Re: linux-next: manual merge of the block tree with the fscrypt tree

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On Tue, Jan 15, 2019 at 07:55:39PM -0700, Jens Axboe wrote:
> On 1/15/19 7:25 PM, Stephen Rothwell wrote:
> > Hi all,
> > 
> > Today's linux-next merge of the block tree got a conflict in:
> > 
> >   fs/ext4/readpage.c
> > 
> > between commit:
> > 
> >   acc9eb0a6073 ("ext4: add fs-verity read support")
> > 
> > from the fscrypt tree and commit:
> > 
> >   eb754eb2a953 ("block: allow bio_for_each_segment_all() to iterate over multi-page bvec")
> > 
> > from the block tree.
> > 
> > I fixed it up (see below - the former moved the code modified by the
> > latter) and can carry the fix as necessary. This is now fixed as far as
> > linux-next is concerned, but any non trivial conflicts should be mentioned
> > to your upstream maintainer when your tree is submitted for merging.
> > You may also want to consider cooperating with the maintainer of the
> > conflicting tree to minimise any particularly complex conflicts.
> 
> Ming, I'm pulling this, I thought we agreed none of these bullshit
> renames? The fact that a patch looks like this:
> 
> -               for_each_bvec(bv, (it)->bvecs, __cur_iter, __cur_iter)        \
> +               for_each_segment(bv, (it)->bvecs, __cur_iter, __cur_iter)     \
> 
> is SUPER annoying and does NOTHING but to cause merge conflicts.
> 
> Resend it without that.

We need to differentiate 'segment' with 'bvec' in bvec helpers, which is
usually seldom used by drivers. For example, only two in-tree users(ceph, iov_iter).
That is why I rename it, and seems Christoph prefers to do it too.

Thanks,
Ming



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