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Diffstat (limited to '')
-rw-r--r-- | mm/cma.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/mm/cma.h b/mm/cma.h new file mode 100644 index 000000000..33c0b5177 --- /dev/null +++ b/mm/cma.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __MM_CMA_H__ +#define __MM_CMA_H__ + +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; +#endif + const char *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 |