Kconfig drm/amdgpu: temporarily disable broken Clang builds due to blown stack-frame 2022-12-08 11:28:43 +01:00
Makefile drm/amd/display: Drop CONFIG_DRM_AMD_DC_DMUB guards 2019-11-13 15:29:42 -05:00
TODO drm/amd/display: Convert remaining loggers off dc_logger 2018-07-13 14:48:42 -05:00