Re: [PATCH v6 4/6] dax: add DAX_RECOVERY flag and .recovery_write dev_pgmap_ops

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

Hi Jane,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on nvdimm/libnvdimm-for-next]
[also build test WARNING on device-mapper-dm/for-next linus/master v5.17-rc8 next-20220318]
[cannot apply to tip/x86/mm]
[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/Jane-Chu/DAX-poison-recovery/20220319-143144
base:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
config: s390-randconfig-r044-20220317 (https://download.01.org/0day-ci/archive/20220319/202203191610.umg0CGkh-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 11.2.0
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/203570f765a6ad07eb5809850478a25a5257f7e2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jane-Chu/DAX-poison-recovery/20220319-143144
        git checkout 203570f765a6ad07eb5809850478a25a5257f7e2
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash fs/fuse/

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

All warnings (new ones prefixed by >>):

   fs/fuse/virtio_fs.c: In function 'virtio_fs_zero_page_range':
>> fs/fuse/virtio_fs.c:774:58: warning: passing argument 4 of 'dax_direct_access' makes integer from pointer without a cast [-Wint-conversion]
     774 |         rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
         |                                                          ^~~~~~
         |                                                          |
         |                                                          void **
   In file included from fs/fuse/virtio_fs.c:8:
   include/linux/dax.h:187:21: note: expected 'int' but argument is of type 'void **'
     187 |                 int flags, void **kaddr, pfn_t *pfn);
         |                 ~~~~^~~~~
   fs/fuse/virtio_fs.c:774:14: error: too few arguments to function 'dax_direct_access'
     774 |         rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
         |              ^~~~~~~~~~~~~~~~~
   In file included from fs/fuse/virtio_fs.c:8:
   include/linux/dax.h:186:6: note: declared here
     186 | long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages,
         |      ^~~~~~~~~~~~~~~~~
   fs/fuse/virtio_fs.c: At top level:
   fs/fuse/virtio_fs.c:783:26: error: initialization of 'long int (*)(struct dax_device *, long unsigned int,  long int,  int,  void **, pfn_t *)' from incompatible pointer type 'long int (*)(struct dax_device *, long unsigned int,  long int,  void **, pfn_t *)' [-Werror=incompatible-pointer-types]
     783 |         .direct_access = virtio_fs_direct_access,
         |                          ^~~~~~~~~~~~~~~~~~~~~~~
   fs/fuse/virtio_fs.c:783:26: note: (near initialization for 'virtio_fs_dax_ops.direct_access')
   cc1: some warnings being treated as errors


vim +/dax_direct_access +774 fs/fuse/virtio_fs.c

22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  767  
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  768  static int virtio_fs_zero_page_range(struct dax_device *dax_dev,
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  769  				     pgoff_t pgoff, size_t nr_pages)
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  770  {
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  771  	long rc;
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  772  	void *kaddr;
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  773  
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19 @774  	rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  775  	if (rc < 0)
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  776  		return rc;
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  777  	memset(kaddr, 0, nr_pages << PAGE_SHIFT);
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  778  	dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT);
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  779  	return 0;
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  780  }
22f3787e9d95e7 Stefan Hajnoczi 2020-08-19  781  

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