[sj:damon/next 20/20] drivers/block/xen-blkback/xenbus.c:184:38: error: use of undeclared identifier 'feature_persistent'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git damon/next
head:   40d1ef717dd762939c0a8734fd901ee517b50334
commit: 40d1ef717dd762939c0a8734fd901ee517b50334 [20/20] xen-blkback: fix persistent grants negotiation
config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20220712/202207121401.8Yis7IHm-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project badda4ac3c489a8c8cccdad1f74b9308c350a9e0)
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://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git/commit/?id=40d1ef717dd762939c0a8734fd901ee517b50334
        git remote add sj https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git
        git fetch --no-tags sj damon/next
        git checkout 40d1ef717dd762939c0a8734fd901ee517b50334
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/block/xen-blkback/

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

All errors (new ones prefixed by >>):

>> drivers/block/xen-blkback/xenbus.c:184:38: error: use of undeclared identifier 'feature_persistent'
           blkif->vbd.feature_gnt_persistent = feature_persistent;
                                               ^
   1 error generated.


vim +/feature_persistent +184 drivers/block/xen-blkback/xenbus.c

   159	
   160	static struct xen_blkif *xen_blkif_alloc(domid_t domid)
   161	{
   162		struct xen_blkif *blkif;
   163	
   164		BUILD_BUG_ON(MAX_INDIRECT_PAGES > BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST);
   165	
   166		blkif = kmem_cache_zalloc(xen_blkif_cachep, GFP_KERNEL);
   167		if (!blkif)
   168			return ERR_PTR(-ENOMEM);
   169	
   170		blkif->domid = domid;
   171		atomic_set(&blkif->refcnt, 1);
   172		init_completion(&blkif->drain_complete);
   173	
   174		/*
   175		 * Because freeing back to the cache may be deferred, it is not
   176		 * safe to unload the module (and hence destroy the cache) until
   177		 * this has completed. To prevent premature unloading, take an
   178		 * extra module reference here and release only when the object
   179		 * has been freed back to the cache.
   180		 */
   181		__module_get(THIS_MODULE);
   182		INIT_WORK(&blkif->free_work, xen_blkif_deferred_free);
   183	
 > 184		blkif->vbd.feature_gnt_persistent = feature_persistent;
   185	
   186		return blkif;
   187	}
   188	

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