Index: linux-2.6.30.5/arch/mips/mm/cache.c
===================================================================
--- linux-2.6.30.5.orig/arch/mips/mm/cache.c	2009-09-02 18:31:37.000000000 +0200
+++ linux-2.6.30.5/arch/mips/mm/cache.c	2009-09-02 18:31:42.000000000 +0200
@@ -52,6 +52,8 @@
 void (*_dma_cache_inv)(unsigned long start, unsigned long size);
 
 EXPORT_SYMBOL(_dma_cache_wback_inv);
+EXPORT_SYMBOL(_dma_cache_wback);
+EXPORT_SYMBOL(_dma_cache_inv);
 
 #endif /* CONFIG_DMA_NONCOHERENT */