This patch contains the following cleanups on several architectures:
- make some needlessly global code static
- remove the following write-only (except for printk's) variables:
  - cache_decay_ticks
  - smp_threads_ready
  - cacheflush_time

I've only tried the compilation on i386, but I hope all mistakes I made 
are on unimportant architectures.  ;-)
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>