linux-kernel - drivers/remoteproc/rcar_rproc.c:45:20: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Wed, 2 Nov 2022 10:56:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Vineet Gupta <vgupta@...nel.org>
Subject: drivers/remoteproc/rcar_rproc.c:45:20: sparse: sparse: incorrect
 type in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8f71a2b3f435f29b787537d1abedaa7d8ebe6647
commit: c44f15c1c09481d50fd33478ebb5b8284f8f5edb arc: iounmap() arg is volatile
date:   2 weeks ago
config: arc-randconfig-s033-20221102
compiler: arceb-elf-gcc (GCC) 12.1.0
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: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c44f15c1c09481d50fd33478ebb5b8284f8f5edb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c44f15c1c09481d50fd33478ebb5b8284f8f5edb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc SHELL=/bin/bash drivers/remoteproc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

sparse warnings: (new ones prefixed by >>)
   drivers/remoteproc/rcar_rproc.c:28:12: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *va @@     got void [noderef] __iomem * @@
   drivers/remoteproc/rcar_rproc.c:28:12: sparse:     expected void *va
   drivers/remoteproc/rcar_rproc.c:28:12: sparse:     got void [noderef] __iomem *
>> drivers/remoteproc/rcar_rproc.c:45:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got void *va @@
   drivers/remoteproc/rcar_rproc.c:45:20: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/remoteproc/rcar_rproc.c:45:20: sparse:     got void *va

vim +45 drivers/remoteproc/rcar_rproc.c

285892a74f1370 Julien Massot 2021-12-07  20  
285892a74f1370 Julien Massot 2021-12-07  21  static int rcar_rproc_mem_alloc(struct rproc *rproc,
285892a74f1370 Julien Massot 2021-12-07  22  				 struct rproc_mem_entry *mem)
285892a74f1370 Julien Massot 2021-12-07  23  {
285892a74f1370 Julien Massot 2021-12-07  24  	struct device *dev = &rproc->dev;
285892a74f1370 Julien Massot 2021-12-07  25  	void *va;
285892a74f1370 Julien Massot 2021-12-07  26  
285892a74f1370 Julien Massot 2021-12-07  27  	dev_dbg(dev, "map memory: %pa+%zx\n", &mem->dma, mem->len);
285892a74f1370 Julien Massot 2021-12-07 @28  	va = ioremap_wc(mem->dma, mem->len);
285892a74f1370 Julien Massot 2021-12-07  29  	if (!va) {
285892a74f1370 Julien Massot 2021-12-07  30  		dev_err(dev, "Unable to map memory region: %pa+%zx\n",
285892a74f1370 Julien Massot 2021-12-07  31  			&mem->dma, mem->len);
285892a74f1370 Julien Massot 2021-12-07  32  		return -ENOMEM;
285892a74f1370 Julien Massot 2021-12-07  33  	}
285892a74f1370 Julien Massot 2021-12-07  34  
285892a74f1370 Julien Massot 2021-12-07  35  	/* Update memory entry va */
285892a74f1370 Julien Massot 2021-12-07  36  	mem->va = va;
285892a74f1370 Julien Massot 2021-12-07  37  
285892a74f1370 Julien Massot 2021-12-07  38  	return 0;
285892a74f1370 Julien Massot 2021-12-07  39  }
285892a74f1370 Julien Massot 2021-12-07  40  
285892a74f1370 Julien Massot 2021-12-07  41  static int rcar_rproc_mem_release(struct rproc *rproc,
285892a74f1370 Julien Massot 2021-12-07  42  				   struct rproc_mem_entry *mem)
285892a74f1370 Julien Massot 2021-12-07  43  {
285892a74f1370 Julien Massot 2021-12-07  44  	dev_dbg(&rproc->dev, "unmap memory: %pa\n", &mem->dma);
285892a74f1370 Julien Massot 2021-12-07 @45  	iounmap(mem->va);
285892a74f1370 Julien Massot 2021-12-07  46  
285892a74f1370 Julien Massot 2021-12-07  47  	return 0;
285892a74f1370 Julien Massot 2021-12-07  48  }
285892a74f1370 Julien Massot 2021-12-07  49  

:::::: The code at line 45 was first introduced by commit
:::::: 285892a74f1370a12249f765c6a4e3b16194852e remoteproc: Add Renesas rcar driver

:::::: TO: Julien Massot <julien.massot@....bzh>
:::::: CC: Mathieu Poirier <mathieu.poirier@...aro.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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