[Syllable-kernel] Patch: Updated atomic primitives

[Jake H. <jh...@an...>]

As discussed recently on syllable-developer (in the "LiveCD 0.5.4 Aterm 
problems" thread), the atomic primitives in Syllable badly needed 
updating for SMP safety.  Based on a suggestion by Daniel Gryniewicz, I 
replaced the primitives in atheos/atomic.h with versions based on Linux 
2.6.8's include/asm-i386/atomic.h.  Many locations in the kernel needed 
to be patched, but the patches were generally minor.  Also, I replaced 
occurrences of atomic_add(&foo, 1) and atomic_add(&foo, -1) with 
atomic_inc(&foo) and atomic_dec(&foo), which are slightly faster and 
more self-explanatory.

I also fixed a few typos and changed kernel/debug.c to use ints instead 
of floats.  Amazingly, the new kernel appears to run okay on my VMware 
setup, although I don't have an SMP installation to test on, and so this 
should be considered highly experimental.  I still need to patch the 
drivers and there may be other code that is broken by this change. 
Fortunately, the size of atomic_t stayed the same so new and old code 
should interoperate.  If you have any trouble with the bz2'd attachment, 
I can make the patches available for download.

Enjoy!
--
Jake Hamby