*参照元 [#m1a54649] #backlinks *説明 [#yfc4b859] -パス: [[linux-4.4.1/drivers/dma-buf/dma-buf.c]] -FIXME: これは何? --説明 **引数 [#p6a53d76] -struct dma_buf_attachment *attach -- --[[linux-4.4.1/dma_buf_attachment]] -struct sg_table *sg_table -- --[[linux-4.4.1/sg_table]] -enum dma_data_direction direction -- --[[linux-4.4.1/dma_data_direction]] **返り値 [#x8dfd0c5] -なし **参考 [#f08287a9] *実装 [#oc9a6b31] /** * dma_buf_unmap_attachment - unmaps and decreases usecount of the buffer;might * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of * dma_buf_ops. * @attach: [in] attachment to unmap buffer from * @sg_table: [in] scatterlist info of the buffer to unmap * @direction: [in] direction of DMA transfer * */ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, struct sg_table *sg_table, enum dma_data_direction direction) { might_sleep(); - --[[linux-4.4.1/might_sleep()]] if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) return; - --[[linux-4.4.1/WARN_ON()]] attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction); - --attach->dmabuf は struct dma_buf * 型 --[[linux-4.4.1/dma_buf]] --attach->dmabuf->ops は const struct dma_buf_ops * 型 --[[linux-4.4.1/dma_buf_ops]] } EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); - --[[linux-4.4.1/EXPORT_SYMBOL_GPL()]] *コメント [#h039fc62]