nfsd: get rid of ->f_dentry

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/nfsd/nfs4recover.c

@@ -705,7 +705,7 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 	struct cld_upcall *tmp, *cup;
 	struct cld_msg __user *cmsg = (struct cld_msg __user *)src;
 	uint32_t xid;
-	struct nfsd_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,
+	struct nfsd_net *nn = net_generic(file_inode(filp)->i_sb->s_fs_info,
 						nfsd_net_id);
 	struct cld_net *cn = nn->cld_net;