On Thu, 27 Jan 2005 18:50:50 +0100
Patrick McHardy <kaber@xxxxxxxxx> wrote:
> From what I can see it doesn't generate tail-calls currently:
Indeed... It even doesn't do this on Sparc64 either, even for
the okfn(skb) call which I was sure it would.
It won't tail-call for function pointers for some strance reason
as exhibited by this simple test:
struct sk_buff {
int foo;
};
int invoke(struct sk_buff *skb, int (*okfn)(struct sk_buff *))
{
return okfn(skb);
}
extern int test_func(struct sk_buff *);
int invoke2(struct sk_buff *skb)
{
return test_func(skb);
}
In the generated asm on sparc64, invoke2() gets a tail-call
whereas invoke() does not. Hmmm...
