tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 926de8c4326c14fcf35f1de142019043597a4fac commit: 84f969e1c48ed3825986e91a0786e363d57f69d1 IB/qib: Fix null pointer subtraction compiler warning date: 3 days ago config: x86_64-randconfig-a014-20210911 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=84f969e1c48ed3825986e91a0786e363d57f69d1 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 84f969e1c48ed3825986e91a0786e363d57f69d1 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> drivers/infiniband/hw/qib/qib_sysfs.c:413:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(rc_resends); ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:413:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:414:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(seq_naks); ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:414:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:415:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(rdma_seq); ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:415:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:416:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(rnr_naks); ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:416:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:417:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(other_naks); ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:417:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:418:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(rc_timeouts); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ drivers/infiniband/hw/qib/qib_sysfs.c:418:1: note: cannot access field of null pointer drivers/infiniband/hw/qib/qib_sysfs.c:406:43: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ ^ drivers/infiniband/hw/qib/qib_sysfs.c:419:1: error: static_assert expression is not an integral constant expression QIB_DIAGC_ATTR(loop_pkts); ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/qib/qib_sysfs.c:406:16: note: expanded from macro 'QIB_DIAGC_ATTR' static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ vim +413 drivers/infiniband/hw/qib/qib_sysfs.c f24a6d4887668c Harish Chegondi 2016-01-22 404 4a7aaf88c89f12 Jason Gunthorpe 2021-06-11 405 #define QIB_DIAGC_ATTR(N) \ 84f969e1c48ed3 Jason Gunthorpe 2021-09-03 406 static_assert(&((struct qib_ibport *)0)->rvp.n_##N != (u64 *)NULL); \ f24a6d4887668c Harish Chegondi 2016-01-22 407 static struct qib_diagc_attr qib_diagc_attr_##N = { \ 4a7aaf88c89f12 Jason Gunthorpe 2021-06-11 408 .attr = __ATTR(N, 0664, diagc_attr_show, diagc_attr_store), \ 84f969e1c48ed3 Jason Gunthorpe 2021-09-03 409 .counter = \ 84f969e1c48ed3 Jason Gunthorpe 2021-09-03 410 offsetof(struct qib_ibport, rvp.n_##N) / sizeof(u64) \ f931551bafe1f1 Ralph Campbell 2010-05-23 411 } f931551bafe1f1 Ralph Campbell 2010-05-23 412 f931551bafe1f1 Ralph Campbell 2010-05-23 @413 QIB_DIAGC_ATTR(rc_resends); f931551bafe1f1 Ralph Campbell 2010-05-23 414 QIB_DIAGC_ATTR(seq_naks); f931551bafe1f1 Ralph Campbell 2010-05-23 415 QIB_DIAGC_ATTR(rdma_seq); f931551bafe1f1 Ralph Campbell 2010-05-23 416 QIB_DIAGC_ATTR(rnr_naks); f931551bafe1f1 Ralph Campbell 2010-05-23 417 QIB_DIAGC_ATTR(other_naks); f931551bafe1f1 Ralph Campbell 2010-05-23 418 QIB_DIAGC_ATTR(rc_timeouts); f931551bafe1f1 Ralph Campbell 2010-05-23 419 QIB_DIAGC_ATTR(loop_pkts); f931551bafe1f1 Ralph Campbell 2010-05-23 420 QIB_DIAGC_ATTR(pkt_drops); f931551bafe1f1 Ralph Campbell 2010-05-23 421 QIB_DIAGC_ATTR(dmawait); f931551bafe1f1 Ralph Campbell 2010-05-23 422 QIB_DIAGC_ATTR(unaligned); f931551bafe1f1 Ralph Campbell 2010-05-23 423 QIB_DIAGC_ATTR(rc_dupreq); f931551bafe1f1 Ralph Campbell 2010-05-23 424 QIB_DIAGC_ATTR(rc_seqnak); 7199435414868b Kaike Wan 2019-09-11 425 QIB_DIAGC_ATTR(rc_crwaits); f931551bafe1f1 Ralph Campbell 2010-05-23 426 :::::: The code at line 413 was first introduced by commit :::::: f931551bafe1f10ded7f5282e2aa162c267a2e5d IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters :::::: TO: Ralph Campbell :::::: CC: Roland Dreier --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org