We had a problem in our dummy perfmon handler where we wouldnt reset the
PMAO bit.  If the bit ended up set and oprofile shutdown and removed its
handler then we would end up in a hard loop taking perfmon exceptions.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>