linux-kernel - drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c:96:50: sparse: sparse: cast removes address space '_

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Message-ID: <202102031222.6ynOjuJI-lkp@intel.com>
Date:   Wed, 3 Feb 2021 12:53:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c:96:50:
 sparse: sparse: cast removes address space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3aaf0a27ffc29b19a62314edd684b9bc6346f9a8
commit: a5923b6c3137b9d4fc2ea1c997f6e4d51ac5d774 thermal: int340x: processor_thermal: Refactor MMIO interface
date:   8 weeks ago
config: x86_64-randconfig-s032-20210203 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a5923b6c3137b9d4fc2ea1c997f6e4d51ac5d774
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a5923b6c3137b9d4fc2ea1c997f6e4d51ac5d774
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c:96:50: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c:100:36: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +96 drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c

    81	
    82	int proc_thermal_rapl_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
    83	{
    84		const struct rapl_mmio_regs *rapl_regs = &rapl_mmio_default;
    85		enum rapl_domain_reg_id reg;
    86		enum rapl_domain_type domain;
    87		int ret;
    88	
    89		if (!rapl_regs)
    90			return 0;
    91	
    92		for (domain = RAPL_DOMAIN_PACKAGE; domain < RAPL_DOMAIN_MAX; domain++) {
    93			for (reg = RAPL_DOMAIN_REG_LIMIT; reg < RAPL_DOMAIN_REG_MAX; reg++)
    94				if (rapl_regs->regs[domain][reg])
    95					rapl_mmio_priv.regs[domain][reg] =
  > 96							(u64)proc_priv->mmio_base +
    97							rapl_regs->regs[domain][reg];
    98			rapl_mmio_priv.limits[domain] = rapl_regs->limits[domain];
    99		}
   100		rapl_mmio_priv.reg_unit = (u64)proc_priv->mmio_base + rapl_regs->reg_unit;
   101	
   102		rapl_mmio_priv.read_raw = rapl_mmio_read_raw;
   103		rapl_mmio_priv.write_raw = rapl_mmio_write_raw;
   104	
   105		rapl_mmio_priv.control_type = powercap_register_control_type(NULL, "intel-rapl-mmio", NULL);
   106		if (IS_ERR(rapl_mmio_priv.control_type)) {
   107			pr_debug("failed to register powercap control_type.\n");
   108			return PTR_ERR(rapl_mmio_priv.control_type);
   109		}
   110	
   111		ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powercap/rapl:online",
   112					rapl_mmio_cpu_online, rapl_mmio_cpu_down_prep);
   113		if (ret < 0) {
   114			powercap_unregister_control_type(rapl_mmio_priv.control_type);
   115			rapl_mmio_priv.control_type = NULL;
   116			return ret;
   117		}
   118		rapl_mmio_priv.pcap_rapl_online = ret;
   119	
   120		return 0;
   121	}
   122	EXPORT_SYMBOL_GPL(proc_thermal_rapl_add);
   123	

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

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