[RFC PATCH 09/60] hyper_dmabuf: indirect DMA_BUF synchronization via shadowing

Importer now sends a synchronization request to the exporter when any of DMA_BUF operations on imported Hyper_DMABUF is executed (e.g dma_buf_map and dma_buf_unmap). This results in a creation of shadow DMA_BUF and exactly same DMA_BUF operation to be executed on it. The main purpose of this is

[RFC PATCH 09/60] hyper_dmabuf: indirect DMA_BUF synchronization via shadowing

Importer now sends a synchronization request to the exporter when any of DMA_BUF operations on imported Hyper_DMABUF is executed (e.g dma_buf_map and dma_buf_unmap). This results in a creation of shadow DMA_BUF and exactly same DMA_BUF operation to be executed on it. The main purpose of this is