From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 074CCC2E6; Mon, 4 Sep 2023 20:39:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1693859985; x=1725395985; h=date:from:to:cc:subject:message-id:mime-version; bh=yHsRWujWc6dwR4gEjSz694op5MGSJWKuJp88uVaYQ8Q=; b=jpyhkJv5qad6k7pbXcsRilsKIms2998wH8w2Dngr5pC7JRdAUXccs463 eojQQ+4AeMBlA39OVXuHmuywnNF/DRbJOTQsFT/pgMKgFuKCgz2aB8e47 zEbWalEIVS6EwDvJ8DraJ0PgDmIAsWL1qnBa2iGQMpctYg+KDtZM7IOrk DO0bs0dJ0aThOn0sKAvqxRrlDV/qIgISGKOgaz7fNYEOqtJ4m5VMtW4EM zftmjA8mBrHb3Ie6uhlnbDCHWI9ymdPbkZWoHFW5r3dHJnlPJ5pu8lkX9 ynMle3pO2VXtTx9/CZySGEPddWpvE79cEqqIWG1EiVGFWudY9UZNOYxtw A==; X-IronPort-AV: E=McAfee;i="6600,9927,10823"; a="356965565" X-IronPort-AV: E=Sophos;i="6.02,227,1688454000"; d="scan'208";a="356965565" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2023 13:39:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10823"; a="914612672" X-IronPort-AV: E=Sophos;i="6.02,227,1688454000"; d="scan'208";a="914612672" Received: from lkp-server02.sh.intel.com (HELO e0b2ea88afd5) ([10.239.97.151]) by orsmga005.jf.intel.com with ESMTP; 04 Sep 2023 13:39:41 -0700 Received: from kbuild by e0b2ea88afd5 with local (Exim 4.96) (envelope-from ) id 1qdGMF-0000on-26; Mon, 04 Sep 2023 20:39:39 +0000 Date: Tue, 5 Sep 2023 04:38:47 +0800 From: kernel test robot To: Peter Foley Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Richard Weinberger Subject: arch/um/drivers/pcap_kern.c:18:6: warning: no previous prototype for function 'pcap_init_kern' Message-ID: <202309050424.0ZPuzTJ7-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Peter, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7a1415eebeece5a27fb40c0242b171c104ad5727 commit: 2c4d3841a82b88ae8a7b518dc6206f84f68e705a um: Avoid pcap multiple definition errors date: 7 months ago config: um-randconfig-r003-20230904 (https://download.01.org/0day-ci/archive/20230905/202309050424.0ZPuzTJ7-lkp@intel.com/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230905/202309050424.0ZPuzTJ7-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202309050424.0ZPuzTJ7-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] 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] 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' #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] 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' #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] __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] __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] __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] 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] 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] 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] 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] 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] 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] 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 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] 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 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 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki