From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84352C433F5 for ; Fri, 4 Mar 2022 05:21:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 227F68D0002; Fri, 4 Mar 2022 00:21:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1B14D8D0001; Fri, 4 Mar 2022 00:21:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 079248D0002; Fri, 4 Mar 2022 00:21:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id EB3E08D0001 for ; Fri, 4 Mar 2022 00:21:49 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id BE9F02373D for ; 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03 Mar 2022 21:21:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,154,1643702400"; d="scan'208";a="536148172" Received: from lkp-server01.sh.intel.com (HELO ccb16ba0ecc3) ([10.239.97.150]) by orsmga007.jf.intel.com with ESMTP; 03 Mar 2022 21:21:42 -0800 Received: from kbuild by ccb16ba0ecc3 with local (Exim 4.92) (envelope-from ) id 1nQ0Np-0001JO-Cz; Fri, 04 Mar 2022 05:21:41 +0000 Date: Fri, 4 Mar 2022 13:20:56 +0800 From: kernel test robot To: Miguel Ojeda Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, Linux Memory Management List , Alex Gaynor , Finn Behrens , Adam Bratschi-Kaye , Wedson Almeida Filho , Michael Ellerman , Sven Van Asbroeck , Gary Guo , Boris-Chengbiao Zhou , Boqun Feng , Douglas Su , Dariusz Sosnowski , Antonio Terceiro , Daniel Xu , Miguel Cano Subject: [linux-next:master 4865/10468] include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false Message-ID: <202203041338.Bv4qJWdU-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: BC77816000C X-Rspam-User: Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=PBmu8o1V; spf=none (imf08.hostedemail.com: domain of lkp@intel.com has no SPF policy when checking 192.55.52.136) smtp.mailfrom=lkp@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Stat-Signature: pdotik8697kacyq64t96n97akz1ckxdx X-HE-Tag: 1646371308-435771 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Miguel, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 91265a6da44d13296bdb5b3fbafa19d06be462f2 commit: 17295a6760d551958a773a8342cff03630f3bff8 [4865/10468] Kbuild: add Rust support config: riscv-randconfig-r006-20220304 (https://download.01.org/0day-ci/archive/20220304/202203041338.Bv4qJWdU-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=17295a6760d551958a773a8342cff03630f3bff8 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 17295a6760d551958a773a8342cff03630f3bff8 # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false >> include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior err: false cannot find function `iounmap` in module `bindings` --> rust/kernel/io_mem.rs:225:28 | 225 | unsafe { bindings::iounmap(self.ptr as _) }; | ^^^^^^^ help: a function with a similar name exists: `ioremap` | ::: rust/bindings_helpers_generated.rs:40:5 | 40 | / pub fn ioremap( 41 | | offset: resource_size_t, 42 | | size: c_types::c_ulong, 43 | | ) -> c_types::c_void; | |______________________________- similarly named function `ioremap` defined here vim +464 include/asm-generic/io.h 3f7e212df82ca0 Arnd Bergmann 2009-05-13 450 9216efafc52ff9 Thierry Reding 2014-10-01 451 /* 9216efafc52ff9 Thierry Reding 2014-10-01 452 * {in,out}{b,w,l}() access little endian I/O. {in,out}{b,w,l}_p() can be 9216efafc52ff9 Thierry Reding 2014-10-01 453 * implemented on hardware that needs an additional delay for I/O accesses to 9216efafc52ff9 Thierry Reding 2014-10-01 454 * take effect. 9216efafc52ff9 Thierry Reding 2014-10-01 455 */ 9216efafc52ff9 Thierry Reding 2014-10-01 456 f009c89df79abe John Garry 2020-03-28 457 #if !defined(inb) && !defined(_inb) f009c89df79abe John Garry 2020-03-28 458 #define _inb _inb 214ba3584b2e2c Stafford Horne 2020-07-26 459 static inline u8 _inb(unsigned long addr) 9216efafc52ff9 Thierry Reding 2014-10-01 460 { 87fe2d543f8173 Sinan Kaya 2018-04-05 461 u8 val; 87fe2d543f8173 Sinan Kaya 2018-04-05 462 87fe2d543f8173 Sinan Kaya 2018-04-05 463 __io_pbr(); 87fe2d543f8173 Sinan Kaya 2018-04-05 @464 val = __raw_readb(PCI_IOBASE + addr); abbbbc83a210e9 Will Deacon 2019-02-22 465 __io_par(val); 87fe2d543f8173 Sinan Kaya 2018-04-05 466 return val; 9216efafc52ff9 Thierry Reding 2014-10-01 467 } 9216efafc52ff9 Thierry Reding 2014-10-01 468 #endif 9216efafc52ff9 Thierry Reding 2014-10-01 469 :::::: The code at line 464 was first introduced by commit :::::: 87fe2d543f817300e13f0ea683f38c122737856e io: change inX() to have their own IO barrier overrides :::::: TO: Sinan Kaya :::::: CC: Arnd Bergmann --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org