LXR linux/mm/cma.h

   1#ifndef __MM_CMA_H__
   2#define __MM_CMA_H__
   3
   4struct 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
  17extern struct cma cma_areas[MAX_CMA_AREAS];
  18extern unsigned cma_area_count;
  19
  20static inline unsigned long cma_bitmap_maxno(struct cma *cma)
  21{
  22        return cma->count >> cma->order_per_bit;
  23}
  24
  25#endif
  26