Re: [dm-devel] [PATCH 2/2] block: defer the use of inline biovecs for discard requests

[Christoph Hellwig <hch lst de>]

On Sat, Jun 26, 2010 at 03:56:51PM -0400, Mike Snitzer wrote:
> Don't alloc discard bio with a biovec in blkdev_issue_discard.  Doing so
> means bio_has_data() will not be true until the SCSI layer adds the
> payload to the discard request via blk_add_request_payload.
> 
> bio_{enable,disable}_inline_vecs are not expected to be widely used so
> they were exported using EXPORT_SYMBOL_GPL.

Why do we need them exported at all?  Also some comments on these
functions would be useful.

Otherwise it looks good to me.