Re: [PATCH 01/18] Structural cleanup for filesystem-based swap

[kernel test robot]

Hi NeilBrown,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on cifs/for-next]
[also build test ERROR on axboe-block/for-next mszeredi-vfs/overlayfs-next rostedt-trace/for-next linus/master v5.16-rc5 next-20211216]
[cannot apply to trondmy-nfs/linux-next hnaz-mm/master]
[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/NeilBrown/Repair-SWAP-over-NFS/20211217-075659
base:   git://git.samba.org/sfrench/cifs-2.6.git for-next
config: arm-randconfig-r005-20211216 (https://download.01.org/0day-ci/archive/20211217/202112171822.DW1WPE1G-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9043c3d65b11b442226015acfbf8167684586cfa)
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
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/0day-ci/linux/commit/6443c9d01129c1a1c19f3df4a594b01e3772e6bd
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review NeilBrown/Repair-SWAP-over-NFS/20211217-075659
        git checkout 6443c9d01129c1a1c19f3df4a594b01e3772e6bd
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash fs/nfs/

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/nfs/file.c:512:8: error: implicit declaration of function 'add_swap_extent' [-Werror,-Wimplicit-function-declaration]
           ret = add_swap_extent(sis, 0, sis->max, 0);
                 ^
   1 error generated.


vim +/add_swap_extent +512 fs/nfs/file.c

   486	
   487	static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file,
   488							sector_t *span)
   489	{
   490		unsigned long blocks;
   491		long long isize;
   492		int ret;
   493		struct rpc_clnt *clnt = NFS_CLIENT(file->f_mapping->host);
   494		struct inode *inode = file->f_mapping->host;
   495	
   496		if (!file->f_mapping->a_ops->swap_rw)
   497			/* Cannot support swap */
   498			return -EINVAL;
   499	
   500		spin_lock(&inode->i_lock);
   501		blocks = inode->i_blocks;
   502		isize = inode->i_size;
   503		spin_unlock(&inode->i_lock);
   504		if (blocks*512 < isize) {
   505			pr_warn("swap activate: swapfile has holes\n");
   506			return -EINVAL;
   507		}
   508	
   509		ret = rpc_clnt_swap_activate(clnt);
   510		if (ret)
   511			return ret;
 > 512		ret = add_swap_extent(sis, 0, sis->max, 0);
   513		if (ret < 0) {
   514			rpc_clnt_swap_deactivate(clnt);
   515			return ret;
   516		}
   517		*span = sis->pages;
   518		sis->flags |= SWP_FS_OPS;
   519		return ret;
   520	}
   521	

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