`current' is a lousy choice for a variable name.  This driver explodes on
ppc64 because `current' expands to (local_paca->__current).

OK, the driver doesn't compile on power4 anyway, but...

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>