dma_drain_buffer 526 block/blk-merge.c memset(q->dma_drain_buffer, 0, q->dma_drain_size); dma_drain_buffer 530 block/blk-merge.c sg_set_page(sg, virt_to_page(q->dma_drain_buffer), dma_drain_buffer 532 block/blk-merge.c ((unsigned long)q->dma_drain_buffer) & dma_drain_buffer 720 block/blk-settings.c q->dma_drain_buffer = buf; dma_drain_buffer 1373 drivers/ata/libata-scsi.c kfree(q->dma_drain_buffer); dma_drain_buffer 1374 drivers/ata/libata-scsi.c q->dma_drain_buffer = NULL; dma_drain_buffer 480 include/linux/blkdev.h void *dma_drain_buffer;