[tobetter:odroid-6.6.y 41/82] drivers/char/aml-gpiomem.c:129:22: error: call to undeclared function 'phys_mem_access_prot'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/tobetter/linux odroid-6.6.y
head:   c970a63609188f53cf758a3dcd395e777150a29a
commit: 5e7a0fcf547e3b4f54e37972019abef8e78192a7 [41/82] ODROID-N2/C4: char: Add /dev/gpiomem device
config: s390-randconfig-002-20240907 (https://download.01.org/0day-ci/archive/20240908/202409080228.5faeeBw8-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240908/202409080228.5faeeBw8-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409080228.5faeeBw8-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/char/aml-gpiomem.c:55:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
                                                             ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
   #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
                                                        ^
   In file included from drivers/char/aml-gpiomem.c:55:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
                                                             ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
   #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
                                                        ^
   In file included from drivers/char/aml-gpiomem.c:55:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsb(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsw(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsl(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesb(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesw(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
>> drivers/char/aml-gpiomem.c:129:22: error: call to undeclared function 'phys_mem_access_prot'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
           vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
                               ^
   drivers/char/aml-gpiomem.c:129:20: error: assigning to 'pgprot_t' from incompatible type 'int'
           vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
                             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   12 warnings and 2 errors generated.


vim +/phys_mem_access_prot +129 drivers/char/aml-gpiomem.c

   112	
   113	static int aml_gpiomem_mmap(struct file *file, struct vm_area_struct *vma)
   114	{
   115		int gpio_area = 0;
   116		unsigned long start = vma->vm_pgoff << PAGE_SHIFT;
   117		unsigned long end   = start + vma->vm_end - vma->vm_start;
   118	
   119		while (gpio_area < inst->gpio_area_count) {
   120			if ((inst->gpio_regs_phys[gpio_area].start >= start) &&
   121			    (inst->gpio_regs_phys[gpio_area].end   <= end))
   122				goto found;
   123			gpio_area++;
   124		}
   125	
   126		return -EACCES;
   127	
   128	found:
 > 129		vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
   130				vma->vm_end - vma->vm_start,
   131				vma->vm_page_prot);
   132	
   133		vma->vm_ops = &aml_gpiomem_vm_ops;
   134	
   135		if (remap_pfn_range(vma, vma->vm_start,
   136					vma->vm_pgoff,
   137					vma->vm_end - vma->vm_start,
   138					vma->vm_page_prot)) {
   139			return -EAGAIN;
   140		}
   141	
   142		return 0;
   143	}
   144	

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