* drivers/media/v4l2-core/v4l2-ioctl.c:302:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value
@ 2023-03-14 10:04 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-03-14 10:04 UTC (permalink / raw)
Cc: oe-kbuild-all, llvm
TO: Luciano Coelho <luciano.coelho@intel.com>
TO: Golan Ben Ami <golan.ben.ami@intel.com>
TO: Michael Golant <michael.golant@intel.com>
TO: Johannes Berg <johannes.berg@intel.com>
Hi Sakari,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git chromeos-5.10__release/core62-50-1
head: aa035fb1ea0a81817398b02a7ca3914558fe23a5
commit: 8abcb9019ee52170db785200c4fbf321f7ea329f UPSTREAM: v4l: ioctl: Use %p4cc printk modifier to print FourCC codes
date: 1 year, 10 months ago
config: mips-randconfig-r001-20230313 (https://download.01.org/0day-ci/archive/20230314/202303141714.UxHEuotf-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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-mips64el-linux-gnuabi64
# https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git/commit/?id=8abcb9019ee52170db785200c4fbf321f7ea329f
git remote add iwlwifi-chromeos https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/chromeos.git
git fetch --no-tags iwlwifi-chromeos chromeos-5.10__release/core62-50-1
git checkout 8abcb9019ee52170db785200c4fbf321f7ea329f
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/media/v4l2-core/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303141714.UxHEuotf-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/media/v4l2-core/v4l2-ioctl.c:302:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value [-Waddress-of-packed-member]
mp->width, mp->height, &mp->pixelformat,
^~~~~~~~~~~~~~~
include/linux/printk.h:385:26: note: expanded from macro 'pr_cont'
printk(KERN_CONT fmt, ##__VA_ARGS__)
^~~~~~~~~~~
>> drivers/media/v4l2-core/v4l2-ioctl.c:346:37: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_sdr_format' may result in an unaligned pointer value [-Waddress-of-packed-member]
pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
^~~~~~~~~~~~~~~~
include/linux/printk.h:385:26: note: expanded from macro 'pr_cont'
printk(KERN_CONT fmt, ##__VA_ARGS__)
^~~~~~~~~~~
>> drivers/media/v4l2-core/v4l2-ioctl.c:352:5: warning: taking address of packed member 'dataformat' of class or structure 'v4l2_meta_format' may result in an unaligned pointer value [-Waddress-of-packed-member]
&meta->dataformat, meta->buffersize);
^~~~~~~~~~~~~~~~
include/linux/printk.h:385:26: note: expanded from macro 'pr_cont'
printk(KERN_CONT fmt, ##__VA_ARGS__)
^~~~~~~~~~~
3 warnings generated.
vim +302 drivers/media/v4l2-core/v4l2-ioctl.c
272
273 static void v4l_print_format(const void *arg, bool write_only)
274 {
275 const struct v4l2_format *p = arg;
276 const struct v4l2_pix_format *pix;
277 const struct v4l2_pix_format_mplane *mp;
278 const struct v4l2_vbi_format *vbi;
279 const struct v4l2_sliced_vbi_format *sliced;
280 const struct v4l2_window *win;
281 const struct v4l2_sdr_format *sdr;
282 const struct v4l2_meta_format *meta;
283 u32 planes;
284 unsigned i;
285
286 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
287 switch (p->type) {
288 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
289 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
290 pix = &p->fmt.pix;
291 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
292 pix->width, pix->height, &pix->pixelformat,
293 prt_names(pix->field, v4l2_field_names),
294 pix->bytesperline, pix->sizeimage,
295 pix->colorspace, pix->flags, pix->ycbcr_enc,
296 pix->quantization, pix->xfer_func);
297 break;
298 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
299 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
300 mp = &p->fmt.pix_mp;
301 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
> 302 mp->width, mp->height, &mp->pixelformat,
303 prt_names(mp->field, v4l2_field_names),
304 mp->colorspace, mp->num_planes, mp->flags,
305 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
306 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
307 for (i = 0; i < planes; i++)
308 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
309 mp->plane_fmt[i].bytesperline,
310 mp->plane_fmt[i].sizeimage);
311 break;
312 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
313 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
314 win = &p->fmt.win;
315 /* Note: we can't print the clip list here since the clips
316 * pointer is a userspace pointer, not a kernelspace
317 * pointer. */
318 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
319 win->w.width, win->w.height, win->w.left, win->w.top,
320 prt_names(win->field, v4l2_field_names),
321 win->chromakey, win->clipcount, win->clips,
322 win->bitmap, win->global_alpha);
323 break;
324 case V4L2_BUF_TYPE_VBI_CAPTURE:
325 case V4L2_BUF_TYPE_VBI_OUTPUT:
326 vbi = &p->fmt.vbi;
327 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
328 vbi->sampling_rate, vbi->offset,
329 vbi->samples_per_line, &vbi->sample_format,
330 vbi->start[0], vbi->start[1],
331 vbi->count[0], vbi->count[1]);
332 break;
333 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
334 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
335 sliced = &p->fmt.sliced;
336 pr_cont(", service_set=0x%08x, io_size=%d\n",
337 sliced->service_set, sliced->io_size);
338 for (i = 0; i < 24; i++)
339 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
340 sliced->service_lines[0][i],
341 sliced->service_lines[1][i]);
342 break;
343 case V4L2_BUF_TYPE_SDR_CAPTURE:
344 case V4L2_BUF_TYPE_SDR_OUTPUT:
345 sdr = &p->fmt.sdr;
> 346 pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
347 break;
348 case V4L2_BUF_TYPE_META_CAPTURE:
349 case V4L2_BUF_TYPE_META_OUTPUT:
350 meta = &p->fmt.meta;
351 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
> 352 &meta->dataformat, meta->buffersize);
353 break;
354 }
355 }
356
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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2023-03-14 10:04 drivers/media/v4l2-core/v4l2-ioctl.c:302:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value kernel test robot
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