linux-kernel - [mchinth: sep_socwatch_linux_5_9 32/41] drivers/platform/x86/sepdk/sep/chap.c:78:39: sparse: sparse: cast removes address space '_

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Message-ID: <202108041546.u6XgX6qE-lkp@intel.com>
Date:   Wed, 4 Aug 2021 15:34:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Manisha Chinthapally <manisha.chinthapally@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Faycal Benmlih <faycal.benmlih@...el.com>
Subject: [mchinth: sep_socwatch_linux_5_9 32/41] drivers/platform/x86/sepdk/sep/chap.c:78:39: sparse: sparse: cast removes address space '__iomem' of expression

tree:   https://github.com/mchinth/linux  sep_socwatch_linux_5_9
head:   7296486889985b9d9895a39f551764a4b0425bea
commit: 4a8adda8065c4c6944ffedd3025605c845c262a5 [32/41] SEP/SOCWATCH resolve build errors after rebasing to linux v5.6-rc3
config: x86_64-randconfig-s022-20210803 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-348-gf0e6938b-dirty
        # https://github.com/mchinth/linux/commit/4a8adda8065c4c6944ffedd3025605c845c262a5
        git remote add mchinth https://github.com/mchinth/linux
        git fetch --no-tags mchinth  sep_socwatch_linux_5_9
        git checkout 4a8adda8065c4c6944ffedd3025605c845c262a5
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/platform/x86/sepdk/pax/ drivers/platform/x86/sepdk/sep/

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/platform/x86/sepdk/sep/chap.c:78:39: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/platform/x86/sepdk/sep/chap.c:90:39: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/platform/x86/sepdk/sep/chap.c:103:39: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +78 drivers/platform/x86/sepdk/sep/chap.c

    44	
    45	/* ------------------------------------------------------------------------- */
    46	/*!
    47	 * @fn          static U32 chap_Init_Chipset(void)
    48	 *
    49	 * @brief       Chipset PMU initialization
    50	 *
    51	 * @param       None
    52	 *
    53	 * @return      VT_SUCCESS if successful, otherwise error
    54	 *
    55	 * <I>Special Notes:</I>
    56	 *             <NONE>
    57	 */
    58	static U32 chap_Init_Chipset(void)
    59	{
    60		U32 i;
    61		CHIPSET_SEGMENT mch_chipset_seg = &CHIPSET_CONFIG_mch(pma);
    62		CHIPSET_SEGMENT ich_chipset_seg = &CHIPSET_CONFIG_ich(pma);
    63		CHIPSET_SEGMENT noa_chipset_seg = &CHIPSET_CONFIG_noa(pma);
    64	
    65		SEP_DRV_LOG_TRACE_IN("");
    66	
    67		SEP_DRV_LOG_TRACE("Initializing chipset ...");
    68	
    69		if (DRV_CONFIG_enable_chipset(drv_cfg)) {
    70			for (i = 0; i < GLOBAL_STATE_num_cpus(driver_state); i++) {
    71				pcb[i].chipset_count_init = TRUE;
    72			}
    73			if ((CHIPSET_CONFIG_mch_chipset(pma)) &&
    74			(CHIPSET_SEGMENT_virtual_address(mch_chipset_seg) == 0)) {
    75				// Map virtual address of PCI CHAP interface
    76				CHIPSET_SEGMENT_virtual_address(
    77					mch_chipset_seg) =
  > 78					(U64)(UIOP)ioremap_cache(
    79						CHIPSET_SEGMENT_physical_address(
    80							mch_chipset_seg),
    81						CHIPSET_SEGMENT_size(
    82							mch_chipset_seg));
    83			}
    84	
    85			if ((CHIPSET_CONFIG_ich_chipset(pma)) &&
    86			(CHIPSET_SEGMENT_virtual_address(ich_chipset_seg) == 0)) {
    87				// Map the virtual address of PCI CHAP interface
    88				CHIPSET_SEGMENT_virtual_address(
    89					ich_chipset_seg) =
    90					(U64)(UIOP)ioremap_cache(
    91						CHIPSET_SEGMENT_physical_address(
    92							ich_chipset_seg),
    93						CHIPSET_SEGMENT_size(
    94							ich_chipset_seg));
    95			}
    96	
    97			// Here we map the MMIO registers for the Gen X processors.
    98			if ((CHIPSET_CONFIG_noa_chipset(pma)) &&
    99			(CHIPSET_SEGMENT_virtual_address(noa_chipset_seg) == 0)) {
   100				// Map the virtual address of PCI CHAP interface
   101				CHIPSET_SEGMENT_virtual_address(
   102					noa_chipset_seg) =
   103					(U64)(UIOP)ioremap_cache(
   104						CHIPSET_SEGMENT_physical_address(
   105							noa_chipset_seg),
   106						CHIPSET_SEGMENT_size(
   107							noa_chipset_seg));
   108			}
   109	
   110			//
   111			// always collect processor events
   112			//
   113			CHIPSET_CONFIG_processor(pma) = 1;
   114		} else {
   115			CHIPSET_CONFIG_processor(pma) = 0;
   116		}
   117		SEP_DRV_LOG_TRACE("Initializing chipset done.");
   118	
   119		SEP_DRV_LOG_TRACE_OUT("");
   120		return VT_SUCCESS;
   121	}
   122	

---
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