Hi "Adrián, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on linus/master v5.19-rc3 next-20220622] [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] url: https://github.com/intel-lab-lkp/linux/commits/Adri-n-Larumbe/devcoredump-support-for-Panfrost-GPU-driver/20220622-095645 base: git://anongit.freedesktop.org/drm/drm drm-next config: s390-buildonly-randconfig-r004-20220622 (https://download.01.org/0day-ci/archive/20220622/202206222000.JafXnPo9-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 8b8d126598ce7bd5243da7f94f69fa1104288bee) 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/966f660f30dc5a9ff854e61d189b81e92f3453fa git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Adri-n-Larumbe/devcoredump-support-for-Panfrost-GPU-driver/20220622-095645 git checkout 966f660f30dc5a9ff854e61d189b81e92f3453fa # 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/amd/display/dc/ drivers/gpu/drm/panfrost/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/panfrost/panfrost_dump.c:6: In file included from include/linux/devcoredump.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: 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:477:61: 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/panfrost/panfrost_dump.c:6: In file included from include/linux/devcoredump.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: 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/panfrost/panfrost_dump.c:6: In file included from include/linux/devcoredump.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: 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:511:59: 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:521:59: 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:609:20: 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:617:20: 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:625:20: 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:634:21: 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:643:21: 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:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/gpu/drm/panfrost/panfrost_dump.c:235:27: warning: implicit conversion from '__le64' (aka 'unsigned long long') to '__le32' (aka 'unsigned int') changes value from 72057594037927936 to 0 [-Wconstant-conversion] iter.hdr->bomap.valid = cpu_to_le64(1); ~ ^~~~~~~~~~~~~~ include/linux/byteorder/generic.h:86:21: note: expanded from macro 'cpu_to_le64' #define cpu_to_le64 __cpu_to_le64 ^ include/uapi/linux/byteorder/big_endian.h:32:27: note: expanded from macro '__cpu_to_le64' #define __cpu_to_le64(x) ((__force __le64)__swab64((x))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 13 warnings generated. vim +235 drivers/gpu/drm/panfrost/panfrost_dump.c 102 103 void panfrost_core_dump(struct panfrost_job *job) 104 { 105 struct panfrost_device *pfdev = job->pfdev; 106 struct panfrost_dump_iterator iter; 107 struct drm_gem_object *dbo; 108 unsigned int n_obj, n_bomap_pages; 109 __le64 *bomap, *bomap_start; 110 size_t file_size; 111 u32 as_nr; 112 int slot; 113 int ret, i; 114 115 as_nr = job->mmu->as; 116 slot = panfrost_job_get_slot(job); 117 slot = slot ? slot : 0; 118 119 /* Only catch the first event, or when manually re-armed */ 120 if (!panfrost_dump_core) 121 return; 122 panfrost_dump_core = false; 123 124 /* At least, we dump registers and end marker */ 125 n_obj = 2; 126 n_bomap_pages = 0; 127 file_size = ARRAY_SIZE(panfrost_dump_registers) * 128 sizeof(struct panfrost_dump_registers); 129 130 /* Add in the active buffer objects */ 131 for (i = 0; i < job->bo_count; i++) { 132 /* 133 * Even though the CPU could be configured to use 16K or 64K pages, this 134 * is a very unusual situation for most kernel setups on SoCs that have 135 * a Panfrost device. Also many places across the driver make the somewhat 136 * arbitrary assumption that Panfrost's MMU page size is the same as the CPU's, 137 * so let's have a sanity check to ensure that's always the case 138 */ 139 WARN_ON(!IS_ALIGNED(dbo->size, PAGE_SIZE)); 140 141 dbo = job->bos[i]; 142 file_size += dbo->size; 143 n_bomap_pages += dbo->size >> PAGE_SHIFT; 144 n_obj++; 145 } 146 147 /* If we have any buffer objects, add a bomap object */ 148 if (n_bomap_pages) { 149 file_size += n_bomap_pages * sizeof(*bomap); 150 n_obj++; 151 } 152 153 /* Add the size of the headers */ 154 file_size += sizeof(*iter.hdr) * n_obj; 155 156 /* Allocate the file in vmalloc memory, it's likely to be big */ 157 iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN | 158 __GFP_NORETRY); 159 if (!iter.start) { 160 dev_warn(pfdev->dev, "failed to allocate devcoredump file\n"); 161 return; 162 } 163 164 /* Point the data member after the headers */ 165 iter.hdr = iter.start; 166 iter.data = &iter.hdr[n_obj]; 167 168 memset(iter.hdr, 0, iter.data - iter.start); 169 170 /* 171 * For now, we write the job identifier in the register dump header, 172 * so that we can decode the entire dump later with pandecode 173 */ 174 iter.hdr->reghdr.jc = cpu_to_le64(job->jc); 175 iter.hdr->reghdr.major = cpu_to_le32(PANFROSTDUMP_MAJOR); 176 iter.hdr->reghdr.minor = cpu_to_le32(PANFROSTDUMP_MINOR); 177 iter.hdr->reghdr.gpu_id = cpu_to_le32(pfdev->features.id); 178 iter.hdr->reghdr.nbos = cpu_to_le64(job->bo_count); 179 180 panfrost_core_dump_registers(&iter, pfdev, as_nr, slot); 181 182 /* Reserve space for the bomap */ 183 if (job->bo_count) { 184 bomap_start = bomap = iter.data; 185 memset(bomap, 0, sizeof(*bomap) * n_bomap_pages); 186 panfrost_core_dump_header(&iter, PANFROSTDUMP_BUF_BOMAP, 187 bomap + n_bomap_pages); 188 } 189 190 for (i = 0; i < job->bo_count; i++) { 191 struct iosys_map map; 192 struct panfrost_gem_mapping *mapping; 193 struct panfrost_gem_object *bo; 194 struct sg_page_iter page_iter; 195 void *vaddr; 196 197 bo = to_panfrost_bo(job->bos[i]); 198 mapping = job->mappings[i]; 199 200 if (!bo->base.sgt) { 201 dev_err(pfdev->dev, "Panfrost Dump: BO has no sgt, cannot dump\n"); 202 iter.hdr->bomap.valid = 0; 203 goto dump_header; 204 } 205 206 ret = drm_gem_shmem_vmap(&bo->base, &map); 207 if (ret) { 208 dev_err(pfdev->dev, "Panfrost Dump: couldn't map Buffer Object\n"); 209 iter.hdr->bomap.valid = 0; 210 goto dump_header; 211 } 212 213 WARN_ON(!mapping->active); 214 215 iter.hdr->bomap.data[0] = cpu_to_le32((bomap - bomap_start)); 216 217 for_each_sgtable_page(bo->base.sgt, &page_iter, 0) { 218 struct page *page = sg_page_iter_page(&page_iter); 219 220 if (!IS_ERR(page)) 221 *bomap++ = cpu_to_le64(page_to_phys(page)); 222 else { 223 dev_err(pfdev->dev, "Panfrost Dump: wrong page\n"); 224 *bomap++ = ~cpu_to_le64(0); 225 } 226 } 227 228 iter.hdr->bomap.iova = cpu_to_le64(mapping->mmnode.start << PAGE_SHIFT); 229 230 vaddr = map.vaddr; 231 memcpy(iter.data, vaddr, bo->base.base.size); 232 233 drm_gem_shmem_vunmap(&bo->base, &map); 234 > 235 iter.hdr->bomap.valid = cpu_to_le64(1); 236 -- 0-DAY CI Kernel Test Service https://01.org/lkp
