get rid of 'parent' argument of ->d_compare()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index a5e607e..688ccc1 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -45,8 +45,7 @@
  * So we need to perform a case-sensitive match on part 1 and a
  * case-insensitive match on part 2.
  */
-static int efivarfs_d_compare(const struct dentry *parent,
-			      const struct dentry *dentry,
+static int efivarfs_d_compare(const struct dentry *dentry,
 			      unsigned int len, const char *str,
 			      const struct qstr *name)
 {