Cregit: Linux 5.9: cma.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Sasha Levin	80	80.81%	2	28.57%
Barry Song	7	7.07%	1	14.29%
Jakub Kiciński	7	7.07%	1	14.29%
Laura Abbott	3	3.03%	1	14.29%
Greg Kroah-Hartman	1	1.01%	1	14.29%
Gregory Fong	1	1.01%	1	14.29%
Total	99		7

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __MM_CMA_H__
#define __MM_CMA_H__

#include <linux/debugfs.h>

#define CMA_MAX_NAME 64

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;
	struct debugfs_u32_array dfs_bitmap;
#endif
	char name[CMA_MAX_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