[parisc-linux] A short note on includes

[Matthew Wilcox]

Something I've noticed while going through the 2.2 code and modifying
it for 2.3 is that people quite often use

#include <asm/spinlock.h>

instead of

#include <linux/spinlock.h>

It is almost always preferred to use linux/foo instead of asm/foo if
linux/foo exists.  The linux/foo file will perform the <asm/foo> include
to get the arch-specific pieces as necessary.  There's no need to panic
and submit dozens of patches right now (particularly since we're about
to make the 2.3 tree available for public submissions), but I thought
this was a useful thing for people to know for the future.