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Date:   Tue, 18 Aug 2020 20:07:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/mtd/devices/pmc551.c:783:53: sparse: sparse: incorrect type
 in argument 2 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd
commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces
date:   9 weeks ago
config: arm-randconfig-s032-20200818 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.2-180-g49f7e13a-dirty
        git checkout 670d0a4b10704667765f7d18f7592993d02783aa
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

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/mtd/devices/pmc551.c:743:29: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned char [usertype] *start @@     got void [noderef] __iomem * @@
   drivers/mtd/devices/pmc551.c:743:29: sparse:     expected unsigned char [usertype] *start
   drivers/mtd/devices/pmc551.c:743:29: sparse:     got void [noderef] __iomem *
>> drivers/mtd/devices/pmc551.c:783:53: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got unsigned char [usertype] *start @@
>> drivers/mtd/devices/pmc551.c:783:53: sparse:     expected void [noderef] __iomem *addr
   drivers/mtd/devices/pmc551.c:783:53: sparse:     got unsigned char [usertype] *start
   drivers/mtd/devices/pmc551.c:833:52: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got unsigned char [usertype] *start @@
   drivers/mtd/devices/pmc551.c:833:52: sparse:     expected void [noderef] __iomem *addr
   drivers/mtd/devices/pmc551.c:833:52: sparse:     got unsigned char [usertype] *start

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=670d0a4b10704667765f7d18f7592993d02783aa
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 670d0a4b10704667765f7d18f7592993d02783aa
vim +783 drivers/mtd/devices/pmc551.c

^1da177e4c3f41 Linus Torvalds      2005-04-16  767  
^1da177e4c3f41 Linus Torvalds      2005-04-16  768  		mtd->size = msize;
^1da177e4c3f41 Linus Torvalds      2005-04-16  769  		mtd->flags = MTD_CAP_RAM;
3c3c10bba1e4cc Artem Bityutskiy    2012-01-30  770  		mtd->_erase = pmc551_erase;
3c3c10bba1e4cc Artem Bityutskiy    2012-01-30  771  		mtd->_read = pmc551_read;
3c3c10bba1e4cc Artem Bityutskiy    2012-01-30  772  		mtd->_write = pmc551_write;
3c3c10bba1e4cc Artem Bityutskiy    2012-01-30  773  		mtd->_point = pmc551_point;
3c3c10bba1e4cc Artem Bityutskiy    2012-01-30  774  		mtd->_unpoint = pmc551_unpoint;
^1da177e4c3f41 Linus Torvalds      2005-04-16  775  		mtd->type = MTD_RAM;
^1da177e4c3f41 Linus Torvalds      2005-04-16  776  		mtd->name = "PMC551 RAM board";
^1da177e4c3f41 Linus Torvalds      2005-04-16  777  		mtd->erasesize = 0x10000;
17ffc7ba6d7ea6 Artem B. Bityutskiy 2006-06-22  778  		mtd->writesize = 1;
^1da177e4c3f41 Linus Torvalds      2005-04-16  779  		mtd->owner = THIS_MODULE;
^1da177e4c3f41 Linus Torvalds      2005-04-16  780  
ee0e87b174bb41 Jamie Iles          2011-05-23  781  		if (mtd_device_register(mtd, NULL, 0)) {
8e0aedc5bcb9da David Woodhouse     2007-06-29  782  			printk(KERN_NOTICE "pmc551: Failed to register new device\n");
98aacdfde05ccf Jiri Slaby          2006-09-19 @783  			pci_iounmap(PCI_Device, priv->start);
^1da177e4c3f41 Linus Torvalds      2005-04-16  784  			kfree(mtd->priv);
^1da177e4c3f41 Linus Torvalds      2005-04-16  785  			kfree(mtd);
^1da177e4c3f41 Linus Torvalds      2005-04-16  786  			break;
^1da177e4c3f41 Linus Torvalds      2005-04-16  787  		}
dd8e9ed6ed544e Alan Cox            2006-09-22  788  
ee0e87b174bb41 Jamie Iles          2011-05-23  789  		/* Keep a reference as the mtd_device_register worked */
dd8e9ed6ed544e Alan Cox            2006-09-22  790  		pci_dev_get(PCI_Device);
dd8e9ed6ed544e Alan Cox            2006-09-22  791  
^1da177e4c3f41 Linus Torvalds      2005-04-16  792  		printk(KERN_NOTICE "Registered pmc551 memory device.\n");
8e0aedc5bcb9da David Woodhouse     2007-06-29  793  		printk(KERN_NOTICE "Mapped %dMiB of memory from 0x%p to 0x%p\n",
^1da177e4c3f41 Linus Torvalds      2005-04-16  794  			priv->asize >> 20,
cdf0a7d1698085 Jiri Slaby          2006-09-19  795  			priv->start, priv->start + priv->asize);
8e0aedc5bcb9da David Woodhouse     2007-06-29  796  		printk(KERN_NOTICE "Total memory is %d%sB\n",
^1da177e4c3f41 Linus Torvalds      2005-04-16  797  			(length < 1024) ? length :
^1da177e4c3f41 Linus Torvalds      2005-04-16  798  			(length < 1048576) ? length >> 10 : length >> 20,
8e0aedc5bcb9da David Woodhouse     2007-06-29  799  			(length < 1024) ? "" : (length < 1048576) ? "Ki" : "Mi");
^1da177e4c3f41 Linus Torvalds      2005-04-16  800  		priv->nextpmc551 = pmc551list;
^1da177e4c3f41 Linus Torvalds      2005-04-16  801  		pmc551list = mtd;
^1da177e4c3f41 Linus Torvalds      2005-04-16  802  		found++;
^1da177e4c3f41 Linus Torvalds      2005-04-16  803  	}
^1da177e4c3f41 Linus Torvalds      2005-04-16  804  
dd8e9ed6ed544e Alan Cox            2006-09-22  805  	/* Exited early, reference left over */
dd8e9ed6ed544e Alan Cox            2006-09-22  806  	pci_dev_put(PCI_Device);
dd8e9ed6ed544e Alan Cox            2006-09-22  807  
^1da177e4c3f41 Linus Torvalds      2005-04-16  808  	if (!pmc551list) {
^1da177e4c3f41 Linus Torvalds      2005-04-16  809  		printk(KERN_NOTICE "pmc551: not detected\n");
^1da177e4c3f41 Linus Torvalds      2005-04-16  810  		return -ENODEV;
^1da177e4c3f41 Linus Torvalds      2005-04-16  811  	} else {
^1da177e4c3f41 Linus Torvalds      2005-04-16  812  		printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
^1da177e4c3f41 Linus Torvalds      2005-04-16  813  		return 0;
^1da177e4c3f41 Linus Torvalds      2005-04-16  814  	}
^1da177e4c3f41 Linus Torvalds      2005-04-16  815  }
^1da177e4c3f41 Linus Torvalds      2005-04-16  816  

:::::: The code at line 783 was first introduced by commit
:::::: 98aacdfde05ccf512d4395eed0d4894eea2d163c [MTD] pmc551 pci cleanup

:::::: TO: Jiri Slaby <jirislaby@...il.com>
:::::: CC: David Woodhouse <dwmw2@...radead.org>

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

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