[freescale-fslc:pr/639 4345/24603] drivers/vfio/fsl-mc/vfio_fsl_mc.c:360:22: error: incompatible types when assigning to type 'pgprot_t {aka struct pgprot}' from type 'int'

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

tree:   https://github.com/Freescale/linux-fslc pr/639
head:   857fbf7cebaba3b1ffccc558deee1d13ac0e11d7
commit: 053c79cd5d897b39d3659d46370e3b8917f92806 [4345/24603] vfio/fsl-mc: Map the VFIO region according to the flags received from the mc firmware
config: x86_64-buildonly-randconfig-004-20230831 (https://download.01.org/0day-ci/archive/20230901/202309011903.aDagWciI-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230901/202309011903.aDagWciI-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/202309011903.aDagWciI-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/vfio/fsl-mc/vfio_fsl_mc.c: In function 'vfio_fsl_mc_mmap_mmio':
   drivers/vfio/fsl-mc/vfio_fsl_mc.c:360:24: error: implicit declaration of function 'pgprot_cached_ns'; did you mean 'pgprot_noncached'? [-Werror=implicit-function-declaration]
       vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
                           ^~~~~~~~~~~~~~~~
                           pgprot_noncached
>> drivers/vfio/fsl-mc/vfio_fsl_mc.c:360:22: error: incompatible types when assigning to type 'pgprot_t {aka struct pgprot}' from type 'int'
       vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
                         ^
   cc1: some warnings being treated as errors


vim +360 drivers/vfio/fsl-mc/vfio_fsl_mc.c

   344	
   345	static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
   346					 struct vm_area_struct *vma)
   347	{
   348		u64 size = vma->vm_end - vma->vm_start;
   349		u64 pgoff, base;
   350	
   351		pgoff = vma->vm_pgoff &
   352			((1U << (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT)) - 1);
   353		base = pgoff << PAGE_SHIFT;
   354	
   355		if (region.size < PAGE_SIZE || base + size > region.size)
   356			return -EINVAL;
   357	
   358		if (region.type & FSL_MC_REGION_CACHEABLE) {
   359			if (!(region.type & FSL_MC_REGION_SHAREABLE))
 > 360				vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
   361		} else
   362			vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
   363	
   364		vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff;
   365	
   366		return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
   367				       size, vma->vm_page_prot);
   368	}
   369	

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