linux-kernel - [lpieralisi-pci:pci/rcar 2/2] drivers/pci/controller/pcie-rcar-host.c:139:3: error: instruction requires: data-barriers

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Message-ID: <202203091741.IetDk7a7-lkp@intel.com>
Date:   Wed, 9 Mar 2022 17:04:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Marek Vasut <marek.vasut+renesas@...il.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        Bjorn Helgaas <helgaas@...nel.org>,
        linux-kernel@...r.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [lpieralisi-pci:pci/rcar 2/2]
 drivers/pci/controller/pcie-rcar-host.c:139:3: error: instruction requires:
 data-barriers

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git pci/rcar
head:   9775965dbae50a04f12879179d6d6fb58f240d6b
commit: 9775965dbae50a04f12879179d6d6fb58f240d6b [2/2] PCI: rcar: Use PCI_SET_ERROR_RESPONSE after read which triggered an exception
config: arm-randconfig-c002-20220307 (https://download.01.org/0day-ci/archive/20220309/202203091741.IetDk7a7-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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git/commit/?id=9775965dbae50a04f12879179d6d6fb58f240d6b
        git remote add lpieralisi-pci https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
        git fetch --no-tags lpieralisi-pci pci/rcar
        git checkout 9775965dbae50a04f12879179d6d6fb58f240d6b
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/pci/controller/pcie-rcar-host.c:139:3: error: instruction requires: data-barriers
                   __rcar_pci_rw_reg_workaround("str")
                   ^
   drivers/pci/controller/pcie-rcar-host.c:120:4: note: expanded from macro '__rcar_pci_rw_reg_workaround'
                   "2:     isb\n"                                          \
                    ^
   <inline asm>:2:4: note: instantiated into assembly here
   2:      isb
           ^
   drivers/pci/controller/pcie-rcar-host.c:153:3: error: instruction requires: data-barriers
                   __rcar_pci_rw_reg_workaround("ldr")
                   ^
   drivers/pci/controller/pcie-rcar-host.c:120:4: note: expanded from macro '__rcar_pci_rw_reg_workaround'
                   "2:     isb\n"                                          \
                    ^
   <inline asm>:2:4: note: instantiated into assembly here
   2:      isb
           ^
   2 errors generated.


vim +139 drivers/pci/controller/pcie-rcar-host.c

   132	
   133	static int rcar_pci_write_reg_workaround(struct rcar_pcie *pcie, u32 val,
   134						 unsigned int reg)
   135	{
   136		int error = PCIBIOS_SUCCESSFUL;
   137	#ifdef CONFIG_ARM
   138		asm volatile(
 > 139			__rcar_pci_rw_reg_workaround("str")
   140		: "+r"(error):"r"(val), "r"(pcie->base + reg) : "memory");
   141	#else
   142		rcar_pci_write_reg(pcie, val, reg);
   143	#endif
   144		return error;
   145	}
   146	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org