definition for __builtin_constant_p and __outb_p

lgs (lgs@psbhns.hk.hq.cn)
Thu, 19 Sep 1996 10:41:41 -0700

Hi

where is the definition for __builtin_constant_p and __outb_p in linux
kernel source code? I find these function ( macro?) used in
include/asm/io.h, but I can not find any definition for them.

Thank you

Gengsheng Lin