[PATCH] CMA: fix ARM build failure related to MAX_CMA_AREAS definition

[Joonsoo Kim]

If CMA is disabled, CONFIG_CMA_AREAS isn't defined so compile error
happens. To fix it, define MAX_CMA_AREAS if CONFIG_CMA_AREAS
isn't defined.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

diff --git a/include/linux/cma.h b/include/linux/cma.h
index 32cab7a..371b930 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -5,8 +5,14 @@
  * There is always at least global CMA area and a few optional
  * areas configured in kernel .config.
  */
+#ifdef CONFIG_CMA_AREAS
 #define MAX_CMA_AREAS	(1 + CONFIG_CMA_AREAS)
 
+#else
+#define MAX_CMA_AREAS	(0)
+
+#endif
+
 struct cma;
 
 extern phys_addr_t cma_get_base(struct cma *cma);
-- 
1.7.9.5

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