Function at drivers/dma/virt-dma.h, line 149 References: drivers/dma/amba-pl08x.c, line 1203 drivers/dma/bcm2835-dma.c, line 531 drivers/dma/dma-axi-dmac.c, line 495 drivers/dma/dma-jz4740.c, line 495 drivers/dma/dma-jz4780.c, line 683 drivers/dma/edma.c, line 1660 drivers/dma/hsu/hsu.c, line 413 drivers/dma/idma64.c, line 519 drivers/dma/k3dma.c, line 352 drivers/dma/moxart-dma.c, line 364 drivers/dma/omap-dma.c, line 688 drivers/dma/pxa_dma.c, line 778 drivers/dma/qcom/bam_dma.c, line 539 drivers/dma/s3c24xx-dma.c, line 755 drivers/dma/sa11x0-dma.c, line 402 drivers/dma/stm32-dma.c, line 949 drivers/dma/sun4i-dma.c, line 218 drivers/dma/sun6i-dma.c, line 929 drivers/dma/tegra210-adma.c, line 598 drivers/dma/virt-dma.h, line 149 drivers/dma/zx296702_dma.c, line 330