Messages in this thread | | | Date | Sat, 20 Jan 2024 00:53:25 +0800 | From | kernel test robot <> | Subject | arch/um/drivers/pcap_kern.c:18:6: warning: no previous prototype for function 'pcap_init_kern' |
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Hi Peter,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9d1694dc91ce7b80bc96d6d8eaf1a1eca668d847 commit: 2c4d3841a82b88ae8a7b518dc6206f84f68e705a um: Avoid pcap multiple definition errors date: 11 months ago config: um-randconfig-001-20240116 (https://download.01.org/0day-ci/archive/20240120/202401200023.6yVSKj6N-lkp@intel.com/config) compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 9bde5becb44ea071f5e1fa1f5d4071dc8788b18c) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240120/202401200023.6yVSKj6N-lkp@intel.com/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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202401200023.6yVSKj6N-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/um/drivers/pcap_kern.c:7: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: 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/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from arch/um/drivers/pcap_kern.c:7: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: 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/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from arch/um/drivers/pcap_kern.c:7: In file included from include/linux/netdevice.h:38: In file included from include/net/net_namespace.h:43: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: 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); | ~~~~~~~~~~ ^ >> arch/um/drivers/pcap_kern.c:18:6: warning: no previous prototype for function 'pcap_init_kern' [-Wmissing-prototypes] 18 | void pcap_init_kern(struct net_device *dev, void *data) | ^ arch/um/drivers/pcap_kern.c:18:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 18 | void pcap_init_kern(struct net_device *dev, void *data) | ^ | static arch/um/drivers/pcap_kern.c:53:5: warning: no previous prototype for function 'pcap_setup' [-Wmissing-prototypes] 53 | int pcap_setup(char *str, char **mac_out, void *data) | ^ arch/um/drivers/pcap_kern.c:53:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 53 | int pcap_setup(char *str, char **mac_out, void *data) | ^ | static 14 warnings generated.
vim +/pcap_init_kern +18 arch/um/drivers/pcap_kern.c
17 > 18 void pcap_init_kern(struct net_device *dev, void *data) 19 { 20 struct uml_net_private *pri; 21 struct pcap_data *ppri; 22 struct pcap_init *init = data; 23 24 pri = netdev_priv(dev); 25 ppri = (struct pcap_data *) pri->user; 26 ppri->host_if = init->host_if; 27 ppri->promisc = init->promisc; 28 ppri->optimize = init->optimize; 29 ppri->filter = init->filter; 30 31 printk("pcap backend, host interface %s\n", ppri->host_if); 32 } 33
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