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 26