Hi Joao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on hnaz-mm/master]

url:    https://github.com/0day-ci/linux/commits/Joao-Martins/mm-device-dax-Introduce-compound-pages-in-devmap/20211203-044722
base:   https://github.com/hnaz/linux-mm master
config: i386-randconfig-a013-20211202 (https://download.01.org/0day-ci/archive/20211203/202112031508.uJvmXK7U-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/ca6ce8fa76f139a8d4021fc95ce7ba1ebb7a06e2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Joao-Martins/mm-device-dax-Introduce-compound-pages-in-devmap/20211203-044722
        git checkout ca6ce8fa76f139a8d4021fc95ce7ba1ebb7a06e2
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   drivers/dax/device.c: In function 'dev_dax_huge_fault':

quoted

drivers/dax/device.c:246:8: error: too few arguments to function '__dev_dax_pud_fault'

     246 |   rc = __dev_dax_pud_fault(dev_dax, vmf);
         |        ^~~~~~~~~~~~~~~~~~~
   drivers/dax/device.c:218:19: note: declared here
     218 | static vm_fault_t __dev_dax_pud_fault(struct dev_dax *dev_dax,
         |                   ^~~~~~~~~~~~~~~~~~~
   drivers/dax/device.c: At top level:
   drivers/dax/device.c:394:5: warning: no previous prototype for 'dev_dax_probe' [-Wmissing-prototypes]
     394 | int dev_dax_probe(struct dev_dax *dev_dax)
         |     ^~~~~~~~~~~~~


vim +/__dev_dax_pud_fault +246 drivers/dax/device.c

   224	
   225	static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf,
   226			enum page_entry_size pe_size)
   227	{
   228		struct file *filp = vmf->vma->vm_file;
   229		vm_fault_t rc = VM_FAULT_SIGBUS;
   230		int id;
   231		struct dev_dax *dev_dax = filp->private_data;
   232	
   233		dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) size = %d\n", current->comm,
   234				(vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
   235				vmf->vma->vm_start, vmf->vma->vm_end, pe_size);
   236	
   237		id = dax_read_lock();
   238		switch (pe_size) {
   239		case PE_SIZE_PTE:
   240			rc = __dev_dax_pte_fault(dev_dax, vmf);
   241			break;
   242		case PE_SIZE_PMD:
   243			rc = __dev_dax_pmd_fault(dev_dax, vmf);
   244			break;
   245		case PE_SIZE_PUD:
 > 246			rc = __dev_dax_pud_fault(dev_dax, vmf);
   247			break;
   248		default:
   249			rc = VM_FAULT_SIGBUS;
   250		}
   251	
   252		dax_read_unlock(id);
   253	
   254		return rc;
   255	}
   256	

---
0-DAY CI Kernel Test Service, Intel Corporation
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