linux-kernel - drivers/gpu/drm/tilcdc/tilcdc_regs.h:141:39: sparse: sparse: incorrect type in assignment (different base types)

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Message-ID: <202312010230.nBVReHCy-lkp@intel.com>
Date:   Fri, 1 Dec 2023 02:14:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: drivers/gpu/drm/tilcdc/tilcdc_regs.h:141:39: sparse: sparse:
 incorrect type in assignment (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3b47bc037bd44f142ac09848e8d3ecccc726be99
commit: 62a0d98a188cc4ebd8ea54b37d274ec20465e464 drm: allow to use mmuless SoC
date:   7 years ago
config: arm-randconfig-r123-20231107 (https://download.01.org/0day-ci/archive/20231201/202312010230.nBVReHCy-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231201/202312010230.nBVReHCy-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/202312010230.nBVReHCy-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/gpu/drm/tilcdc/tilcdc_crtc.c: note: in included file:
>> drivers/gpu/drm/tilcdc/tilcdc_regs.h:141:39: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long volatile [usertype] @@     got restricted __le64 [usertype] @@
   drivers/gpu/drm/tilcdc/tilcdc_regs.h:141:39: sparse:     expected unsigned long long volatile [usertype]
   drivers/gpu/drm/tilcdc/tilcdc_regs.h:141:39: sparse:     got restricted __le64 [usertype]

vim +141 drivers/gpu/drm/tilcdc/tilcdc_regs.h

16ea975eac671fa Rob Clark  2013-01-08  130  
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  131  static inline void tilcdc_write64(struct drm_device *dev, u32 reg, u64 data)
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  132  {
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  133  	struct tilcdc_drm_private *priv = dev->dev_private;
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  134  	volatile void __iomem *addr = priv->mmio + reg;
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  135  
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  136  #ifdef iowrite64
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  137  	iowrite64(data, addr);
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  138  #else
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  139  	__iowmb();
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  140  	/* This compiles to strd (=64-bit write) on ARM7 */
7eb9f069ff5dd39 Jyri Sarha 2016-08-26 @141  	*(volatile u64 __force *)addr = __cpu_to_le64(data);
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  142  #endif
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  143  }
7eb9f069ff5dd39 Jyri Sarha 2016-08-26  144  

:::::: The code at line 141 was first introduced by commit
:::::: 7eb9f069ff5dd39d44d7ecdf63eb99b429c7dad0 drm/tilcdc: Write DMA base and ceiling address with single instruction

:::::: TO: Jyri Sarha <jsarha@...com>
:::::: CC: Jyri Sarha <jsarha@...com>

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