linux-kernel - drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calc_auto.c:121:6: warning: stack frame size of 3392 bytes in function 'mode_support_and_system

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Date:   Wed, 3 Feb 2021 01:40:38 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calc_auto.c:121:6:
 warning: stack frame size of 3392 bytes in function
 'mode_support_and_system_configuration'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   88bb507a74ea7d75fa49edd421eaa710a7d80598
commit: d0a3ac549f389c1511a4df0d7638536305205d20 ubsan: enable for all*config builds
date:   7 weeks ago
config: powerpc-randconfig-r035-20210202 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 275c6af7d7f1ed63a03d05b4484413e447133269)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0a3ac549f389c1511a4df0d7638536305205d20
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d0a3ac549f389c1511a4df0d7638536305205d20
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calc_auto.c:121:6: warning: stack frame size of 3392 bytes in function 'mode_support_and_system_configuration' [-Wframe-larger-than=]
   void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)
        ^
   1 warning generated.
--
   drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn30/display_mode_vba_30.c:1917:13: warning: stack frame size of 5392 bytes in function 'DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation' [-Wframe-larger-than=]
   static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation(
               ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn30/display_mode_vba_30.c:3641:6: warning: stack frame size of 5696 bytes in function 'dml30_ModeSupportAndSystemConfigurationFull' [-Wframe-larger-than=]
   void dml30_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_lib)
        ^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn30/display_mode_vba_30.c:6679:13: warning: stack frame size of 2288 bytes in function 'UseMinimumDCFCLK' [-Wframe-larger-than=]
   static void UseMinimumDCFCLK(
               ^
   3 warnings generated.


vim +/mode_support_and_system_configuration +121 drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calc_auto.c

5634fb6078dd9b Dmytro Laktyushkin 2017-06-15  120  
74c49c7ac14f3a Harry Wentland     2017-05-08 @121  void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)

:::::: The code at line 121 was first introduced by commit
:::::: 74c49c7ac14f3a7cc500be959709f3473a6a49e7 drm/amdgpu/display: Add calcs code for DCN

:::::: TO: Harry Wentland <harry.wentland@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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