On Tue, 17 Nov 2020 16:22:23 -0500 (EST)
Mathieu Desnoyers <mathieu.desnoy...@efficios.com> wrote:

> If we don't call the stub, then there is no point in having the stub at
> all, and we should just compare to a constant value, e.g. 0x1UL. As far
> as I can recall, comparing with a small immediate constant is more efficient
> than comparing with a loaded value on many architectures.

Why 0x1UL, and not just set it to NULL.

                do {                                                    \
                        it_func = (it_func_ptr)->func;                  \
                        __data = (it_func_ptr)->data;                   \
                        if (likely(it_func))                            \
                                ((void(*)(void *, proto))(it_func))(__data, 
args); \
                } while ((++it_func_ptr)->func);


-- Steve

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