[PATCH] ACPI: fix the warning reported by the sparse

[kernel test robot]

Hi Yunhui,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/bleeding-edge arm64/for-next/core soc/for-next linus/master arm/for-next arm/fixes v6.12-rc5 next-20241101]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yunhui-Cui/ACPI-fix-the-warning-reported-by-the-sparse/20241031-192215
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20241031112030.72647-1-cuiyunhui%40bytedance.com
patch subject: [PATCH] ACPI: fix the warning reported by the sparse
config: loongarch-randconfig-r112-20241102 (https://download.01.org/0day-ci/archive/20241102/202411020935.IEiVDiTL-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20241102/202411020935.IEiVDiTL-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411020935.IEiVDiTL-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/loongarch/kernel/acpi.c:43:30: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void * @@     got void [noderef] __iomem * @@
   arch/loongarch/kernel/acpi.c:43:30: sparse:     expected void *
   arch/loongarch/kernel/acpi.c:43:30: sparse:     got void [noderef] __iomem *
   arch/loongarch/kernel/acpi.c:206:40: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_w'

vim +43 arch/loongarch/kernel/acpi.c

628c3bb40e9a8ce Huacai Chen 2022-05-31  21  
628c3bb40e9a8ce Huacai Chen 2022-05-31  22  int acpi_disabled;
628c3bb40e9a8ce Huacai Chen 2022-05-31  23  EXPORT_SYMBOL(acpi_disabled);
628c3bb40e9a8ce Huacai Chen 2022-05-31  24  int acpi_noirq;
628c3bb40e9a8ce Huacai Chen 2022-05-31  25  int acpi_pci_disabled;
628c3bb40e9a8ce Huacai Chen 2022-05-31  26  EXPORT_SYMBOL(acpi_pci_disabled);
628c3bb40e9a8ce Huacai Chen 2022-05-31  27  int acpi_strict = 1; /* We have no workarounds on LoongArch */
628c3bb40e9a8ce Huacai Chen 2022-05-31 @28  int num_processors;
628c3bb40e9a8ce Huacai Chen 2022-05-31  29  int disabled_cpus;
628c3bb40e9a8ce Huacai Chen 2022-05-31  30  
628c3bb40e9a8ce Huacai Chen 2022-05-31  31  u64 acpi_saved_sp;
628c3bb40e9a8ce Huacai Chen 2022-05-31  32  
628c3bb40e9a8ce Huacai Chen 2022-05-31  33  #define PREFIX			"ACPI: "
628c3bb40e9a8ce Huacai Chen 2022-05-31  34  
4551b30525cf3d2 Huacai Chen 2024-02-06  35  struct acpi_madt_core_pic acpi_core_pic[MAX_CORE_PIC];
f6f0c9a74a48448 Huacai Chen 2023-06-29  36  
4802318a3cea8b3 Yunhui Cui  2024-10-31  37  void __init *__acpi_map_table(unsigned long phys, unsigned long size)
628c3bb40e9a8ce Huacai Chen 2022-05-31  38  {
628c3bb40e9a8ce Huacai Chen 2022-05-31  39  
628c3bb40e9a8ce Huacai Chen 2022-05-31  40  	if (!phys || !size)
628c3bb40e9a8ce Huacai Chen 2022-05-31  41  		return NULL;
628c3bb40e9a8ce Huacai Chen 2022-05-31  42  
628c3bb40e9a8ce Huacai Chen 2022-05-31 @43  	return early_memremap(phys, size);
628c3bb40e9a8ce Huacai Chen 2022-05-31  44  }
628c3bb40e9a8ce Huacai Chen 2022-05-31  45  void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
628c3bb40e9a8ce Huacai Chen 2022-05-31  46  {
628c3bb40e9a8ce Huacai Chen 2022-05-31  47  	if (!map || !size)
628c3bb40e9a8ce Huacai Chen 2022-05-31  48  		return;
628c3bb40e9a8ce Huacai Chen 2022-05-31  49  
628c3bb40e9a8ce Huacai Chen 2022-05-31  50  	early_memunmap(map, size);
628c3bb40e9a8ce Huacai Chen 2022-05-31  51  }
628c3bb40e9a8ce Huacai Chen 2022-05-31  52  

-- 
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