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-rw-r--r--mm/cma.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/cma.h b/mm/cma.h
new file mode 100644
index 000000000000..4141887bbfb0
--- /dev/null
+++ b/mm/cma.h
@@ -0,0 +1,20 @@
+#ifndef __MM_CMA_H__
+#define __MM_CMA_H__
+
+struct cma {
+ unsigned long base_pfn;
+ unsigned long count;
+ unsigned long *bitmap;
+ unsigned int order_per_bit; /* Order of pages represented by one bit */
+ struct mutex lock;
+};
+
+extern struct cma cma_areas[MAX_CMA_AREAS];
+extern unsigned cma_area_count;
+
+static unsigned long cma_bitmap_maxno(struct cma *cma)
+{
+ return cma->count >> cma->order_per_bit;
+}
+
+#endif