[PATCH] mm: consolidate get_order

Someone mentioned that almost all the architectures used basically the same
implementation of get_order.  This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places.  The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index 0577daf..fa0b41b 100644
--- a/include/asm-alpha/page.h
+++ b/include/asm-alpha/page.h
@@ -63,20 +63,6 @@
 
 #endif /* STRICT_MM_TYPECHECKS */
 
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
-	int order;
-
-	size = (size-1) >> (PAGE_SHIFT-1);
-	order = -1;
-	do {
-		size >>= 1;
-		order++;
-	} while (size);
-	return order;
-}
-
 #ifdef USE_48_BIT_KSEG
 #define PAGE_OFFSET		0xffff800000000000UL
 #else
@@ -112,4 +98,6 @@
 
 #endif /* __KERNEL__ */
 
+#include <asm-generic/page.h>
+
 #endif /* _ALPHA_PAGE_H */