diff options
Diffstat (limited to 'kernel/mm/cma.h')
| -rw-r--r-- | kernel/mm/cma.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/mm/cma.h b/kernel/mm/cma.h new file mode 100644 index 000000000..1132d7335 --- /dev/null +++ b/kernel/mm/cma.h @@ -0,0 +1,24 @@ +#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 +}; + +extern struct cma cma_areas[MAX_CMA_AREAS]; +extern unsigned cma_area_count; + +static unsigned long cma_bitmap_maxno(struct cma *cma) +{ + return cma->count >> cma->order_per_bit; +} + +#endif |