Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / mm / cma.h

diff --git a/kernel/mm/cma.h b/kernel/mm/cma.h
new file mode 100644 (file)
index 0000000..1132d73
--- /dev/null
+++ b/kernel/mm/cma.h
@@ -0,0 +1,24 @@
+#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
+};
+
+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