linux-kernel - drivers/gpu/drm/panel/panel-samsung-ld9040.c:240:12: warning: stack frame size of 8312 bytes in function 'ld9040

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Date:   Sun, 21 Jun 2020 02:21:56 +0800
From:   kernel test robot <lkp@...el.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: drivers/gpu/drm/panel/panel-samsung-ld9040.c:240:12: warning: stack
 frame size of 8312 bytes in function 'ld9040_prepare'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4333a9b0b67bb4e8bcd91bdd80da80b0ec151162
commit: 79591b7db21d255db158afaa48c557dcab631a1c spi: Add a PTP system timestamp to the transfer structure
date:   9 months ago
config: x86_64-randconfig-a014-20200620 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project f5bbe390d23d7da0ffb110cdb24b583c2dc87eba)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 79591b7db21d255db158afaa48c557dcab631a1c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>, old ones prefixed by <<):

>> drivers/gpu/drm/panel/panel-samsung-ld9040.c:240:12: warning: stack frame size of 8312 bytes in function 'ld9040_prepare' [-Wframe-larger-than=]
static int ld9040_prepare(struct drm_panel *panel)
^
1 warning generated.

vim +/ld9040_prepare +240 drivers/gpu/drm/panel/panel-samsung-ld9040.c

ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  239  
099b3e8699322e drivers/gpu/drm/panel/panel-ld9040.c Ajay Kumar    2014-07-31 @240  static int ld9040_prepare(struct drm_panel *panel)
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  241  {
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  242  	struct ld9040 *ctx = panel_to_ld9040(panel);
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  243  	int ret;
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  244  
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  245  	ret = ld9040_power_on(ctx);
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  246  	if (ret < 0)
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  247  		return ret;
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  248  
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  249  	ld9040_init(ctx);
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  250  
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  251  	ret = ld9040_clear_error(ctx);
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  252  
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  253  	if (ret < 0)
8141028278c2ea drivers/gpu/drm/panel/panel-ld9040.c Ajay Kumar    2014-07-31  254  		ld9040_unprepare(panel);
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  255  
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  256  	return ret;
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  257  }
ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26  258  

:::::: The code at line 240 was first introduced by commit
:::::: 099b3e8699322efb7229913d2c1651588205f182 drm/panel: ld9040: Add dummy prepare and unprepare routines

:::::: TO: Ajay Kumar <ajaykumar.rs@...sung.com>
:::::: CC: Thierry Reding <treding@...dia.com>

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

Download attachment ".config.gz" of type "application/gzip" (40043 bytes)