Re: [PATCH v9 3/8] fsdax: Replace mmap entry in case of CoW

[kernel test robot]

Hi Shiyang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.15-rc1 next-20210916]
[cannot apply to xfs-linux/for-next hch-configfs/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Shiyang-Ruan/fsdax-xfs-Add-reflink-dedupe-support-for-fsdax/20210915-184743
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3ca706c189db861b2ca2019a0901b94050ca49d8
config: hexagon-randconfig-r045-20210916 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f)
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/0day-ci/linux/commit/34b16b56bacb2d3e1e98f9ed47d20b545358bdcd
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shiyang-Ruan/fsdax-xfs-Add-reflink-dedupe-support-for-fsdax/20210915-184743
        git checkout 34b16b56bacb2d3e1e98f9ed47d20b545358bdcd
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 

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

All errors (new ones prefixed by >>):

>> fs/dax.c:1483:38: error: incompatible pointer types passing 'const struct iomap_iter *' to parameter of type 'const struct iomap *' [-Werror,-Wincompatible-pointer-types]
                   return dax_pmd_load_hole(xas, vmf, iter, entry);
                                                      ^~~~
   fs/dax.c:1206:23: note: passing argument to parameter 'iomap' here
                   const struct iomap *iomap, void **entry)
                                       ^
   1 error generated.


vim +1483 fs/dax.c

  1451	
  1452	/**
  1453	 * dax_fault_iter - Common actor to handle pfn insertion in PTE/PMD fault.
  1454	 * @vmf:	vm fault instance
  1455	 * @iter:	iomap iter
  1456	 * @pfnp:	pfn to be returned
  1457	 * @xas:	the dax mapping tree of a file
  1458	 * @entry:	an unlocked dax entry to be inserted
  1459	 * @pmd:	distinguish whether it is a pmd fault
  1460	 */
  1461	static vm_fault_t dax_fault_iter(struct vm_fault *vmf,
  1462			const struct iomap_iter *iter, pfn_t *pfnp,
  1463			struct xa_state *xas, void **entry, bool pmd)
  1464	{
  1465		const struct iomap *iomap = &iter->iomap;
  1466		const struct iomap *srcmap = &iter->srcmap;
  1467		size_t size = pmd ? PMD_SIZE : PAGE_SIZE;
  1468		loff_t pos = (loff_t)xas->xa_index << PAGE_SHIFT;
  1469		bool write = iter->flags & IOMAP_WRITE;
  1470		unsigned long entry_flags = pmd ? DAX_PMD : 0;
  1471		int err = 0;
  1472		pfn_t pfn;
  1473		void *kaddr;
  1474	
  1475		if (!pmd && vmf->cow_page)
  1476			return dax_fault_cow_page(vmf, iter);
  1477	
  1478		/* if we are reading UNWRITTEN and HOLE, return a hole. */
  1479		if (!write &&
  1480		    (iomap->type == IOMAP_UNWRITTEN || iomap->type == IOMAP_HOLE)) {
  1481			if (!pmd)
  1482				return dax_load_hole(xas, vmf, iter, entry);
> 1483			return dax_pmd_load_hole(xas, vmf, iter, entry);
  1484		}
  1485	
  1486		if (iomap->type != IOMAP_MAPPED && !(iomap->flags & IOMAP_F_SHARED)) {
  1487			WARN_ON_ONCE(1);
  1488			return pmd ? VM_FAULT_FALLBACK : VM_FAULT_SIGBUS;
  1489		}
  1490	
  1491		err = dax_iomap_direct_access(iomap, pos, size, &kaddr, &pfn);
  1492		if (err)
  1493			return pmd ? VM_FAULT_FALLBACK : dax_fault_return(err);
  1494	
  1495		*entry = dax_insert_entry(xas, vmf, iter, *entry, pfn, entry_flags);
  1496	
  1497		if (write &&
  1498		    srcmap->addr != IOMAP_HOLE && srcmap->addr != iomap->addr) {
  1499			err = dax_iomap_cow_copy(pos, size, size, srcmap, kaddr);
  1500			if (err)
  1501				return dax_fault_return(err);
  1502		}
  1503	
  1504		if (dax_fault_is_synchronous(iter, vmf->vma))
  1505			return dax_fault_synchronous_pfnp(pfnp, pfn);
  1506	
  1507		/* insert PMD pfn */
  1508		if (pmd)
  1509			return vmf_insert_pfn_pmd(vmf, pfn, write);
  1510	
  1511		/* insert PTE pfn */
  1512		if (write)
  1513			return vmf_insert_mixed_mkwrite(vmf->vma, vmf->address, pfn);
  1514		return vmf_insert_mixed(vmf->vma, vmf->address, pfn);
  1515	}
  1516	

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

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