This is against Jens' for-2.6.26 branch.
==
From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Subject: [PATCH] block: fix blk_queue_dma_pad comment
rq->data_len is always equal to the true data length.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Cc: Tejun Heo <htejun@xxxxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
---
block/blk-settings.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 5713f7e..74f53ed 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -299,9 +299,8 @@ EXPORT_SYMBOL(blk_queue_stack_limits);
*
* Set pad mask. Direct IO requests are padded to the mask specified.
*
- * Appending pad buffer to a request modifies ->data_len such that it
- * includes the pad buffer. The original requested data length can be
- * obtained using blk_rq_raw_data_len().
+ * Appending pad buffer to a request modifies the last entry of a
+ * scatter list such that it includes the pad buffer.
**/
void blk_queue_dma_pad(struct request_queue *q, unsigned int mask)
{
--
1.5.4.2
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