drivers/media/test-drivers/vivid/vivid-core.c:1883:12: warning: stack frame size of 2816 bytes in function 'vivid_probe'

From: kernel test robot
Date: Fri May 07 2021 - 04:09:42 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: e48661230cc35b3d0f4367eddfc19f86463ab917
commit: fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe media: vivid: place the logic which disables ioctl on a separate function
date: 8 months ago
config: powerpc64-randconfig-r024-20210507 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a3a8a1a15b524d91b5308db68e9d293b34cd88dd)
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 powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64

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

All warnings (new ones prefixed by >>):

__do_insb
^
arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb'
#define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/test-drivers/vivid/vivid-core.c:20:
In file included from include/media/videobuf2-vmalloc.h:16:
In file included from include/media/videobuf2-v4l2.h:16:
In file included from include/media/videobuf2-core.h:18:
In file included from include/linux/dma-buf.h:18:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:250:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/test-drivers/vivid/vivid-core.c:20:
In file included from include/media/videobuf2-vmalloc.h:16:
In file included from include/media/videobuf2-v4l2.h:16:
In file included from include/media/videobuf2-core.h:18:
In file included from include/linux/dma-buf.h:18:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:5:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/test-drivers/vivid/vivid-core.c:20:
In file included from include/media/videobuf2-vmalloc.h:16:
In file included from include/media/videobuf2-v4l2.h:16:
In file included from include/media/videobuf2-core.h:18:
In file included from include/linux/dma-buf.h:18:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:10:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/test-drivers/vivid/vivid-core.c:20:
In file included from include/media/videobuf2-vmalloc.h:16:
In file included from include/media/videobuf2-v4l2.h:16:
In file included from include/media/videobuf2-core.h:18:
In file included from include/linux/dma-buf.h:18:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:15:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/test-drivers/vivid/vivid-core.c:20:
In file included from include/media/videobuf2-vmalloc.h:16:
In file included from include/media/videobuf2-v4l2.h:16:
In file included from include/media/videobuf2-core.h:18:
In file included from include/linux/dma-buf.h:18:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:20:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> drivers/media/test-drivers/vivid/vivid-core.c:1883:12: warning: stack frame size of 2816 bytes in function 'vivid_probe' [-Wframe-larger-than=]
static int vivid_probe(struct platform_device *pdev)
^
13 warnings generated.

vim +/vivid_probe +1883 drivers/media/test-drivers/vivid/vivid-core.c

c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1878
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1879 The real maximum number of virtual drivers will depend on how many drivers
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1880 will succeed. This is limited to the maximum number of devices that
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1881 videodev supports, which is equal to VIDEO_NUM_DEVICES.
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1882 */
f46d740fb025898 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2015-03-13 @1883 static int vivid_probe(struct platform_device *pdev)
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1884 {
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1885 const struct font_desc *font = find_font("VGA8x16");
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1886 int ret = 0, i;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1887
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1888 if (font == NULL) {
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1889 pr_err("vivid: could not find font\n");
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1890 return -ENODEV;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1891 }
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1892
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1893 tpg_set_font(font->data);
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1894
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1895 n_devs = clamp_t(unsigned, n_devs, 1, VIVID_MAX_DEVS);
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1896
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1897 for (i = 0; i < n_devs; i++) {
f46d740fb025898 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2015-03-13 1898 ret = vivid_create_instance(pdev, i);
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1899 if (ret) {
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1900 /* If some instantiations succeeded, keep driver */
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1901 if (i)
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1902 ret = 0;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1903 break;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1904 }
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1905 }
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1906
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1907 if (ret < 0) {
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1908 pr_err("vivid: error %d while loading driver\n", ret);
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1909 return ret;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1910 }
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1911
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1912 /* n_devs will reflect the actual number of allocated devices */
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1913 n_devs = i;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1914
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1915 return ret;
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1916 }
c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1917

:::::: The code at line 1883 was first introduced by commit
:::::: f46d740fb0258982f00ffdbddc6486e674edafb5 [media] vivid: turn this into a platform_device

:::::: TO: Hans Verkuil <hans.verkuil@xxxxxxxxx>
:::::: CC: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip

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