[linux-next:master 2888/4669] drivers/mtd/maps/uclinux.c:58:15: sparse: sparse: incorrect type in assignment (different address spaces)

[linux-next:master 2888/4669] drivers/mtd/maps/uclinux.c:58:15: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   b9810cd75b9fb56a3425d391cba3f608502bd474
commit: 2b533e775aec580cf60074417f4ca00ac9cf3580 [2888/4669] Revert "mtd: maps: remove uclinux map driver"
config: riscv-randconfig-r122-20260709 (https://download.01.org/0day-ci/archive/20260710/202607100227.esCbqJWc-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 14.3.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260710/202607100227.esCbqJWc-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/202607100227.esCbqJWc-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mtd/maps/uclinux.c:58:15: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void * @@     got void [noderef] __iomem * @@
   drivers/mtd/maps/uclinux.c:58:15: sparse:     expected void *
   drivers/mtd/maps/uclinux.c:58:15: sparse:     got void [noderef] __iomem *
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
   drivers/mtd/maps/uclinux.c:80:30: sparse: sparse: cast to restricted __be32
>> drivers/mtd/maps/uclinux.c:92:20: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *virt @@     got void * @@
   drivers/mtd/maps/uclinux.c:92:20: sparse:     expected void [noderef] __iomem *virt
   drivers/mtd/maps/uclinux.c:92:20: sparse:     got void *
>> drivers/mtd/maps/uclinux.c:94:27: sparse: sparse: Using plain integer as NULL pointer

vim +58 drivers/mtd/maps/uclinux.c

    53	
    54	static int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
    55		size_t *retlen, void **virt, resource_size_t *phys)
    56	{
    57		struct map_info *map = mtd->priv;
  > 58		*virt = map->virt + from;
    59		if (phys)
    60			*phys = map->phys + from;
    61		*retlen = len;
    62		return(0);
    63	}
    64	
    65	/****************************************************************************/
    66	
    67	static int __init uclinux_mtd_init(void)
    68	{
    69		struct mtd_info *mtd;
    70		struct map_info *mapp;
    71	
    72		mapp = &uclinux_ram_map;
    73	
    74		if (physaddr == -1)
    75			mapp->phys = (resource_size_t)__bss_stop;
    76		else
    77			mapp->phys = physaddr;
    78	
    79		if (!mapp->size)
    80			mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8))));
    81		mapp->bankwidth = 4;
    82	
    83		printk("uclinux[mtd]: probe address=0x%x size=0x%x\n",
    84		       	(int) mapp->phys, (int) mapp->size);
    85	
    86		/*
    87		 * The filesystem is guaranteed to be in direct mapped memory. It is
    88		 * directly following the kernels own bss region. Following the same
    89		 * mechanism used by architectures setting up traditional initrds we
    90		 * use phys_to_virt to get the virtual address of its start.
    91		 */
  > 92		mapp->virt = phys_to_virt(mapp->phys);
    93	
  > 94		if (mapp->virt == 0) {
    95			printk("uclinux[mtd]: no virtual mapping?\n");
    96			return(-EIO);
    97		}
    98	
    99		simple_map_init(mapp);
   100	
   101		mtd = do_map_probe("map_" MAP_NAME, mapp);
   102		if (!mtd) {
   103			printk("uclinux[mtd]: failed to find a mapping?\n");
   104			return(-ENXIO);
   105		}
   106	
   107		mtd->owner = THIS_MODULE;
   108		mtd->_point = uclinux_point;
   109		mtd->priv = mapp;
   110	
   111		uclinux_ram_mtdinfo = mtd;
   112		mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);
   113	
   114		return(0);
   115	}
   116	device_initcall(uclinux_mtd_init);
   117	

--
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