}
#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
+extern type __lookup_##name##_key; \
static type *lookup_##name(struct rb_root *root, \
- typeof(((type *)0)->keyfld) key) \
+ typeof(__lookup_##name##_key.keyfld) key) \
{ \
struct rb_node *n = root->rb_node; \
\