Re: [PATCH 03/11] device-dax: enable page_mapping()

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

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Hi Dan,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.17-rc7 next-20180530]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Dan-Williams/mm-Teach-memory_failure-about-ZONE_DEVICE-pages/20180525-035652
config: arm64-allmodconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All errors (new ones prefixed by >>):

   drivers//dax/device.c: In function 'dev_dax_huge_fault':
>> drivers//dax/device.c:413:8: error: too many arguments to function '__dev_dax_pud_fault'
      rc = __dev_dax_pud_fault(dev_dax, vmf, &pfn);
           ^~~~~~~~~~~~~~~~~~~
   drivers//dax/device.c:380:19: note: declared here
    static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
                      ^~~~~~~~~~~~~~~~~~~

vim +/__dev_dax_pud_fault +413 drivers//dax/device.c

   386	
   387	static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf,
   388			enum page_entry_size pe_size)
   389	{
   390		struct vm_area_struct *vma = vmf->vma;
   391		struct file *filp = vma->vm_file;
   392		unsigned long fault_size;
   393		int rc, id;
   394		pfn_t pfn;
   395		struct dev_dax *dev_dax = filp->private_data;
   396	
   397		dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) size = %d\n", current->comm,
   398				(vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
   399				vma->vm_start, vma->vm_end, pe_size);
   400	
   401		id = dax_read_lock();
   402		switch (pe_size) {
   403		case PE_SIZE_PTE:
   404			fault_size = PAGE_SIZE;
   405			rc = __dev_dax_pte_fault(dev_dax, vmf, &pfn);
   406			break;
   407		case PE_SIZE_PMD:
   408			fault_size = PMD_SIZE;
   409			rc = __dev_dax_pmd_fault(dev_dax, vmf, &pfn);
   410			break;
   411		case PE_SIZE_PUD:
   412			fault_size = PUD_SIZE;
 > 413			rc = __dev_dax_pud_fault(dev_dax, vmf, &pfn);
   414			break;
   415		default:
   416			rc = VM_FAULT_SIGBUS;
   417		}
   418	
   419		if (rc == VM_FAULT_NOPAGE) {
   420			unsigned long i;
   421	
   422			for (i = 0; i < fault_size / PAGE_SIZE; i++) {
   423				struct page *page;
   424	
   425				page = pfn_to_page(pfn_t_to_pfn(pfn) + i);
   426				if (page->mapping)
   427					continue;
   428				page->mapping = filp->f_mapping;
   429			}
   430		}
   431		dax_read_unlock(id);
   432	
   433		return rc;
   434	}
   435	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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