tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20210708-block-fixes-v2 head: db0174e39de7dc941f158ce53ee3af95b1635b62 commit: 32410056e36f4457d51df601c9a6ebc24b564652 [55/89] nvdimm/blk: add error handling support for add_disk() config: powerpc64-randconfig-r033-20210715 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 0e49c54a8cbd3e779e5526a5888c683c01cc3c50) 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/mcgrof/linux-next.git/com... git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git git fetch --no-tags mcgrof-next 20210708-block-fixes-v2 git checkout 32410056e36f4457d51df601c9a6ebc24b564652 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/block/ drivers/nvdimm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/powerpc/include/asm/io.h:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:184:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: 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/nvdimm/blk.c:7: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:186:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: 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/nvdimm/blk.c:7: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:188:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: 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/nvdimm/blk.c:7: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:190:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: 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/nvdimm/blk.c:7: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:192:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ drivers/nvdimm/blk.c:233:10: error: member reference base type 'void' is not a structure or union if (disk->flags & GENHD_FL_UP) ~~~~^ ~~~~~ rc = device_add_disk(dev, disk, NULL); ^ drivers/nvdimm/blk.c:272:6: error: use of undeclared identifier 'rc' if (rc) ^ drivers/nvdimm/blk.c:273:10: error: use of undeclared identifier 'rc' return rc; ^ 12 warnings and 4 errors generated. vim +/rc +271 drivers/nvdimm/blk.c 237 238 static int nsblk_attach_disk(struct nd_namespace_blk *nsblk) 239 { 240 struct device *dev = &nsblk->common.dev; 241 resource_size_t available_disk_size; 242 struct gendisk *disk; 243 u64 internal_nlba; 244 245 internal_nlba = div_u64(nsblk->size, nsblk_internal_lbasize(nsblk)); 246 available_disk_size = internal_nlba * nsblk_sector_size(nsblk); 247 248 disk = blk_alloc_disk(NUMA_NO_NODE); 249 if (!disk) 250 return -ENOMEM; 251 252 disk->fops = &nd_blk_fops; 253 disk->private_data = nsblk; 254 nvdimm_namespace_disk_name(&nsblk->common, disk->disk_name); 255 256 blk_queue_max_hw_sectors(disk->queue, UINT_MAX); 257 blk_queue_logical_block_size(disk->queue, nsblk_sector_size(nsblk)); 258 blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue); 259 260 if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk)) 261 return -ENOMEM; 262 263 if (nsblk_meta_size(nsblk)) { 264 int rc = nd_integrity_init(disk, nsblk_meta_size(nsblk)); 265 266 if (rc) 267 return rc; 268 } 269 270 set_capacity(disk, available_disk_size >> SECTOR_SHIFT); 272 if (rc) 273 return rc; 274 nvdimm_check_and_set_ro(disk); 275 return 0; 276 } 277 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org