Hi Maíra, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-misc/drm-misc-next] [also build test ERROR on drm/drm-next linus/master v6.1-rc6 next-20221122] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ma-ra-Canal/Introduce-debugfs-device-centered-functions/20221123-030721 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20221122190314.185015-3-mcanal%40igalia.com patch subject: [PATCH 2/6] drm: use new debugfs device-centered functions on DRM core files config: s390-randconfig-r044-20221120 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project af8c49dc1ec44339d915d988ffe0f38da68ca0e7) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/90d303b7798f22a8e99b4c86b2dfc6a43f74b678 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Ma-ra-Canal/Introduce-debugfs-device-centered-functions/20221123-030721 git checkout 90d303b7798f22a8e99b4c86b2dfc6a43f74b678 # 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=s390 SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/drm_gem_vram_helper.c:3: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from drivers/gpu/drm/drm_gem_vram_helper.c:3: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from drivers/gpu/drm/drm_gem_vram_helper.c:3: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/gpu/drm/drm_gem_vram_helper.c:961:55: error: use of undeclared identifier 'vmm' struct ttm_resource_manager *man = ttm_manager_type(&vmm->bdev, TTM_PL_VRAM); ^ 12 warnings and 1 error generated. vim +/vmm +961 drivers/gpu/drm/drm_gem_vram_helper.c 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 952 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 953 /* 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 954 * struct drm_vram_mm 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 955 */ 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 956 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 957 static int drm_vram_mm_debugfs(struct seq_file *m, void *data) 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 958 { 90d303b7798f22 Maíra Canal 2022-11-22 959 struct drm_debugfs_entry *entry = m->private; 90d303b7798f22 Maíra Canal 2022-11-22 960 struct drm_device *dev = entry->dev; 9de59bc201496f Dave Airlie 2020-08-04 @961 struct ttm_resource_manager *man = ttm_manager_type(&vmm->bdev, TTM_PL_VRAM); 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 962 struct drm_printer p = drm_seq_file_printer(m); 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 963 9de59bc201496f Dave Airlie 2020-08-04 964 ttm_resource_manager_debug(man, &p); 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 965 return 0; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 966 } 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 967 -- 0-DAY CI Kernel Test Service https://01.org/lkp