Anton prompted me to get this patch merged.  It changes the core buffer
sync algorithm of OProfile to avoid global locks wherever possible.  Anton
tested an earlier version of this patch with some success.  I've lightly
tested this applied against 2.6.8.1-mm3 on my two-way machine.

The changes also have the happy side-effect of losing less samples after
munmap operations, and removing the blind spot of tasks exiting inside the
kernel.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>