/* 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