mm/cma.h

   1 #ifndef __MM_CMA_H__
   2 #define __MM_CMA_H__
   3
   4 struct cma {
   5         unsigned long   base_pfn;
   6         unsigned long   count;
   7         unsigned long   *bitmap;
   8         unsigned int order_per_bit; /* Order of pages represented by one bit */
   9         struct mutex    lock;
  10 };
  11
  12 extern struct cma cma_areas[MAX_CMA_AREAS];
  13 extern unsigned cma_area_count;
  14
  15 static unsigned long cma_bitmap_maxno(struct cma *cma)
  16 {
  17         return cma->count >> cma->order_per_bit;
  18 }
  19
  20 #endif