Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=482eb689169948e9f4966fbae6be4d6bc0bfa818
Commit: 482eb689169948e9f4966fbae6be4d6bc0bfa818
Parent: 6da127ad0918f93ea93678dad62ce15ffed18797
Author: Pete Wyckoff <[EMAIL PROTECTED]>
AuthorDate: Tue Jan 1 10:23:02 2008 -0500
Committer: Jens Axboe <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 10:04:46 2008 +0100
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 <[EMAIL PROTECTED]>
Signed-off-by: Jens Axboe <[EMAIL PROTECTED]>
---
include/linux/blkdev.h | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 49b7a4c..c7a3ab5 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 */
-
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