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    SubjectRe: [PATCH v4 08/15] Drivers: hv: Introduce per-cpu event ring tail
    Hi Nuno,

    kernel test robot noticed the following build warnings:

    [auto build test WARNING on arnd-asm-generic/master]
    [also build test WARNING on arm64/for-next/core linus/master v6.6-rc3 next-20230929]
    [cannot apply to tip/x86/core]
    [If your patch is applied to the wrong git tree, kindly drop us a note.
    And when submitting patch, we suggest to use '--base' as documented in
    https://git-scm.com/docs/git-format-patch#_base_tree_information]

    url: https://github.com/intel-lab-lkp/linux/commits/Nuno-Das-Neves/hyperv-tlfs-Change-shared-HV_REGISTER_-defines-to-HV_MSR_/20230930-041305
    base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
    patch link: https://lore.kernel.org/r/1696010501-24584-9-git-send-email-nunodasneves%40linux.microsoft.com
    patch subject: [PATCH v4 08/15] Drivers: hv: Introduce per-cpu event ring tail
    config: x86_64-randconfig-123-20230930 (https://download.01.org/0day-ci/archive/20230930/202309301948.CyCE3Y0P-lkp@intel.com/config)
    compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
    reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230930/202309301948.CyCE3Y0P-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 <lkp@intel.com>
    | Closes: https://lore.kernel.org/oe-kbuild-all/202309301948.CyCE3Y0P-lkp@intel.com/

    sparse warnings: (new ones prefixed by >>)
    >> drivers/hv/hv_common.c:98:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __percpu *__pdata @@ got unsigned char [noderef] [usertype] __percpu **extern [addressable] [toplevel] hv_synic_eventring_tail @@
    drivers/hv/hv_common.c:98:21: sparse: expected void [noderef] __percpu *__pdata
    drivers/hv/hv_common.c:98:21: sparse: got unsigned char [noderef] [usertype] __percpu **extern [addressable] [toplevel] hv_synic_eventring_tail
    >> drivers/hv/hv_common.c:349:41: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected unsigned char [noderef] [usertype] __percpu **extern [addressable] [assigned] [toplevel] hv_synic_eventring_tail @@ got unsigned char [usertype] *[noderef] __percpu * @@
    drivers/hv/hv_common.c:349:41: sparse: expected unsigned char [noderef] [usertype] __percpu **extern [addressable] [assigned] [toplevel] hv_synic_eventring_tail
    drivers/hv/hv_common.c:349:41: sparse: got unsigned char [usertype] *[noderef] __percpu *
    >> drivers/hv/hv_common.c:399:55: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned char [noderef] [usertype] __percpu ** @@
    drivers/hv/hv_common.c:399:55: sparse: expected void const [noderef] __percpu *__vpp_verify
    drivers/hv/hv_common.c:399:55: sparse: got unsigned char [noderef] [usertype] __percpu **

    vim +98 drivers/hv/hv_common.c

    74
    75 /*
    76 * Hyper-V specific initialization and shutdown code that is
    77 * common across all architectures. Called from architecture
    78 * specific initialization functions.
    79 */
    80
    81 void __init hv_common_free(void)
    82 {
    83 unregister_sysctl_table(hv_ctl_table_hdr);
    84 hv_ctl_table_hdr = NULL;
    85
    86 if (ms_hyperv.misc_features & HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE)
    87 hv_kmsg_dump_unregister();
    88
    89 kfree(hv_vp_index);
    90 hv_vp_index = NULL;
    91
    92 free_percpu(hyperv_pcpu_output_arg);
    93 hyperv_pcpu_output_arg = NULL;
    94
    95 free_percpu(hyperv_pcpu_input_arg);
    96 hyperv_pcpu_input_arg = NULL;
    97
    > 98 free_percpu(hv_synic_eventring_tail);
    99 hv_synic_eventring_tail = NULL;
    100 }
    101

    --
    0-DAY CI Kernel Test Service
    https://github.com/intel/lkp-tests/wiki

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