Re: [PATCH v7 4/8] fs, block: copy_file_range for def_blk_ops for direct block device.

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

Hi Nitesh,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on device-mapper-dm/for-next]
[also build test WARNING on linus/master v6.2 next-20230220]
[cannot apply to axboe-block/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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Add-copy-offload-support-infrastructure/20230220-205057
base:   https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
patch link:    https://lore.kernel.org/r/20230220105336.3810-5-nj.shetty%40samsung.com
patch subject: [PATCH v7 4/8] fs, block: copy_file_range for def_blk_ops for direct block device.
config: powerpc-allnoconfig (https://download.01.org/0day-ci/archive/20230220/202302202321.zfUe705N-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/0f95ad2cb727ac6ac8406a01ff216d9237b403b7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Nitesh-Shetty/block-Add-copy-offload-support-infrastructure/20230220-205057
        git checkout 0f95ad2cb727ac6ac8406a01ff216d9237b403b7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302202321.zfUe705N-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> block/fops.c:614:9: warning: no previous prototype for 'blkdev_copy_file_range' [-Wmissing-prototypes]
     614 | ssize_t blkdev_copy_file_range(struct file *file_in, loff_t pos_in,
         |         ^~~~~~~~~~~~~~~~~~~~~~


vim +/blkdev_copy_file_range +614 block/fops.c

   613	
 > 614	ssize_t blkdev_copy_file_range(struct file *file_in, loff_t pos_in,
   615					struct file *file_out, loff_t pos_out,
   616					size_t len, unsigned int flags)
   617	{
   618		struct block_device *in_bdev = I_BDEV(bdev_file_inode(file_in));
   619		struct block_device *out_bdev = I_BDEV(bdev_file_inode(file_out));
   620		int comp_len;
   621	
   622		comp_len = blkdev_copy_offload(in_bdev, pos_in, out_bdev, pos_out, len,
   623				    NULL, NULL, GFP_KERNEL);
   624		if (comp_len != len)
   625			comp_len = generic_copy_file_range(file_in, pos_in + comp_len,
   626				file_out, pos_out + comp_len, len - comp_len, flags);
   627	
   628		return comp_len;
   629	}
   630	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests