On 02/11/2015 06:07 AM, Christoph Hellwig wrote:
The tape drivers (and the sg driver in a special case that doesn't matter here) use the null_mapped flag to tell blk_rq_map_user to not copy around any data into or out of the bounce buffers. blk_rq_map_user_iov never got that treatment, which didn't matter until I refactored blk_rq_map_user to be implemented in terms of blk_rq_map_user_iov.
So this fixes a regression caused by: commit ddad8dd0a162fde61646a627a3017c258601dc8a Author: Christoph Hellwig <[email protected]> Date: Sun Jan 18 16:16:29 2015 +0100 block: use blk_rq_map_user_iov to implement blk_rq_map_user Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Ming Lei <[email protected]> Signed-off-by: Jens Axboe <[email protected]> which we should probably note in the commit. I'll add that. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
