Hi Joe, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Joe-Damato/net-mlx4-Track-RX-allocation-failures-in-a-stat/20240424-035224 base: net-next/main patch link: https://lore.kernel.org/r/20240423194931.97013-3-jdamato%40fastly.com patch subject: [PATCH net-next 2/3] net/mlx4: link NAPI instances to queues and IRQs config: s390-defconfig (https://download.01.org/0day-ci/archive/20240424/202404241518.4TvjoN07-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 5ef5eb66fb428aaf61fb51b709f065c069c11242) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240424/202404241518.4TvjoN07-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404241518.4TvjoN07-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:2208: include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 537 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/net/ethernet/mellanox/mlx4/en_cq.c:34: In file included from include/linux/mlx4/cq.h:39: In file included from include/linux/mlx4/device.h:37: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | 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] 560 | 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' 37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) | ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' 102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) | ^ In file included from drivers/net/ethernet/mellanox/mlx4/en_cq.c:34: In file included from include/linux/mlx4/cq.h:39: In file included from include/linux/mlx4/device.h:37: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | 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' 35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) | ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' 115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) | ^ In file included from drivers/net/ethernet/mellanox/mlx4/en_cq.c:34: In file included from include/linux/mlx4/cq.h:39: In file included from include/linux/mlx4/device.h:37: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:28: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __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] 594 | __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] 604 | __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] 692 | 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] 700 | 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] 708 | 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] 717 | 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] 726 | 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] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> drivers/net/ethernet/mellanox/mlx4/en_cq.c:202:12: warning: variable 'qtype' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 202 | else if (cq->type == TX) | ^~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx4/en_cq.c:205:45: note: uninitialized use occurs here 205 | netif_queue_set_napi(cq->dev, cq->cq_idx, qtype, NULL); | ^~~~~ drivers/net/ethernet/mellanox/mlx4/en_cq.c:202:8: note: remove the 'if' if its condition is always true 202 | else if (cq->type == TX) | ^~~~~~~~~~~~~~~~~~~ 203 | qtype = NETDEV_QUEUE_TYPE_TX; drivers/net/ethernet/mellanox/mlx4/en_cq.c:197:2: note: variable 'qtype' is declared here 197 | enum netdev_queue_type qtype; | ^ 18 warnings generated. vim +202 drivers/net/ethernet/mellanox/mlx4/en_cq.c 194 195 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 196 { 197 enum netdev_queue_type qtype; 198 199 if (cq->type != TX_XDP) { 200 if (cq->type == RX) 201 qtype = NETDEV_QUEUE_TYPE_RX; > 202 else if (cq->type == TX) 203 qtype = NETDEV_QUEUE_TYPE_TX; 204 205 netif_queue_set_napi(cq->dev, cq->cq_idx, qtype, NULL); 206 napi_disable(&cq->napi); 207 netif_napi_del(&cq->napi); 208 } 209 210 mlx4_cq_free(priv->mdev->dev, &cq->mcq); 211 } 212 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
