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Btrfs: fix device replace of a missing RAID 5/6 device
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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 };
15
16 extern struct cma cma_areas[MAX_CMA_AREAS];
17 extern unsigned cma_area_count;
18
19 static unsigned long cma_bitmap_maxno(struct cma *cma)
20 {
21 return cma->count >> cma->order_per_bit;
22 }
23
24 #endif