[PATCH] avoid sparse warning due to time-interpolator

The "addr" member in the time-interpolator is sometimes used as a
function-pointer and sometimes as an I/O-memory pointer.  The attached
patch tells sparse that this is OK.
Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/timer.c

@@ -1411,10 +1411,10 @@ static inline u64 time_interpolator_get_cycles(unsigned int src)
 			return x();
 
 		case TIME_SOURCE_MMIO64	:
-			return readq(time_interpolator->addr);
+			return readq((void __iomem *) time_interpolator->addr);
 
 		case TIME_SOURCE_MMIO32	:
-			return readl(time_interpolator->addr);
+			return readl((void __iomem *) time_interpolator->addr);
 
 		default: return get_cycles();
 	}