average: remove out-of-line implementation

Since all users are now converted to the inline implementation,
remove the out-of-line implementation entirely.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/average.h

@@ -3,30 +3,6 @@
 
 /* Exponentially weighted moving average (EWMA) */
 
-/* For more documentation see lib/average.c */
-
-struct ewma {
-	unsigned long internal;
-	unsigned long factor;
-	unsigned long weight;
-};
-
-extern void ewma_init(struct ewma *avg, unsigned long factor,
-		      unsigned long weight);
-
-extern struct ewma *ewma_add(struct ewma *avg, unsigned long val);
-
-/**
- * ewma_read() - Get average value
- * @avg: Average structure
- *
- * Returns the average value held in @avg.
- */
-static inline unsigned long ewma_read(const struct ewma *avg)
-{
-	return avg->internal >> avg->factor;
-}
-
 #define DECLARE_EWMA(name, _factor, _weight)				\
 	struct ewma_##name {						\
 		unsigned long internal;					\

lib/Kconfig

@@ -460,16 +460,6 @@ config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 config LRU_CACHE
 	tristate
 
-config AVERAGE
-	bool "Averaging functions"
-	help
-	  This option is provided for the case where no in-kernel-tree
-	  modules require averaging functions, but a module built outside
-	  the kernel tree does. Such modules that use library averaging
-	  functions require Y here.
-
-	  If unsure, say N.
-
 config CLZ_TAB
 	bool