From 482eb689169948e9f4966fbae6be4d6bc0bfa818 Mon Sep 17 00:00:00 2001 From: Pete Wyckoff Date: Tue, 1 Jan 2008 10:23:02 -0500 Subject: [PATCH] block: allow queue dma_alignment of zero Let queue_dma_alignment return 0 if it was specifically set to 0. This permits devices with no particular alignment restrictions to use arbitrary user space buffers without copying. Signed-off-by: Pete Wyckoff Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 49b7a4c31a..c7a3ab575c 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -836,12 +836,7 @@ static inline int bdev_hardsect_size(struct block_device *bdev) static inline int queue_dma_alignment(struct request_queue *q) { - int retval = 511; - - if (q && q->dma_alignment) - retval = q->dma_alignment; - - return retval; + return q ? q->dma_alignment : 511; } /* assumes size > 256 */ -- 2.39.5