linux-kernel - include/linux/platform_device.h:91:23: sparse: sparse: incorrect type in return expression (different address spaces)

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Message-ID: <202506141507.mLBNmMsd-lkp@intel.com>
Date: Sat, 14 Jun 2025 15:36:19 +0800
From: kernel test robot <lkp@...el.com>
To: Andrew Davis <afd@...com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <krzk@...nel.org>
Subject: include/linux/platform_device.h:91:23: sparse: sparse: incorrect
 type in return expression (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4774cfe3543abb8ee98089f535e28ebfd45b975a
commit: 61de83fd8256e185588670d3cf0bccc3e913819c mux: mmio: Do not use syscon helper to build regmap
date:   6 weeks ago
config: s390-randconfig-r112-20250614 (https://download.01.org/0day-ci/archive/20250614/202506141507.mLBNmMsd-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 8.5.0
reproduce: (https://download.01.org/0day-ci/archive/20250614/202506141507.mLBNmMsd-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506141507.mLBNmMsd-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/mux/mmio.c: note: in included file:
>> include/linux/platform_device.h:91:23: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __iomem * @@     got void * @@
   include/linux/platform_device.h:91:23: sparse:     expected void [noderef] __iomem *
   include/linux/platform_device.h:91:23: sparse:     got void *

vim +91 include/linux/platform_device.h

a0c74f6c9ea9ceb Mark Brown 2023-07-18  85  
a0c74f6c9ea9ceb Mark Brown 2023-07-18  86  
a0c74f6c9ea9ceb Mark Brown 2023-07-18  87  static inline void __iomem *
a0c74f6c9ea9ceb Mark Brown 2023-07-18  88  devm_platform_ioremap_resource(struct platform_device *pdev,
a0c74f6c9ea9ceb Mark Brown 2023-07-18  89  			       unsigned int index)
a0c74f6c9ea9ceb Mark Brown 2023-07-18  90  {
a0c74f6c9ea9ceb Mark Brown 2023-07-18 @91  	return ERR_PTR(-EINVAL);
a0c74f6c9ea9ceb Mark Brown 2023-07-18  92  }
a0c74f6c9ea9ceb Mark Brown 2023-07-18  93  

:::::: The code at line 91 was first introduced by commit
:::::: a0c74f6c9ea9cebd7a8f38142bf87e7c12c2905d platform: Provide stubs for !HAS_IOMEM builds

:::::: TO: Mark Brown <broonie@...nel.org>
:::::: CC: Mark Brown <broonie@...nel.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki