2.6.20.20 with CFS fails to compile for powerpc, because this arch already has
its assembly-optimized __div64_32() implementation, so linking fails due to
two symbols.

The same issue appeared on the s390 arch, so this patch is inspired by it.

http://lkml.org/lkml/2007/4/11/24

Leon 'likewise' Woestenberg <leonw@mailcan.com>

Index: linux-2.6.20/lib/div64.c
===================================================================
--- linux-2.6.20.orig/lib/div64.c	2007-10-07 16:19:38.000000000 +0200
+++ linux-2.6.20/lib/div64.c	2007-10-07 16:20:15.000000000 +0200
@@ -23,7 +23,7 @@
 /* Not needed on 64bit architectures */
 #if BITS_PER_LONG == 32
 
-uint32_t __div64_32(uint64_t *n, uint32_t base)
+uint32_t __attribute__((weak)) __div64_32(uint64_t *n, uint32_t base)
 {
 	uint64_t rem = *n;
 	uint64_t b = base;