linux-kernel - drivers/mtd/nand/raw/sh_flctl.c:510:17: sparse: sparse: incorrect type in assignment (different base types)

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Date:   Sat, 10 Jul 2021 23:51:45 +0800
From:   kernel test robot <lkp@...el.com>
To:     Greg Ungerer <gerg@...ux-m68k.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Subject: drivers/mtd/nand/raw/sh_flctl.c:510:17: sparse: sparse: incorrect
 type in assignment (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   50be9417e23af5a8ac860d998e1e3f06b8fd79d7
commit: 005b73d0dd83c9cb9420a196bea8070cde30ecac m68knommu: __force type casts for raw IO access
date:   12 months ago
config: m68k-randconfig-s031-20210710 (attached as .config)
compiler: m68k-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: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=005b73d0dd83c9cb9420a196bea8070cde30ecac
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 005b73d0dd83c9cb9420a196bea8070cde30ecac
        # 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=m68k 

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/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:456:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:479:26: sparse: sparse: cast to restricted __be32
   drivers/mtd/nand/raw/sh_flctl.c:494:38: sparse: sparse: cast to restricted __be32
>> drivers/mtd/nand/raw/sh_flctl.c:510:17: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int volatile [usertype] @@     got restricted __be32 [usertype] @@
   drivers/mtd/nand/raw/sh_flctl.c:510:17: sparse:     expected unsigned int volatile [usertype]
   drivers/mtd/nand/raw/sh_flctl.c:510:17: sparse:     got restricted __be32 [usertype]
   drivers/mtd/nand/raw/sh_flctl.c:523:24: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __be32 [usertype] @@
   drivers/mtd/nand/raw/sh_flctl.c:523:24: sparse:     expected unsigned long
   drivers/mtd/nand/raw/sh_flctl.c:523:24: sparse:     got restricted __be32 [usertype]

vim +510 drivers/mtd/nand/raw/sh_flctl.c

6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  500  
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  501  static void write_fiforeg(struct sh_flctl *flctl, int rlen,
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  502  						unsigned int offset)
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  503  {
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  504  	int i, len_4align;
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  505  	unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  506  
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  507  	len_4align = (rlen + 3) / 4;
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  508  	for (i = 0; i < len_4align; i++) {
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  509  		wait_wfifo_ready(flctl);
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19 @510  		writel(cpu_to_be32(buf[i]), FLDTFIFO(flctl));
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  511  	}
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  512  }
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  513  

:::::: The code at line 510 was first introduced by commit
:::::: e8a9d8f31c592eea89f1b0d3fd425e7a96944e88 mtd: sh_flctl: Minor cleanups

:::::: TO: Bastian Hecht <hechtb@...glemail.com>
:::::: CC: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>

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

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