#ifndef ASM_DMA_CONTIGUOUS_H#define ASM_DMA_CONTIGUOUS_H #ifdef __KERNEL__#ifdef CONFIG_CMA #include <linux/device.h>#include <linux/dma-contiguous.h> static inline struct cma *dev_get_cma_area(struct device *dev){	if (dev && dev->cma_area)		return dev->cma_area;	return dma_contiguous_default_area;} static inline void dev_set_cma_area(struct device *dev, struct cma *cma){	if (dev)		dev->cma_area = cma;	if (!dev || !dma_contiguous_default_area)		dma_contiguous_default_area = cma;} #endif#endif #endif