C inline functions working
 

hello,
I have some inline declaration questions.
1)why new kernel 2.4.30 has intermediate function of __ instead of direct calling it?
int ip_finish_output(struct sk_buff *skb)
{
return __ip_finish_output(skb);
}
and also __ip_finish_output is written as
static __inline__ int __ip_finish_output(struct sk_buff *skb)
what are these changes in kernel? Does they are for optimization?

2)Also ip_output is calling __ip_finish_output instead ip_finish_output why?
3) what is difference between declaring following 2 inline functions
static inline int ip_finish_output2(struct sk_buff *skb)
and
static __inline__ int __ip_finish_output(struct sk_buff *skb)
please correct me.
regards,
rahul.