On Wed, Nov 21, 2018 at 11:06:11PM +0800, Ming Lei wrote:

bvec_iter_* is used for single-page bvec in current linus tree, and there are
lots of users now:

[linux]$ git grep -n "bvec_iter_*" ./ | wc
    191     995   13242

If we have to switch it first, it can be a big change, just wondering if Jens
is happy with that?

Your above grep statement seems to catch every use of struct bvec_iter,
due to the *.

Most uses of bvec_iter_ are either in the block headers, or are
ceph wrappers that match the above and can easily be redefined.