Messages in this thread | | | Date | Fri, 10 Jun 2022 07:21:05 +0800 | From | kernel test robot <> | Subject | [sbates130272-p2pmem:p2pdma_user_cmb_v7 20/21] include/linux/pci-p2pdma.h:99:1: error: non-void function does not return a value |
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tree: https://github.com/sbates130272/linux-p2pmem.git p2pdma_user_cmb_v7 head: 45dd3bf6fe468175153066cb70820a2b2edbc61b commit: 54606cc552a950ad3eaa201cd8b1a2d1f2e6abd3 [20/21] PCI/P2PDMA: Introduce pci_mmap_p2pmem() config: s390-randconfig-r005-20220608 (https://download.01.org/0day-ci/archive/20220610/202206100713.eqeobRjO-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 971e13d69e3e7b687213fef22952be6a328c426c) 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/sbates130272/linux-p2pmem/commit/54606cc552a950ad3eaa201cd8b1a2d1f2e6abd3 git remote add sbates130272-p2pmem https://github.com/sbates130272/linux-p2pmem.git git fetch --no-tags sbates130272-p2pmem p2pdma_user_cmb_v7 git checkout 54606cc552a950ad3eaa201cd8b1a2d1f2e6abd3 # 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/nvme/target/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from drivers/nvme/target/configfs.c:12: In file included from include/linux/pci.h:39: 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: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/nvme/target/configfs.c:12: In file included from include/linux/pci.h:39: 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: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/nvme/target/configfs.c:12: In file included from include/linux/pci.h:39: 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: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); ~~~~~~~~~~ ^ In file included from drivers/nvme/target/configfs.c:13: >> include/linux/pci-p2pdma.h:99:1: error: non-void function does not return a value [-Werror,-Wreturn-type] } ^ 12 warnings and 1 error generated. -- In file included from drivers/nvme/target/core.c:10: In file included from include/linux/pci-p2pdma.h:14: In file included from include/linux/pci.h:39: 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: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/nvme/target/core.c:10: In file included from include/linux/pci-p2pdma.h:14: In file included from include/linux/pci.h:39: 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: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/nvme/target/core.c:10: In file included from include/linux/pci-p2pdma.h:14: In file included from include/linux/pci.h:39: 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: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); ~~~~~~~~~~ ^ In file included from drivers/nvme/target/core.c:10: >> include/linux/pci-p2pdma.h:99:1: error: non-void function does not return a value [-Werror,-Wreturn-type] } ^ In file included from drivers/nvme/target/core.c:14: In file included from drivers/nvme/target/trace.h:165: include/trace/define_trace.h:95:10: fatal error: './trace.h' file not found #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/define_trace.h:90:32: note: expanded from macro 'TRACE_INCLUDE' # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system) ^~~~~~~~~~~~~~~~~~~~~~~ include/trace/define_trace.h:87:34: note: expanded from macro '__TRACE_INCLUDE' # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/stringify.h:10:27: note: expanded from macro '__stringify' #define __stringify(x...) __stringify_1(x) ^~~~~~~~~~~~~~~~ include/linux/stringify.h:9:29: note: expanded from macro '__stringify_1' #define __stringify_1(x...) #x ^~ <scratch space>:87:1: note: expanded from here "./trace.h" ^~~~~~~~~~~ 12 warnings and 2 errors generated.
vim +99 include/linux/pci-p2pdma.h
18 19 #ifdef CONFIG_PCI_P2PDMA 20 int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, size_t size, 21 u64 offset); 22 int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients, 23 int num_clients, bool verbose); 24 bool pci_has_p2pmem(struct pci_dev *pdev); 25 struct pci_dev *pci_p2pmem_find_many(struct device **clients, int num_clients); 26 void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size); 27 void pci_free_p2pmem(struct pci_dev *pdev, void *addr, size_t size); 28 pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev, void *addr); 29 struct scatterlist *pci_p2pmem_alloc_sgl(struct pci_dev *pdev, 30 unsigned int *nents, u32 length); 31 void pci_p2pmem_free_sgl(struct pci_dev *pdev, struct scatterlist *sgl); 32 void pci_p2pmem_publish(struct pci_dev *pdev, bool publish); 33 int pci_p2pdma_enable_store(const char *page, struct pci_dev **p2p_dev, 34 bool *use_p2pdma); 35 ssize_t pci_p2pdma_enable_show(char *page, struct pci_dev *p2p_dev, 36 bool use_p2pdma); 37 int pci_p2pdma_file_open(struct pci_dev *pdev, struct file *file); 38 void pci_p2pdma_file_release(struct file *file); 39 int pci_mmap_p2pmem(struct pci_dev *pdev, struct vm_area_struct *vma); 40 #else /* CONFIG_PCI_P2PDMA */ 41 static inline int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, 42 size_t size, u64 offset) 43 { 44 return -EOPNOTSUPP; 45 } 46 static inline int pci_p2pdma_distance_many(struct pci_dev *provider, 47 struct device **clients, int num_clients, bool verbose) 48 { 49 return -1; 50 } 51 static inline bool pci_has_p2pmem(struct pci_dev *pdev) 52 { 53 return false; 54 } 55 static inline struct pci_dev *pci_p2pmem_find_many(struct device **clients, 56 int num_clients) 57 { 58 return NULL; 59 } 60 static inline void *pci_alloc_p2pmem(struct pci_dev *pdev, size_t size) 61 { 62 return NULL; 63 } 64 static inline void pci_free_p2pmem(struct pci_dev *pdev, void *addr, 65 size_t size) 66 { 67 } 68 static inline pci_bus_addr_t pci_p2pmem_virt_to_bus(struct pci_dev *pdev, 69 void *addr) 70 { 71 return 0; 72 } 73 static inline struct scatterlist *pci_p2pmem_alloc_sgl(struct pci_dev *pdev, 74 unsigned int *nents, u32 length) 75 { 76 return NULL; 77 } 78 static inline void pci_p2pmem_free_sgl(struct pci_dev *pdev, 79 struct scatterlist *sgl) 80 { 81 } 82 static inline void pci_p2pmem_publish(struct pci_dev *pdev, bool publish) 83 { 84 } 85 static inline int pci_p2pdma_enable_store(const char *page, 86 struct pci_dev **p2p_dev, bool *use_p2pdma) 87 { 88 *use_p2pdma = false; 89 return 0; 90 } 91 static inline ssize_t pci_p2pdma_enable_show(char *page, 92 struct pci_dev *p2p_dev, bool use_p2pdma) 93 { 94 return sprintf(page, "none\n"); 95 } 96 static inline int pci_p2pdma_file_open(struct pci_dev *pdev, 97 struct file *file) 98 { > 99 } 100 static inline void pci_p2pdma_file_release(struct file *file) 101 { 102 } 103 static inline int pci_mmap_p2pmem(struct pci_dev *pdev, 104 struct vm_area_struct *vma) 105 { 106 return -EOPNOTSUPP; 107 } 108 #endif /* CONFIG_PCI_P2PDMA */ 109 110
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