函数逻辑报告

函数名称：skb_frag_dma_map - maps a paged fragment via the DMA API*@dev: the device to map the fragment to*@frag: the paged fragment to map*@offset: the offset within the fragment (starting at the* fragment's own offset)*@size: the number of bytes to map*@dir: the

函数原型：static inline dma_addr_t skb_frag_dma_map(struct device *dev, const skb_frag_t *frag, size_t offset, size_t size, enum dma_data_direction dir)

返回类型：dma_addr_t

参数：