1 files changed, 26 insertions, 0 deletions
diff --git a/mm/cma.h b/mm/cma.h
new file mode 100644
index 000000000..33c0b5177
--- /dev/null
+++ b/mm/cma.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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;
+#ifdef CONFIG_CMA_DEBUGFS
+	struct hlist_head mem_head;
+	spinlock_t mem_head_lock;
+#endif
+	const char *name;
+};
+
+extern struct cma cma_areas[MAX_CMA_AREAS];
+extern unsigned cma_area_count;
+
+static inline unsigned long cma_bitmap_maxno(struct cma *cma)
+{
+	return cma->count >> cma->order_per_bit;
+}
+
+#endif