linux-kernel - drivers/media/common/saa7146/saa7146_hlp.c:648:5: warning: stack frame size of 1088 bytes in function 'saa7146_enable

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Date:   Fri, 27 Nov 2020 07:29:56 +0800
From:   kernel test robot <lkp@...el.com>
To:     George Popescu <georgepope@...roid.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>,
        David Brazdil <dbrazdil@...gle.com>,
        Marco Elver <elver@...gle.com>
Subject: drivers/media/common/saa7146/saa7146_hlp.c:648:5: warning: stack
 frame size of 1088 bytes in function 'saa7146_enable_overlay'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   85a2c56cb4454c73f56d3099d96942e7919b292f
commit: 6a6155f664e31c9be43cd690541a9a682ba3dc22 ubsan: introduce CONFIG_UBSAN_LOCAL_BOUNDS for Clang
date:   6 weeks ago
config: mips-randconfig-r022-20201127 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 175ebad958a0ebaf6c56c20ab30b9d4347742c29)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6a6155f664e31c9be43cd690541a9a682ba3dc22
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 6a6155f664e31c9be43cd690541a9a682ba3dc22
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

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/media/common/saa7146/saa7146_hlp.c:648:5: warning: stack frame size of 1088 bytes in function 'saa7146_enable_overlay' [-Wframe-larger-than=]
   int saa7146_enable_overlay(struct saa7146_fh *fh)
       ^
   1 warning generated.

vim +/saa7146_enable_overlay +648 drivers/media/common/saa7146/saa7146_hlp.c

^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  647  
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16 @648  int saa7146_enable_overlay(struct saa7146_fh *fh)
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  649  {
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  650  	struct saa7146_dev *dev = fh->dev;
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  651  	struct saa7146_vv *vv = dev->vv_data;
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  652  
5da545ad08a3c6e drivers/media/common/saa7146_hlp.c Hans Verkuil   2012-05-01  653  	saa7146_set_window(dev, vv->ov.win.w.width, vv->ov.win.w.height, vv->ov.win.field);
5da545ad08a3c6e drivers/media/common/saa7146_hlp.c Hans Verkuil   2012-05-01  654  	saa7146_set_position(dev, vv->ov.win.w.left, vv->ov.win.w.top, vv->ov.win.w.height, vv->ov.win.field, vv->ov_fmt->pixelformat);
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  655  	saa7146_set_output_format(dev, vv->ov_fmt->trans);
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  656  	saa7146_set_clipping_rect(fh);
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  657  
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  658  	/* enable video dma1 */
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  659  	saa7146_write(dev, MC1, (MASK_06 | MASK_22));
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  660  	return 0;
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  661  }
^1da177e4c3f415 drivers/media/common/saa7146_hlp.c Linus Torvalds 2005-04-16  662  

:::::: The code at line 648 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

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

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