nfs: use %p[dD] instead of open-coded (and often racy) equivalents

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index bb939ed..8285de9 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -495,9 +495,8 @@
 	struct rpc_task *task;
 	int            error = -EIO;
 
-	dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		d_count(dentry));
+	dfprintk(VFS, "NFS: silly-rename(%pd2, ct=%d)\n",
+		dentry, d_count(dentry));
 	nfs_inc_stats(dir, NFSIOS_SILLYRENAME);
 
 	/*
@@ -522,8 +521,8 @@
 				SILLYNAME_FILEID_LEN, fileid,
 				SILLYNAME_COUNTER_LEN, sillycounter);
 
-		dfprintk(VFS, "NFS: trying to rename %s to %s\n",
-				dentry->d_name.name, silly);
+		dfprintk(VFS, "NFS: trying to rename %pd to %s\n",
+				dentry, silly);
 
 		sdentry = lookup_one_len(silly, dentry->d_parent, slen);
 		/*