[SPARC64]: Add __read_mostly support.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/cache.h b/include/linux/cache.h
index 2b66a36..f6b5a46 100644
--- a/include/linux/cache.h
+++ b/include/linux/cache.h
@@ -13,7 +13,7 @@
 #define SMP_CACHE_BYTES L1_CACHE_BYTES
 #endif
 
-#ifdef CONFIG_X86
+#if defined(CONFIG_X86) || defined(CONFIG_SPARC64)
 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
 #else
 #define __read_mostly