[MIPS] Handle IDE PIO cache aliases on SMP.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/mm/c-sb1.c b/arch/mips/mm/c-sb1.c
index 2f08b53..f9b1294 100644
--- a/arch/mips/mm/c-sb1.c
+++ b/arch/mips/mm/c-sb1.c
@@ -528,6 +528,7 @@
 	flush_cache_page = sb1_flush_cache_page;
 
 	flush_cache_sigtramp = sb1_flush_cache_sigtramp;
+	local_flush_data_cache_page = (void *) sb1_nop;
 	flush_data_cache_page = (void *) sb1_nop;
 
 	/* Full flush */