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 #ifdef CONFIG_CMA_DEBUGFS
  11         struct hlist_head mem_head;
  12         spinlock_t mem_head_lock;
  13 #endif
  14         const char *name;
  15 };
  16
  17 extern struct cma cma_areas[MAX_CMA_AREAS];
  18 extern unsigned cma_area_count;
  19
  20 static inline unsigned long cma_bitmap_maxno(struct cma *cma)
  21 {
  22         return cma->count >> cma->order_per_bit;
  23 }
  24
  25 #endif