Hi Sakari, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 79e06c4c4950be2abd8ca5d2428a8c915aa62c24 commit: e927e1e0f0dd3e353d5556503a71484008692c82 v4l: ioctl: Use %p4cc printk modifier to print FourCC codes date: 11 months ago config: mips-randconfig-r002-20220116 (https://download.01.org/0day-ci/archive/20220117/202201171150.wl8T3ge0-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c63a3175c2947e8c1a2d3bbe16a8586600705c54) 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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e927e1e0f0dd3e353d5556503a71484008692c82 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/hid/ drivers/iio/adc/ drivers/media/v4l2-core/ drivers/usb/gadget/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): mp->width, mp->height, &mp->pixelformat, ^~~~~~~~~~~~~~~ include/linux/printk.h:385:26: note: expanded from macro 'pr_cont' printk(KERN_CONT fmt, ##__VA_ARGS__) ^~~~~~~~~~~ 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__) ^~~~~~~~~~~ &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 +303 drivers/media/v4l2-core/v4l2-ioctl.c 273 274 static void v4l_print_format(const void *arg, bool write_only) 275 { 276 const struct v4l2_format *p = arg; 277 const struct v4l2_pix_format *pix; 278 const struct v4l2_pix_format_mplane *mp; 279 const struct v4l2_vbi_format *vbi; 280 const struct v4l2_sliced_vbi_format *sliced; 281 const struct v4l2_window *win; 282 const struct v4l2_sdr_format *sdr; 283 const struct v4l2_meta_format *meta; 284 u32 planes; 285 unsigned i; 286 287 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 288 switch (p->type) { 289 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 290 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 291 pix = &p->fmt.pix; 292 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", 293 pix->width, pix->height, &pix->pixelformat, 294 prt_names(pix->field, v4l2_field_names), 295 pix->bytesperline, pix->sizeimage, 296 pix->colorspace, pix->flags, pix->ycbcr_enc, 297 pix->quantization, pix->xfer_func); 298 break; 299 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 300 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 301 mp = &p->fmt.pix_mp; 302 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", 304 prt_names(mp->field, v4l2_field_names), 305 mp->colorspace, mp->num_planes, mp->flags, 306 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 307 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 308 for (i = 0; i < planes; i++) 309 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 310 mp->plane_fmt[i].bytesperline, 311 mp->plane_fmt[i].sizeimage); 312 break; 313 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 314 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 315 win = &p->fmt.win; 316 /* Note: we can't print the clip list here since the clips 317 * pointer is a userspace pointer, not a kernelspace 318 * pointer. */ 319 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", 320 win->w.width, win->w.height, win->w.left, win->w.top, 321 prt_names(win->field, v4l2_field_names), 322 win->chromakey, win->clipcount, win->clips, 323 win->bitmap, win->global_alpha); 324 break; 325 case V4L2_BUF_TYPE_VBI_CAPTURE: 326 case V4L2_BUF_TYPE_VBI_OUTPUT: 327 vbi = &p->fmt.vbi; 328 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n", 329 vbi->sampling_rate, vbi->offset, 330 vbi->samples_per_line, &vbi->sample_format, 331 vbi->start[0], vbi->start[1], 332 vbi->count[0], vbi->count[1]); 333 break; 334 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 335 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 336 sliced = &p->fmt.sliced; 337 pr_cont(", service_set=0x%08x, io_size=%d\n", 338 sliced->service_set, sliced->io_size); 339 for (i = 0; i < 24; i++) 340 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 341 sliced->service_lines[0][i], 342 sliced->service_lines[1][i]); 343 break; 344 case V4L2_BUF_TYPE_SDR_CAPTURE: 345 case V4L2_BUF_TYPE_SDR_OUTPUT: 346 sdr = &p->fmt.sdr; 348 break; 349 case V4L2_BUF_TYPE_META_CAPTURE: 350 case V4L2_BUF_TYPE_META_OUTPUT: 351 meta = &p->fmt.meta; 352 pr_cont(", dataformat=%p4cc, buffersize=%u\n", 354 break; 355 } 356 } 357 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org