linux-kernel - drivers/pci/controller/dwc/pcie-tegra194.c:243:27: warning: unused variable 'pcie_gen

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Message-ID: <202105090409.b1kTuf9b-lkp@intel.com>
Date:   Sun, 9 May 2021 04:03:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Bjorn Helgaas <helgaas@...nel.org>
Subject: drivers/pci/controller/dwc/pcie-tegra194.c:243:27: warning: unused
 variable 'pcie_gen_freq'

Hi Vidya,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b741596468b010af2846b75f5e75a842ce344a6e
commit: 7f100744749e4fe547dece3bb6557fae5f0a7252 PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata
date:   3 weeks ago
config: arm64-randconfig-r026-20210509 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 1312852040b3190a6cb7d7c1f61fe95a5e930d8d)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f100744749e4fe547dece3bb6557fae5f0a7252
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 7f100744749e4fe547dece3bb6557fae5f0a7252
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

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

All warnings (new ones prefixed by >>):

   In file included from drivers/pci/controller/dwc/pcie-tegra194.c:25:
   In file included from include/linux/pci-acpi.h:12:
   In file included from include/linux/acpi.h:35:
   In file included from include/acpi/acpi_io.h:7:
   In file included from arch/arm64/include/asm/acpi.h:12:
   include/linux/efi.h:1093:34: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch]
           status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
                                           ^
   include/linux/efi.h:1101:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch]
           get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
                                 ^
>> drivers/pci/controller/dwc/pcie-tegra194.c:243:27: warning: unused variable 'pcie_gen_freq' [-Wunused-const-variable]
   static const unsigned int pcie_gen_freq[] = {
                             ^
   drivers/pci/controller/dwc/pcie-tegra194.c:250:18: warning: unused variable 'event_cntr_ctrl_offset' [-Wunused-const-variable]
   static const u32 event_cntr_ctrl_offset[] = {
                    ^
   drivers/pci/controller/dwc/pcie-tegra194.c:259:18: warning: unused variable 'event_cntr_data_offset' [-Wunused-const-variable]
   static const u32 event_cntr_data_offset[] = {
                    ^
   5 warnings generated.


vim +/pcie_gen_freq +243 drivers/pci/controller/dwc/pcie-tegra194.c

c57247f940e8ea Vidya Sagar 2020-03-03  242  
56e15a238d9278 Vidya Sagar 2019-08-13 @243  static const unsigned int pcie_gen_freq[] = {
56e15a238d9278 Vidya Sagar 2019-08-13  244  	GEN1_CORE_CLK_FREQ,
56e15a238d9278 Vidya Sagar 2019-08-13  245  	GEN2_CORE_CLK_FREQ,
56e15a238d9278 Vidya Sagar 2019-08-13  246  	GEN3_CORE_CLK_FREQ,
56e15a238d9278 Vidya Sagar 2019-08-13  247  	GEN4_CORE_CLK_FREQ
56e15a238d9278 Vidya Sagar 2019-08-13  248  };
56e15a238d9278 Vidya Sagar 2019-08-13  249  

:::::: The code at line 243 was first introduced by commit
:::::: 56e15a238d92788a2d09e0c5c26a5de1b3156931 PCI: tegra: Add Tegra194 PCIe support

:::::: TO: Vidya Sagar <vidyas@...dia.com>
:::::: CC: Lorenzo Pieralisi <lorenzo.pieralisi@....com>

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

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