linux-kernel - [tobetter:odroid-5.16.y 20/75] drivers/char/exynos-gpiomem.c:121:22: error: implicit declaration of function 'phys_mem_access

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Date:   Thu, 9 Dec 2021 05:40:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Brian Kim <brian.kim@...dkernel.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Dongjin Kim <tobetter@...il.com>,
        memeka <mihailescu2m@...il.com>, Yang Deokgyu <secugyu@...il.com>
Subject: [tobetter:odroid-5.16.y 20/75] drivers/char/exynos-gpiomem.c:121:22:
 error: implicit declaration of function 'phys_mem_access_prot'

tree:   https://github.com/tobetter/linux odroid-5.16.y
head:   04f296b5f991198f16f76ba15a23e9e00e30aac4
commit: 6720769118c835b66f65eb40c2d476fd615d9549 [20/75] ODROID-XU4: char: exynos: add /dev/gpiomem device for rootless user GPIO access
config: hexagon-randconfig-r021-20211207 (https://download.01.org/0day-ci/archive/20211209/202112090524.JyN1VmD0-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/tobetter/linux/commit/6720769118c835b66f65eb40c2d476fd615d9549
        git remote add tobetter https://github.com/tobetter/linux
        git fetch --no-tags tobetter odroid-5.16.y
        git checkout 6720769118c835b66f65eb40c2d476fd615d9549
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/char/

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

All errors (new ones prefixed by >>):

>> drivers/char/exynos-gpiomem.c:121:22: error: implicit declaration of function 'phys_mem_access_prot' [-Werror,-Wimplicit-function-declaration]
           vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
                               ^
>> drivers/char/exynos-gpiomem.c:121:20: error: assigning to 'pgprot_t' from incompatible type 'int'
           vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
                             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 errors generated.


vim +/phys_mem_access_prot +121 drivers/char/exynos-gpiomem.c

   106	
   107	static int exynos_gpiomem_mmap(struct file *file, struct vm_area_struct *vma)
   108	{
   109		int gpio_area = 0;
   110	
   111		while (gpio_area < inst->gpio_area_count) {
   112			if ((inst->gpio_regs_phys[gpio_area] >> PAGE_SHIFT) == vma->vm_pgoff)
   113				goto found;
   114	
   115			gpio_area++;
   116		}
   117	
   118		return -EACCES;
   119	
   120	found:
 > 121		vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
   122				PAGE_SIZE,
   123				vma->vm_page_prot);
   124	
   125		vma->vm_ops = &exynos_gpiomem_vm_ops;
   126	
   127		if (remap_pfn_range(vma, vma->vm_start,
   128					vma->vm_pgoff,
   129					PAGE_SIZE,
   130					vma->vm_page_prot)) {
   131			return -EAGAIN;
   132		}
   133	
   134		return 0;
   135	}
   136	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org