Constant byteorder macros.

[David Woodhouse]

hpa en transmeta.com said:
> Given that gcc has a __builtin_constant_p(x), you ought to be able to
> do:

> #define cpu_to_le16(x) ( __builtin_constant_p(x) ? \
>	__constant_cpu_to_le16(x) : __cpu_to_le16(x) ) 

I didn't really explore this avenue very deeply - I assumed that because it's 
been done with a separate __constant_x macro in the htonl() case, there was a 
problem with doing it in the way you suggest.


--
dwmw2



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