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Message-ID: <202312190208.xrAsnOMZ-lkp@intel.com>
Date: Tue, 19 Dec 2023 02:45:40 +0800
From: kernel test robot <lkp@...el.com>
To: Alastair D'Silva <alastair@...ilva.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Michael Ellerman <mpe@...erman.id.au>, Greg Kurz <groug@...d.org>
Subject: drivers/misc/ocxl/mmio.c:20:34: sparse: sparse: cast removes address
 space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ceb6a6f023fd3e8b07761ed900352ef574010bcb
commit: 7e462c2a8a6d00d3c240cac9f5626eff96d8e641 ocxl: Provide global MMIO accessors for external drivers
date:   4 years, 8 months ago
config: powerpc64-randconfig-r113-20231118 (https://download.01.org/0day-ci/archive/20231219/202312190208.xrAsnOMZ-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231219/202312190208.xrAsnOMZ-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312190208.xrAsnOMZ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/misc/ocxl/mmio.c:20:34: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/misc/ocxl/mmio.c:20:62: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:20:62: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:20:62: sparse:     got char *
   drivers/misc/ocxl/mmio.c:24:31: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:24:59: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:24:59: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:24:59: sparse:     got char *
   drivers/misc/ocxl/mmio.c:45:34: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:45:62: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:45:62: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:45:62: sparse:     got char *
   drivers/misc/ocxl/mmio.c:49:31: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:49:59: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:49:59: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:49:59: sparse:     got char *
   drivers/misc/ocxl/mmio.c:70:33: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/misc/ocxl/mmio.c:70:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:70:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:70:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:74:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:74:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:74:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:74:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:96:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:96:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:96:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:96:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:100:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:100:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:100:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:100:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:124:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:124:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:124:61: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:124:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:126:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:126:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:126:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:126:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:130:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:130:58: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:130:58: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:130:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:132:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:132:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:132:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:132:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:155:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:155:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:155:61: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:155:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:157:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:157:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:157:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:157:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:161:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:161:58: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:161:58: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:161:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:163:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:163:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:163:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:163:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:186:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:186:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:186:61: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:186:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:188:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:188:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:188:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:188:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:192:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:192:58: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:192:58: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:192:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:194:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:194:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:194:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:194:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:218:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:218:61: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:218:61: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:218:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:220:33: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:220:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:220:61: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:220:61: sparse:     got char *
   drivers/misc/ocxl/mmio.c:224:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:224:58: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:224:58: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:224:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:226:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:226:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:226:58: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:226:58: sparse:     got char *
   drivers/misc/ocxl/mmio.c:230:22: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/misc/ocxl/mmio.c:230:50: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got char * @@
   drivers/misc/ocxl/mmio.c:230:50: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/misc/ocxl/mmio.c:230:50: sparse:     got char *
   drivers/misc/ocxl/mmio.c: note: in included file (through include/linux/io.h, include/linux/irq.h, arch/powerpc/include/asm/hardirq.h, ...):
   arch/powerpc/include/asm/io.h:157:1: sparse: sparse: dereference of noderef expression
   arch/powerpc/include/asm/io.h:162:1: sparse: sparse: dereference of noderef expression
   arch/powerpc/include/asm/io.h:157:1: sparse: sparse: dereference of noderef expression
   arch/powerpc/include/asm/io.h:162:1: sparse: sparse: dereference of noderef expression
   arch/powerpc/include/asm/io.h:157:1: sparse: sparse: dereference of noderef expression
   arch/powerpc/include/asm/io.h:162:1: sparse: sparse: dereference of noderef expression

vim +/__iomem +20 drivers/misc/ocxl/mmio.c

    17	
    18		switch (endian) {
    19		case OCXL_BIG_ENDIAN:
  > 20			*val = readl_be((char *)afu->global_mmio_ptr + offset);
    21			break;
    22	
    23		default:
    24			*val = readl((char *)afu->global_mmio_ptr + offset);
    25			break;
    26		}
    27	
    28		return 0;
    29	}
    30	EXPORT_SYMBOL_GPL(ocxl_global_mmio_read32);
    31	
    32	int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset,
    33					enum ocxl_endian endian, u64 *val)
    34	{
    35		if (offset > afu->config.global_mmio_size - 8)
    36			return -EINVAL;
    37	
    38	#ifdef __BIG_ENDIAN__
    39		if (endian == OCXL_HOST_ENDIAN)
    40			endian = OCXL_BIG_ENDIAN;
    41	#endif
    42	
    43		switch (endian) {
    44		case OCXL_BIG_ENDIAN:
    45			*val = readq_be((char *)afu->global_mmio_ptr + offset);
    46			break;
    47	
    48		default:
    49			*val = readq((char *)afu->global_mmio_ptr + offset);
    50			break;
    51		}
    52	
    53		return 0;
    54	}
    55	EXPORT_SYMBOL_GPL(ocxl_global_mmio_read64);
    56	
    57	int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset,
    58					enum ocxl_endian endian, u32 val)
    59	{
    60		if (offset > afu->config.global_mmio_size - 4)
    61			return -EINVAL;
    62	
    63	#ifdef __BIG_ENDIAN__
    64		if (endian == OCXL_HOST_ENDIAN)
    65			endian = OCXL_BIG_ENDIAN;
    66	#endif
    67	
    68		switch (endian) {
    69		case OCXL_BIG_ENDIAN:
  > 70			writel_be(val, (char *)afu->global_mmio_ptr + offset);
    71			break;
    72	
    73		default:
    74			writel(val, (char *)afu->global_mmio_ptr + offset);
    75			break;
    76		}
    77	
    78	
    79		return 0;
    80	}
    81	EXPORT_SYMBOL_GPL(ocxl_global_mmio_write32);
    82	

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

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