linux-kernel - arch/powerpc/platforms/powernv/opal-fadump.c:42:33: sparse: sparse: incorrect type in assignment (different base types)

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Date:   Sat, 8 Aug 2020 19:32:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hari Bathini <hbathini@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/platforms/powernv/opal-fadump.c:42:33: sparse: sparse:
 incorrect type in assignment (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   449dc8c97089a6e09fb2dac4d92b1b7ac0eb7c1e
commit: 742a265accd3e3afcc8e7b17f409c93c1de8be85 powerpc/fadump: register kernel metadata address with opal
date:   11 months ago
config: powerpc64-randconfig-s032-20200808 (attached as .config)
compiler: powerpc64-linux-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: v0.6.2-118-ge1578773-dirty
        git checkout 742a265accd3e3afcc8e7b17f409c93c1de8be85
        # 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=powerpc64 

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 >>)

>> arch/powerpc/platforms/powernv/opal-fadump.c:42:33: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] dest @@     got unsigned long long [usertype] addr @@
>> arch/powerpc/platforms/powernv/opal-fadump.c:42:33: sparse:     expected restricted __be64 [usertype] dest
>> arch/powerpc/platforms/powernv/opal-fadump.c:42:33: sparse:     got unsigned long long [usertype] addr
   arch/powerpc/platforms/powernv/opal-fadump.c:43:33: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] size @@     got unsigned long boot_memory_size @@
>> arch/powerpc/platforms/powernv/opal-fadump.c:43:33: sparse:     expected restricted __be64 [usertype] size
   arch/powerpc/platforms/powernv/opal-fadump.c:43:33: sparse:     got unsigned long boot_memory_size
>> arch/powerpc/platforms/powernv/opal-fadump.c:50:53: sparse: sparse: restricted __be64 degrades to integer

vim +42 arch/powerpc/platforms/powernv/opal-fadump.c

    32	
    33	static u64 opal_fadump_init_mem_struct(struct fw_dump *fadump_conf)
    34	{
    35		u64 addr = fadump_conf->reserve_dump_area_start;
    36	
    37		opal_fdm = __va(fadump_conf->kernel_metadata);
    38		opal_fadump_init_metadata(opal_fdm);
    39	
    40		opal_fdm->region_cnt = 1;
    41		opal_fdm->rgn[0].src	= 0;
  > 42		opal_fdm->rgn[0].dest	= addr;
  > 43		opal_fdm->rgn[0].size	= fadump_conf->boot_memory_size;
    44		addr += fadump_conf->boot_memory_size;
    45	
    46		/*
    47		 * Kernel metadata is passed to f/w and retrieved in capture kerenl.
    48		 * So, use it to save fadump header address instead of calculating it.
    49		 */
  > 50		opal_fdm->fadumphdr_addr = (opal_fdm->rgn[0].dest +
    51					    fadump_conf->boot_memory_size);
    52	
    53		return addr;
    54	}
    55	

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

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