[PATCH 4/8] v4l: videobuf2: add DMA coherent allocator

From: Pawel Osciak Add an implementation of DMA coherent memory allocator and handling routines for videobuf2, implemented on top of dma_alloc_coherent() call. Signed-off-by: Pawel Osciak Signed-off-by: Kyungmin Park Signed-off-by: Marek Szyprowski CC: Pawel Osciak --- drivers/media/video/K

[PATCH 4/8] v4l: videobuf2: add DMA coherent allocator

From: Pawel Osciak Add an implementation of DMA coherent memory allocator and handling routines for videobuf2, implemented on top of dma_alloc_coherent() call. Signed-off-by: Pawel Osciak Signed-off-by: Kyungmin Park Signed-off-by: Marek Szyprowski CC: Pawel Osciak --- drivers/media/video/K