what is the value of the macro "__setup_param"?

  perhaps i'm missing it, but it seems that the macro __setup_param is
entirely superfluous:

$ grep -rw __setup_param *
include/linux/init.h:#define __setup_param(str, unique_id, fn, early)      \
include/linux/init.h:   __setup_param(str, unique_id, NULL, 0)
include/linux/init.h:   __setup_param(str, fn, fn, 0)
include/linux/init.h:   __setup_param(str, fn, fn, 1)
include/linux/init.h:#define __setup_param(str, unique_id, fn)  /* nothing */
$

or am i must misreading something badly?

rday
-- 
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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://crashcourse.ca
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