1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __MM_CMA_H__ 3 #define __MM_CMA_H__ 4 5 struct cma { 6 unsigned long base_pfn; 7 unsigned long count; 8 unsigned long *bitmap; 9 unsigned int order_per_bit; /* Order of pages represented by one bit */ 10 struct mutex lock; 11 #ifdef CONFIG_CMA_DEBUGFS 12 struct hlist_head mem_head; 13 spinlock_t mem_head_lock; 14 #endif 15 const char *name; 16 }; 17 18 extern struct cma cma_areas[MAX_CMA_AREAS]; 19 extern unsigned cma_area_count; 20 cma_bitmap_maxno(struct cma * cma)21static inline unsigned long cma_bitmap_maxno(struct cma *cma) 22 { 23 return cma->count >> cma->order_per_bit; 24 } 25 26 #endif 27