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    Subjectdrivers/perf/hisilicon/hisi_uncore_hha_pmu.c:89:7: warning: variable 'val' set but not used
    tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
    head: 324c92e5e0ee0e993bdb106fac407846ed677f6b
    commit: 932f6a99f9b0c6b7039a5e2ce961009a8dc8c07c drivers/perf: hisi: Add new functions for HHA PMU
    date: 10 weeks ago
    config: arm64-randconfig-r005-20210603 (attached as .config)
    compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d8e0ae9a76a62bdc6117630d59bf9967ac9bb4ea)
    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=932f6a99f9b0c6b7039a5e2ce961009a8dc8c07c
    git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
    git fetch --no-tags linus master
    git checkout 932f6a99f9b0c6b7039a5e2ce961009a8dc8c07c
    # save the attached .config to linux build tree
    COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64

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

    All warnings (new ones prefixed by >>):

    In file included from drivers/perf/hisilicon/hisi_uncore_hha_pmu.c:11:
    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/perf/hisilicon/hisi_uncore_hha_pmu.c:89:7: warning: variable 'val' set but not used [-Wunused-but-set-variable]
    u32 val;
    ^
    drivers/perf/hisilicon/hisi_uncore_hha_pmu.c:103:7: warning: variable 'val' set but not used [-Wunused-but-set-variable]
    u32 val;
    ^
    4 warnings generated.


    vim +/val +89 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c

    82
    83 static void hisi_hha_pmu_config_ds(struct perf_event *event)
    84 {
    85 struct hisi_pmu *hha_pmu = to_hisi_pmu(event->pmu);
    86 u32 ds_skt = hisi_get_datasrc_skt(event);
    87
    88 if (ds_skt) {
    > 89 u32 val;
    90
    91 val = readl(hha_pmu->base + HHA_DATSRC_CTRL);
    92 val |= HHA_DATSRC_SKT_EN;
    93 writel(ds_skt, hha_pmu->base + HHA_DATSRC_CTRL);
    94 }
    95 }
    96

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