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Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __MM_CMA_H__
3#define __MM_CMA_H__
4
5#include <linux/debugfs.h>
6
7struct cma {
8 unsigned long base_pfn;
9 unsigned long count;
10 unsigned long *bitmap;
11 unsigned int order_per_bit; /* Order of pages represented by one bit */
12 struct mutex lock;
13#ifdef CONFIG_CMA_DEBUGFS
14 struct hlist_head mem_head;
15 spinlock_t mem_head_lock;
16 struct debugfs_u32_array dfs_bitmap;
17#endif
18 char name[CMA_MAX_NAME];
19};
20
21extern struct cma cma_areas[MAX_CMA_AREAS];
22extern unsigned cma_area_count;
23
24static inline unsigned long cma_bitmap_maxno(struct cma *cma)
25{
26 return cma->count >> cma->order_per_bit;
27}
28
29#endif