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Date:   Wed, 20 Jul 2022 04:17:20 +0100
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Alexander Gordeev <agordeev@linux.ibm.com>
Cc:     Matthew Wilcox <willy@infradead.org>,
        Alexander Egorenkov <egorenar@linux.ibm.com>,
        Heiko Carstens <hca@linux.ibm.com>,
        Baoquan He <bhe@redhat.com>, Christoph Hellwig <hch@lst.de>,
        Vasily Gorbik <gor@linux.ibm.com>,
        linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH v4 0/4] s390/crash: support multi-segment iterators
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On Tue, Jul 19, 2022 at 07:16:32AM +0200, Alexander Gordeev wrote:
> Hi Matthew et al,
> 
> This series completes 5d8de293c224 ("vmcore: convert copy_oldmem_page()
> to take an iov_iter") for s390.
> 
> Changes since v3:
>   - concurrent access to HSA and oldmem swap buffers protected;
> 
> Changes since v2:
>   - Matthew Wilcox suggestion is adopted, with that...
>   - copy_to_iter() is used instead of custom implementation;
> 
> Changes since v1:
>   - number of bytes left to copy on fail fixed;

OK...  Do you prefer it to go through s390 tree?  The thing is, I've
stuff in iov_iter tree that conflicts with it; I'll gladly drop that
bit (vfs.git #fixes-s390) in favour of your series (and drop s390
bits from "new iov_iter flavour - ITER_UBUF" in #work.iov_iter - they
are not needed anymore).

I can put your series into replacement of #fixes-s390, or pull it
from whatever static branch you put it into - up to you.
Preferences?