why so many unexported headers checking __KERNEL__?

[Robert P. J. Day]

  as an unintended side effect of checking for proper exporting to
user space and unifdef'ing, i noticed that there are literally
hundreds of kernel header files that check the value of __KERNEL__ in
some way, but are never exported to user space.  what's the point of
that?  thanks.

rday
--

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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
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