linux-kernel - drivers/video/backlight/ltv350qv.c:192:12: warning: stack frame size of 13472 bytes in function 'ltv350qv

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Message-ID: <202010260230.VivTG0Gb-lkp@intel.com>
Date:   Mon, 26 Oct 2020 02:15:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
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/video/backlight/ltv350qv.c:192:12: warning: stack frame size
 of 13472 bytes in function 'ltv350qv_power'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d76913908102044f14381df865bb74df17a538cb
commit: cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 kasan: allow enabling stack tagging for tag-based mode
date:   3 months ago
config: arm64-randconfig-r005-20201026 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1c8371692dfe8245bc6690ff1262dcced4649d21)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

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/video/backlight/ltv350qv.c:192:12: warning: stack frame size of 13472 bytes in function 'ltv350qv_power' [-Wframe-larger-than=]
   static int ltv350qv_power(struct ltv350qv *lcd, int power)
              ^
   1 warning generated.

vim +/ltv350qv_power +192 drivers/video/backlight/ltv350qv.c

18f65c793a5106 Haavard Skinnemoen 2007-09-02  191  
18f65c793a5106 Haavard Skinnemoen 2007-09-02 @192  static int ltv350qv_power(struct ltv350qv *lcd, int power)
18f65c793a5106 Haavard Skinnemoen 2007-09-02  193  {
18f65c793a5106 Haavard Skinnemoen 2007-09-02  194  	int ret = 0;
18f65c793a5106 Haavard Skinnemoen 2007-09-02  195  
18f65c793a5106 Haavard Skinnemoen 2007-09-02  196  	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
18f65c793a5106 Haavard Skinnemoen 2007-09-02  197  		ret = ltv350qv_power_on(lcd);
18f65c793a5106 Haavard Skinnemoen 2007-09-02  198  	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
18f65c793a5106 Haavard Skinnemoen 2007-09-02  199  		ret = ltv350qv_power_off(lcd);
18f65c793a5106 Haavard Skinnemoen 2007-09-02  200  
18f65c793a5106 Haavard Skinnemoen 2007-09-02  201  	if (!ret)
18f65c793a5106 Haavard Skinnemoen 2007-09-02  202  		lcd->power = power;
18f65c793a5106 Haavard Skinnemoen 2007-09-02  203  
18f65c793a5106 Haavard Skinnemoen 2007-09-02  204  	return ret;
18f65c793a5106 Haavard Skinnemoen 2007-09-02  205  }
18f65c793a5106 Haavard Skinnemoen 2007-09-02  206  

:::::: The code at line 192 was first introduced by commit
:::::: 18f65c793a5106b9f99822ef248e71582db03386 backlight: Add Samsung LTV350QV LCD driver

:::::: TO: Haavard Skinnemoen <hskinnemoen@...el.com>
:::::: CC: Richard Purdie <rpurdie@...ys.net>

---
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" (34821 bytes)